Refractometer
Please choose the categories:
Hand Held Refractometer
The Hand Held Refractometers are specially designed for measuring the concentration of many kinds of solution listed as following: Juices、Beverages、Honey、 Salt water、Brine、Cleaning fluid、battery fluid、Antifreeze and Industrial fluids etc. And they can also test for the proportion of the water-soluble solution. They can be easily used and they are competitive in price. You only need to drop some water on the prism and then make it towards to the sunlight. Then the reading of the concentration will appear. And ATC means automatic temperature compensation.
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Please choose the categories:
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- Battery/Antifreeze/Cleaning Fluid
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Brix
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHB0-80 |
Brix: 0-80% |
Brix: 0.5% |
Brix: ±0.5% |
Without Atc |
| RHB0-90 |
Brix: 0-90% |
Brix: 0.2% |
Brix: ±0.2% |
Without Atc |
| RHB-10 |
Brix: 0-10% |
Brix: 0.1% |
Brix: ±0.1% |
Without Atc |
| RHB-10ATC |
Brix: 0-10% |
Brix: 0.1% |
Brix: ±0.10% |
Atc |
| RHB-18 |
Brix: 0-18% |
Brix: 0.1% |
Brix: ±0.10% |
Without Atc |
| RHB-32 |
Brix: 0-32% |
Brix: 0.2% |
Brix: ±0.20% |
Without Atc |
| RHB-32ATC |
Brix: 0-32% |
Brix: 0.2% |
Brix: ±0.20% |
Atc |
| RHB-32bp |
Brix: 0-32% |
Brix: 0.2% |
Brix: ±0.20% |
Without ATC |
| RHB-32bpATC |
Brix: 0-32% |
Brix: 0.2% |
Brix: ±0.20% |
Atc |
| RHB-5 |
Brix: 0-5% |
Brix: 0.1% |
Brix: ±0.10% |
Without Atc
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| RHB-55 |
Brix: 0-55% |
Brix: 1% |
Brix: ±1% |
Without Atc |
| RHB58-92 |
Brix: 58-92%
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Brix: 0.2% |
Brix: ±0.2% |
Without ATC |
| RHB-62 |
Brix: 28-62% |
Brix: 0.2% |
Brix: ±0.20% |
Without Atc |
| RHB-62ATC |
Brix: 28-62% |
Brix: 0.2%x |
Brix: ±0.2% |
Atc |
| RHB-82 |
Brix: 45-82% |
Brix: 0.5% |
Brix: ±0.50% |
Without Atc |
| RHB-82ATC |
Brix: 45-82% |
Brix: 0.5% |
Brix: ±0.5% |
Atc |
| RHB-90 |
Brix: 58-90%
Baume: 38-43Be'
water: 12-27% |
Brix: 0.5%
Baume: 0.5Be'
water: 1% |
Brix: ±0.5%
Baume: ±0.5Be'
water: ±1% |
Without Atc |
| RHB-90ATC |
Brix: 58-90%
Baume: 38-43Be'
water: 12-27% |
Brix: 0.5%
Baume: 0.5Be'
water: 1% |
Brix: ±0.5%
Baume: ±0.5Be'
water: ±1% |
Atc |
Salinity
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHS-10 |
Salinity: 0-100‰
Specific gravity:
1.000-1.070 |
Salinity: 1‰
Specific gravity:
0.001 |
±1‰
Specific gravity:
±0.001
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Without Atc |
| RHS-10ATC |
Salinity: 0-100‰
Specific gravity:
1.000-1.070 |
Salinity: 1‰
Specific gravity:
0.001 |
Salinity: ±0.001
Specific gravity:
±0.001 |
Atc |
| RHS-28 |
Salinity: 0-28% |
Salinity: 0.2% |
Salinity: ±0.2% |
Without Atc |
| RHS-28ATC |
Salinity: 0-28% |
Salinity: 0.2% |
Salinity: ±0.2% |
Atc |
Clinical Protein
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHC-200 |
Serum Protein:
0-12g/dl
Specific Gravity:
1.000-1.050sg
Refractive Index:
1.330RI-1.360RI |
Serum Protein:
0.2g/dl
Specific Gravity:
0.005sg
Refractive Index:
0.0005RI |
Serum Protein:
±0.2g/dl
Specific Gravity:
±0.005sg
Refractive Index:
±0.0005RI |
Without Atc |
| RHC-200ATC |
Serum Protein:
0-12g/dl
Specific Gravity:
1.000-1.050sg
Refractive Index:
1.330RI-1.360RI |
Serum Protein:
0.2g/dl
Specific Gravity:
0.005sg
Refractive Index:
0.0005RI |
Serum Protein:
±0.2g/dl
Specific Gravity:
±0.005sg
Refractive Index:
±0.0005RI |
Atc |
Battery/Antifreeze/Cleaning Fluid
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHA-100 |
Ethylene Glycol:
-84° F-32° F
Propylene Glycol:
-60° F-32° F
Battery:
1.100-1.400sg |
Ethylene Glycol:
5° F
Propylene Glycol:
5° F
Battery:
0.01sg |
Ethylene Glycol:
±5° F
Propylene Glycol:
±5° F
Battery:
±0.01sg |
Without Atc |
| RHA-100ATC |
Ethylene Glycol:
-84° F-32° F
Propylene Glycol:
-60° F-32° F
Battery:
1.100-1.400sg |
Ethylene Glycol:
5° F
Propylene Glycol:
5° F
Battery:
0.01sg |
Ethylene Glycol:
±5° F
Propylene Glycol:
±5° F
Battery:
±0.01sg |
ATC |
| RHA-200 |
Ethylene Glycol:
-60°C-0°C
Propylene Glycol:
-50°C-0°C
Battery:
1.100-1.400sg |
Ethylene Glycol:
5°C
Propylene Glycol:
5°C
Battery:
0.01sg |
Ethylene Glycol:
±5°C
Propylene Glycol:
±5°C
Battery:
±0.01sg |
Without Atc |
| RHA-200ATC |
Ethylene Glycol:
-60°C-0°C
Propylene Glycol:
-50°C-0°C
Battery:
1.100-1.400sg |
Ethylene Glycol:
5°C
Propylene Glycol:
5°C
Battery:
0.01sg |
Ethylene Glycol:
±5°C
Propylene Glycol:
±5°C
Battery:
±0.01sg |
ATC |
| RHA-300F |
Ethylene Glycol:
-60°F-32°F
Propylene Glycol:
-50°F-32°F
Battery: 1.15-1.30sg |
Ethylene Glycol:
10°F
Propylene Glycol:
10°F
Battery:
0.01sg |
Ethylene Glycol:
±10°F
Propylene Glycol:
±10°F
Battery:
±0.01sg |
Without Atc |
| RHA-303 |
Ethylene Glycol:
-70°C-0°C
Propylene Glycol:
-60°C-0°C
Battery:
1.100-1.400sg |
Ethylene Glycol:
5°C
Propylene Glycol:
5°C
Battery:
0.01sg |
Ethylene Glycol:
±5°C
Propylene Glycol:
±5°C
Battery:
±0.01sg |
Without ATC |
| RHA-403C |
Ethylene Glycol:
-50°C-0°C
Propylene Glycol:
-50°C-0°C
Battery:
1.15-1.30sg
Cleaner:
-40°C-0°C |
Ethylene Glycol:
5°C
Propylene Glycol:
5°C
Battery:
0.01sg
Cleaner:
5°C |
Ethylene Glycol:
±5°C
Propylene Glycol:
±5°C
Battery:
±0.01sg
Cleaner:
±5°C |
Without Atc |
| RHA-501 |
Battery:
1.10sg-1.40sg
Ethylene Glycol:
-60°F-32°F
Ethylene Glycol:
-50°C-0°C
Propylene Glycol:
-50°C-0°C
Propylene Glycol:
-50°F-32°F |
Battery:
0.01sg
Ethylene Glycol:
10°F
Ethylene Glycol:
5°C
Propylene Glycol:
5°C
Propylene Glycol:
10°F |
Battery:
±0.01sg
Ethylene Glycol:
±10°F
Ethylene Glycol:
±5°C
Propylene Glycol:
±5°C
Propylene Glycol:
±10°F |
Without Atc |
| RHA-503C |
Battery:
1.100-1.400sg
Ethylene Glycol:
-50°C-0°C
Propylene Glycol:
-50°C-0°C
Cleaner:
-40°C-0°C |
Battery:
0.01sg
Ethylene Glycol:
5°C
Propylene Glycol:
5°C
Cleaner:
5°C |
Battery:
±0.01sg
Ethylene Glycol:
±5°C
Propylene Glycol:
±5°C
Cleaner:
±5°C |
Without Atc |
| RHA-800 |
B：1.000~1.400sg
A：0%~100%
F：-60℃~0℃ |
0.01sg
5%
5℃ |
±0.01sg
±5%
±5℃ |
Without Atc |
| RHA-800ATC |
B：1.000~1.400sg
A：0%~100%
F：-60℃~0℃ |
0.01sg
5%
5℃ |
±0.01sg
±5%
±5℃ |
Atc |
Alcohol
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHW-80 |
v/v: 0-80% |
v/v: 1% |
v/v: ±1% |
Without Atc |
Honey Tester
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHH13-25 |
water：13-25% |
water：0.1% |
water：±0.1% |
Without Atc |
| RHH-90(RHB-90) |
Brix: 58-90%
Baume: 38-43Be'
water: 12-27% |
Brix: 0.5%
Baume: 0.5Be'
water: 1% |
Brix: ±0.5%
Baume: ±0.5Be'
water: ±1% |
Without Atc |
| RHH-90ATC(RHB-90ATC) |
Brix: 58-90%
Baume: 38-43Be'
water: 12-27% |
Brix: 0.5%
Baume: 0.5Be'
water: 1% |
Brix: ±0.5%
Baume: ±0.5Be'
water: ±1% |
Atc |
Contact Lens Tester
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHL35-80 |
Water: 35-80% |
Water: 1% |
Water: ±1% |
Without ATC |
Grape Tester
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHW-25 |
Alcohol：0-25% |
Alcohol：0.2% |
Alcohol：±0.20% |
Without Atc |
| RHW-25a |
Alcohol：0-25%
Baume: 0-20 be° |
Alcohol：0.2%
Baume: 0.2 be° |
Alcohol：±0.2%
Baume: ±0.2 be° |
Without Atc |
| RHW-25aATC |
Alcohol：0-25%
Baume: 0-20be° |
Alcohol：0.2%
Baume: 0.2 be° |
Alcohol：±0.2%
Baume: ±0.2 be° |
Atc |
| RHW-25ATC |
Alcohol：0-25% |
Alcohol：0.2% |
Alcohol：±0.20% |
ATC |
| RHW-25b |
Alcohol：0-25%
Brix: 0-40% |
Alcohol：0.2%
Brix: 0.2% |
Alcohol：±0.2%
Brix: ±0.2% |
Without Atc |
| RHW-25bATC |
Alcohol：0-25%
Brix: 0-40% |
Alcohol：0.2%
Brix: 0.2% |
Alcohol：±0.2%
Brix: ±0.2% |
Atc |
Soybean Milk Tester
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHD-25 |
SM：0-25% |
SM：0.1% |
SM：±0.1% |
Without Atc |
Gem Tester
| Model |
Range |
Min.Div. |
| RHG-181 |
Refractive Index:
1.30-1.81 |
Refractive Index:
0.01 |
°OE Tester
| Model |
Range |
Min.Div. |
Accuracy |
Remark |
| RHBS-32 |
Brix: 0-32%
Oechsle: 0-140°Oe
KMW: 0-25° |
Brix: 0.2%
Oechsle: 1.0°Oe
KMW: 0.2° |
Brix: ±0.2%
Oechsle: ±1.0°Oe
KMW: ±0.2° |
Without ATC |
| RHBS-32a |
Brix: 0-32%
Oechsle: 30-140°Oe |
Brix: 0.2%
Oechsle: 1.0°Oe |
Brix: ±0.2%
Oechsle: ±1.0°Oe |
Without ATC |
| RHBS-32aATC |
Brix: 0-32%
Oechsle: 30-140°Oe |
Brix: 0.2%
Oechsle: 1.0°Oe |
Brix: ±0.2%
Oechsle: ±1.0°Oe |
ATC |
| RHBS-32ATC |
Brix: 0-32%
Oechsle: 0-140°Oe
KMW: 0-25° |
Brix: 0.2%
Oechsle: 1.0°Oe
KMW: 0.2° |
Brix: ±0.2%
Oechsle: ±1.0°Oe
KMW: ±0.2° |
ATC |
| RHBS-44 |
Brix: 0-44%
Oechsle: 0-190°Oe
KMW: 0-40° |
Brix: 0.5%
Oechsle: 2.0°Oe
KMW: 0.5° |
Brix: ±0.5%
Oechsle: ±2.0°Oe
KMW: ±0.5° |
Without Atc |
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Digital refractometer
Digital Refractometer is a kind of digit product based on the hand-held refractometer. The gigit can be displayed. Comparing with the hand-held refractometer, it is more intuitionistic and accutate. It is equipped with ATC.
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Please choose the categories:
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- Digital for Clinical Protein
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- Digital for Battery/Antifreeze/Cleaning Fluid
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Digital for Brix
| Model |
Scale |
Range |
Div. |
Accur. |
| DRB0-45 |
Brix |
0-45% |
0.1% |
±0.2% |
| DRB0-45nD |
Brix
Refractive Index |
0-45%
1.3330-1.4098 |
0.1%
0.0001 |
±0.2%
±0.0003 |
| DRB28-65 |
Brix |
28-65% |
0.1% |
±0.2% |
| DRB28-65nD |
Brix
Refractive Index |
28-65%
1.3770-1.4535 |
0.1%
0.0001 |
±0.2%
±0.0003 |
| DRB58-92 |
Brix |
58-92% |
0.1% |
±0.2% |
| DRB58-92nD |
Brix
Refractive Index |
58-92%
1.4370-1.5232 |
0.1%
0.0001 |
±0.2%
±0.0003 |
| DRBS-300 |
Brix
Salinity
Refractive Index |
0-35%
0-28%
1.3330-1.3900 |
0.1%
0.1%
0.0001 |
±0.2%
±0.2%
±0.0003 |
Digital for Salinity
| Model |
Scale |
Range |
Div. |
Accur. |
| DRS0-28 |
Salinity |
0-28% |
0.1% |
±0.2% |
| DRS0-28nD |
Salinity
Refractive Index |
0-28%
1.3330-1.3900 |
0.1%
0.0001 |
±0.2%
±0.0003 |
| DRBS-300 |
Brix
Salinity
Refractive Index |
0-35%
0-28%
1.3330-1.3900 |
0.1%
0.1%
0.0001 |
±0.2%
±0.2%
±0.0003 |
Digital for Clinical Protein
| Model |
Scale |
Range |
Div. |
Accur. |
| DRC-200 |
Urine SP.G
Serum P.
Refractive Index |
1.000-1.050
0-12g/dl
1.3330-1.3900 |
0.001
0.1
0.0001 |
±0.001
±0.1
±0.0003 |
Digital for Battery/Antifreeze/Cleaning Fluid
| Model |
Scale |
Range |
Div. |
Accur. |
| DRA-403C |
Propylene Glycol
Ethylene Glycol
Battery
Cleaner |
-95-0 ℃
-70-0 ℃
1.000-1.510sg
-72-0 ℃ |
0.1 ℃
0.1 ℃
0.01sg
0.1 ℃ |
±0.20 ℃
±0.20 ℃
±0.01sg
±0.20 ℃ |
| DRA-403F |
Propylene Glycol
Ethylene Glycol
Battery
Cleaner |
-130-32 ℉
-95-32 ℉
1.000-1.510sg
-100-32 ℉ |
0.1 ℉
0.1 ℉
0.01sg
0.1 ℉ |
±0.5 ℉
±0.5 ℉
±0.01sg
±0.5 ℉ |
Digital for °Oe Tester
| Model |
Scale |
Range |
Div. |
Accur. |
| DRB-400 |
MASS s/v
Vol AP
Oe
KMN |
0-35%
0-22%
0-150
0-25 |
0.1%
0.1%
1.0
0.1 |
±0.2%
±0.2%
±1.0
±0.2 |
Digital for Honey Tester
| Model |
Scale |
Range |
Original Point |
Div. |
Accur. |
| DRH-300 |
Nd
°Be′
WATER |
1.4419-1.5232
33.1-47.7
38.4%-5.4% |
1.4419(±0.0001)
33.1
38.4 |
0.0001
0.1
0.1% |
±0.0003
±0.2%
±0.2% |
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Abbe Refractometer
This instrument is designed for the measurement of refractive index(nD) and the average optical dispersion(NF-NC) of the transparent, the semitransparent and the solid matter (mostly transparent). It was connect with a circulating thermostatic bath, can measure the refractive index in 0℃~50℃. It also measures the Brix percentage of sugar solution[(0-95)℃ which is equal to th refractive index1.333-1.531]. It was widely used in oil industry, fat industry, pharmaceutical factories, paint, food processing, chemistry, sugar refineries, geologic etc., and relative factories, school and research center.
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Please choose the categories:
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Technical data
| Model |
WY1A |
WYA |
2WAJ |
| Refractive Index(nD) Range |
1.300~1.700 |
1.300~1.700 |
1.300~1.700 |
| Refractive Index (nD) Accuracy |
±0.0003 |
±0.0003 |
±0.0002 |
| Refractive Index (nD) Min.Div. |
0.0005 |
0.0005 |
0.0005 |
| Brix（%）Range |
(0~95)% |
(0~95)% |
(0~95)% |
| Brix（%）Min.Div. |
0.25% |
0.25% |
0.25% |
| Size（mm） |
370x240x440 |
150x150x300 |
90x190x250 |
| Weight（KG） |
6.5 |
4.9 |
3 |
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1. Operation Manual for Hand-held Refractometer
2. RHB0-90 0~90%Brix Instructions Operating
3. GEM-TESTER RHG-181 Operation Manual
4. RHB0-80 Operation Manual
5. RHL35-80 designed for testing the water concentration in contact lens.
6. Warning-Maintenance
7. Operation Manual for Digital Refractometer
8. Use Instruction for Abbe Refractometer
9. Operation Manual for high sugar concentration refractometer
1. Operation Manual for Hand-held Refractometer
I.Structure Drawing
II.Operation Manual
Step 1.
Open daylight plate, and place 2~3 drops of distilled water or standard solution on the prism. Close the daylight plate so the water spreads across the entire surface of the prism without air bubbles or dry spots. Allow the sample on the prism for approximately 30 seconds before going to step 2. (THIS ALLOW THE SAMPLE TO ADJUST TO THE AMBIENT TEMPERATURE OF THE REFRACTOMETER.) |
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Step 2.
Hold daylight plate in the direction of a light source and look into the eyepiece. You will see a circular field with graduations down the center (you may have to focus the eyepiece to clearly see the graduations). The upper portion of the field should be blue, while the lower portion should be white. (The pictures showed here and showed here and showed in step 3 and step 4 are only as reference. The right specific scale is listed in the product.) |
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Step 3.
Using distilled water or standard solution as a sample, look into the eyepiece and turn the calibration screw until the boundary between the upper blue field and the lower white field meet exactly on the zero scale, such as showed in the picture. That is the end of calibration. Make sure ambient temperature is comets for the solution you are using (20℃ for our solution that is 68℉). When working temperature of the environment (not the sample) changes by more than 5℉, we recommend recalibrating to maintain accuracy and reproducibility.
If the instrument is equipped with Automatic Temperature Compensation system, the ambient working temperature of the room must be 20℃(68℉) whenever the instrument is recalibrated. Once calibrated, shifts in ambient temperature within the acceptable range (10℃~30℃) should not effect accuracy. |
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Step 4.
Do step 1. Using the specimen of liquids which will be measured as the substitution of distilled water or standard solution. Then do step 2. And step 3.. When do step 3 again, you can take the reading where the boundary line of blue and white cross the graduated scale. The will provide a direct reading of the Brix concentretion. |
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2. RHB0-90 0~90%Brix Instructions Operating
1.Cover plate
2.Knob
3.Adjusting ring
4.Entrance light prism
5.Eyepiece
DESCRIPTION
Model RHB0-90 has three scale to cover the range of 0 to 90%, scale one is 0 to 42%, scale two is 42 to 71%, scale three is 71 to 90%. The wide range substances with unknown concentrations.
METHOD OF OPERATION
1. Aim the front end of the refractometer to the direction of bright light, and adjust the adjusting ring of diopter 5 until the reticle can be seen clearly.
2. Adjustment of null
The null of this instrument has been adjusted before it is out of factory.
3. Open the entrance light prism, clean the surface of prism by soft cotton flannel, drop 1~2 drops of solution to be measured. Close the entrance light prism, press it lightly, then read the corresponding scale of light and dark boundary, the reading is the brix of measured solution.
4. If the light is not sufficient, you could rotate and adjust 1.
5. The model has three scales, you could get them by rotating 2.
6. When measure solution of high concentration, there would be chromatism in the view, you could reduce it by rotating 3.
7. After measurement, clean away the adherend on the surface of prism and cover plate by moist gauze.
ATTENTIONS AND MAINTENANCE
1. After usage, don’t use water to wash the instrument, so as to avoid water entering into the pipe of the instrument.
2. As it is a kind of precision optical instrument, you should hand it gently and take good care of it. Don’t touch and scratch the optical surfaces. It should be kept in the environment of dry, clean and non-corrosiveness air, so as to prevent the surface of it turning mouldy and foggy. Please avoid strong shock during transportation.
3. The reference of temperature is 20℃. In operation, the temperature compensation should be made according to the table.
ACCESSORY
1.Suction tube 1
2.Screw driver 1
3. GEM - TESTER RHG-181 Operation Manual
1.upper cover 2.body 3.filter 4.eyeiece 5.prism 6.polarizer
GENERAL DESCRIPTION
Refractive index is one of most important optical parameter. Gloss of gem can be estimated by the parameter.
The kinds of gem can be precisely determined in accordance with the measured value of refractive index because every kind of gem has its inherent refractive. Besides, index of double refraction can be also measured. Though the parameter you can judge whether a gem is uniaxial or biaxial photopositive or photonegative.
The gemological refractometer is characterized by small volume and less weight. It is easy to carry. It is a popular instrument used in jewelary market.
PARAMETERS OF THE INSTRUMENT
Measuring rang: 1.30~1.81
Minimum graduation value: 0.01
Size: 30*70*130mm
Weight: 400g
METHOD OF OPERATION
1. Lay the instrument on the worktable. Open the upper cover(1). Drops of special refractive oil onto the surface of prism(5) by a thin glass bar.
2. Make the ground surface of gem to be measured close up to the prism(5), depress it lightly, make refractive oil distributed evenly between the two surface. Then close the upper cover.
3. Align the entrance filter(3) of refractometer and light source, make luminance of viewing field even.
4. Move eyepiece(4) up and down. Adjust diopter approximately. Now you can see a light/dark boundary in viewing field. The graduation on which the boundary, located is the refractive index of gem as shown in right Figure.
5. The index of double refractometer of gem can be measured precisely because the filter(3) of the refractometer can eliminate the phenomenon of dispersion.
Measuring methods
Remove the polarizer(6). Turn it onto eyepiece(4). Then turn the polarzer(6) lightly. You can only read the refractive index value in one direction at a time because the polarizer only allow the light vibrated in one direction to pass through. Then turn the polarizer(6) thought 90°, you can measure the refractive index value of the light vibrated at right angles to that mentioned above. Turn the gem in the same direction through small degree then turn the polarizer(6) lightly according to above method, you can read the two refractive index values of the light vibrated at right angles to each other. Operate continuously until the gem is at 180°position to its initial position. From a number of groups of measured refractive index values you can find a group with the difference of maximum refractive index value you can find a group with the different of maximum refractive index and minimum refractive index. The difference is the value of index of double refraction of gem.
6. After measurement, clean away the refractive oil on the prism(4) then put the prism(4) into the box of instrument for protection.
ATTENTIONS AND MAINTENANCE
1. The instrument is composed of precise components. You should not dismantle it by yourself. After usage, the instrument should be stored in dry place, in order to protect the instrument from moisture and mildewing which can affect the precision of the instrument.
2. The refractive oil should be stored and sealed. While using it, you should use a thin glass bar to dip into it, don’t bring oil into touch with the hand or eye.
3. The intensity of light source should be approximate. It should be suitable to bright and even viewing field and clear observation.
4. RHB0-80 Operation Manual
developed for working with sugar related liquids(fruit juices、honey、soft drinks、wine),help monitor and control sugar concentrations in foods and beverages.Whether users are checking the“ripeness”of fruit in the field,verifying product quality after harvesting,or controlling concentrations during processing and packaging,refractometers provide critical information to ensure product quality.It is also commonly used for controlling the concentration of various industrial fluids(cutting lubricants and flux rinsing compounds).Which model to chose is according to the concentration in the liquids and the parameter of refractometer.
SERIES:
| Style |
Model |
Range |
Min.Div |
Accuracy |
Remarks |
| Sugar Refractometer |
RHB0-80 |
0-80Brix |
0.1%Brix |
±0.1% |
Without ATC |
Parts Diagram:
OPERATING INSTRUCTION:
Step 1
Open the cover plate(1),Clean the refraction prism(2) carefully with soft flannelette,Be careful not to scrape the refraction prism surface. |
 |
Setp 2
Put some drops of solution on the refrection prism surface and then cover the cover plate(1) slowly so as to let the solution be all over the prism surface. |
 |
Setp 3
Adjust the cover plate(1)against the light soure or bright place.Turn the visual range ring(7)until the graduated lines can be seen clearly.The readings of the demarcation line between brightness and darkness just indicate the sugar content in the solution.
For modle RHB-80.We can choose the range 0～50％ or 50～80％ by rotateing the knob(6). |
 |
TEMPERATURE CORRECTION
Put several drops of distilled water on the surface of the refraction prism(2).Adjust the adjusting screw (4) until the demarcation line between brightness and darkness is just on the graduated line 0％;Then proceed on the measurement of the testing object,and the reading thus obtained is the correct one.
Another methods for obtain the exact value is consulte with the temperature correction table,A temperature correction value must be added to (or subtract from)the scale reading.
The Attached Temperature Correction Table for readings of sugar content measuring gage.
| |
concentration(%) |
| 0 |
5 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
70 |
| Temperature |
10 |
To be subtracted from |
0.50 |
0.54 |
0.58 |
0.61 |
0.64 |
0.66 |
0.68 |
0.70 |
0.72 |
0.73 |
0.74 |
0.75 |
0.76 |
0.78 |
0.79 |
| 11 |
0.46 |
0.46 |
0.53 |
0.55 |
0.58 |
0.60 |
0.62 |
0.64 |
0.65 |
0.66 |
0.67 |
0.68 |
0.69 |
0.70 |
0.71 |
| 12 |
0.42 |
0.45 |
0.48 |
0.50 |
0.52 |
0.54 |
0.56 |
0.57 |
0.58 |
0.59 |
0.60 |
0.61 |
0.61 |
0.63 |
0.63 |
| 13 |
0.37 |
0.40 |
0.42 |
0.44 |
0.46 |
0.48 |
0.49 |
0.50 |
0.51 |
0.52 |
0.53 |
0.54 |
0.54 |
0.55 |
0.55 |
| 14 |
0.33 |
0.35 |
0.37 |
0.39 |
0.40 |
0.41 |
0.42 |
0.43 |
0.44 |
0.45 |
0.45 |
0.46 |
0.46 |
0.47 |
0.48 |
| 15 |
0.27 |
0.29 |
0.31 |
0.33 |
0.34 |
0.34 |
0.35 |
0.36 |
0.37 |
0.37 |
0.38 |
0.39 |
0.39 |
0.40 |
0.40 |
| 16 |
0.22 |
0.24 |
0.25 |
0.26 |
0.27 |
0.28 |
0.28 |
0.29 |
0.30 |
0.30 |
0.30 |
0.31 |
0.31 |
0.32 |
0.32 |
| 17 |
0.17 |
0.18 |
0.19 |
0.20 |
0.21 |
0.21 |
0.21 |
0.22 |
0.22 |
0.23 |
0.23 |
0.23 |
0.23 |
0.24 |
0.24 |
| 18 |
0.12 |
0.13 |
0.13 |
0.14 |
0.14 |
0.14 |
0.14 |
0.15 |
0.15 |
0.15 |
0.16 |
0.16 |
0.16 |
0.16 |
0.16 |
| 19 |
0.06 |
0.06 |
0.06 |
0.07 |
0.07 |
0.07 |
0.07 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
| 20 |
|
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 21 |
To be added to |
0.06 |
0.07 |
0.07 |
0.07 |
0.07 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
| 22 |
0.13 |
0.13 |
0.14 |
0.14 |
0.15 |
0.15 |
0.15 |
0.15 |
0.15 |
0.16 |
0.16 |
0.16 |
0.16 |
0.16 |
0.16 |
| 23 |
0.19 |
0.20 |
0.21 |
0.22 |
0.22 |
0.23 |
0.23 |
0.23 |
0.23 |
0.24 |
0.24 |
0.24 |
0.24 |
0.24 |
0.24 |
| 24 |
0.26 |
0.27 |
0.28 |
0.29 |
0.30 |
0.30 |
0.31 |
0.31 |
0.31 |
0.31 |
0.32 |
0.32 |
0.32 |
0.32 |
0.32 |
| 25 |
0.33 |
0.35 |
0.36 |
0.37 |
0.38 |
0.38 |
0.39 |
0.40 |
0.40 |
0.40 |
0.40 |
0.40 |
0.40 |
0.40 |
0.40 |
| 26 |
0.40 |
0.42 |
0.43 |
0.44 |
0.45 |
0.46 |
0.47 |
0.48 |
0.48 |
0.48 |
0.48 |
0.48 |
0.48 |
0.48 |
0.48 |
| 27 |
0.48 |
0.50 |
0.52 |
0.53 |
0.54 |
0.55 |
0.55 |
0.56 |
0.56 |
0.56 |
0.56 |
0.56 |
0.56 |
0.56 |
0.56 |
| 28 |
0.56 |
0.57 |
0.60 |
0.61 |
0.62 |
0.63 |
0.63 |
0.64 |
0.64 |
0.64 |
0.64 |
0.64 |
0.64 |
0.64 |
0.64 |
| 29 |
0.64 |
0.66 |
0.68 |
0.69 |
0.71 |
0.72 |
0.72 |
0.73 |
0.73 |
0.73 |
0.73 |
0.73 |
0.73 |
0.73 |
0.73 |
| 30 |
0.72 |
0.74 |
0.77 |
0.78 |
0.79 |
0.80 |
0.81 |
0.81 |
0.81 |
0.81 |
0.81 |
0.81 |
0.81 |
0.81 |
0.81 |
Warning-Maintenance
1.Accurate measurement depends on careful calibration.Follow the instructions above closely.Note:Shifts in ambient room temperature of the prism prior to measurement.The prism and sample must be at the same temperature for accurate results.
2.Do not expose the instrument to damp working conditions,and do not immerse the instrument in water.If the instrument becomes foggy,water has entered the body.Call a qualified service technician or contact your dealer.
3.Do not measure abrasive or corrosive chemicals with this instrument.They can damage the prism's coating.
4.Clean the instrument between each measurement using a soft,damp cloth.Failure to clean the prism on a regular basis will lead to inaccurate results and damage to the prism's coating.
5.This is an optical instrument.It requires careful handling and storage.Failure to do so can result in damage to the optical components and its basic structure.With care,this instrument will provide years of reliable service.
5. RHL35-80 designed for testing the water concentration in contact lens.
I.Structure Drawing
II.Operation Manual
Stepl.
Open the daylight plate,place a few drop of the saturated salt solution on the surface of prism.Close the dayligh plate so the sample spreads the entire surface of the prism without air bubbles or dry spots.Allow the sample to keep on the prism for approximately 30 seconds before going to
Step2.(THIS ALLOWS THE SAMPLE TO AKJUST TO THE AMBIEMT TEMPERATURE OF THE REFRACTOMETER.) |
 |
Step2.
Hold daylight plate in the directions down the center(you may have to focus the eyepiece to clearly see the graduations).The upper portion of the field should be blue,while the lower tortion should be white. |
 |
Step3.
Look into the eyepiece and confirm that the boundary between the upper and lower parts of the field,if not aligned with the “S”marking,turn the adjustment screw with screwdriver provided until they are aligned.It is the end of calibration. |
 |
Step4.
Wipe off the wet on the surface of contact len with a soft cloth(without nap).Open the daylight plate.put the contact len on the center of the prism gently,make sure the convexity should be downwards,so that the center part parallel with the surface of prism. |
 |
Step5.
Close the daylight plate and press,make sure the len be nipped between the daylight plate and the prism.Take the reading where the boundary line of the blue and white intersesect at the graduated scale.
|
 |
III.Warning-Maintenance
1) Accurate measurement depends on careful calibration.Follow the instructions above closely.
Note:Shifts in ambient room temperature of the prism prior to measurement.The prism and sample must be at the same temperature for accurate results.
2) Do not expose the instrument to damp working conditions,and do not immerse the instrument in water .If the instrument becomes foggy,water has entered the body.Call a qualified service technician or contact your dealer.
3) Do not measure abrasive or corrosive chemicals with this instrument.They can damage the prisms coating.
4) Clean the instrument between each measurement using a soft,damp cloth.Failure to clean the prism on a rigular basis will lead to inaccurate results and damage to the prisms coating.
5) This is an optical instrument.It requires careful handling and storage.Failure to do so can result in damage to the optical components and its basic structure.With care,this instrument will provide years of reliable service.
6. Warning-Maintenance
1）Accurate measurement depends on careful calibration. Follow the instructions above closely. Note: Shifts in ambient room temperature of the prism prior to measurement. The prism and sample must be at the same temperature for accurate results.
2） Do not expose the instrument to damp working conditions, and do not immerse the instrument in water. If the instrument becomes foggy, water has entered the body. Call a qualified service technician or contact your dealer.
3） Do not measure abrasive or corrosive chemicals with this instrument. They can damage the prism's coating.
4） Clean the instrument between each measurement using a soft, damp cloth. Failure to clean the prism on a regular basis will lead to inaccurate results and damage to the prism's coating.
5） This is an optical instrument. It requires careful handling and storage. Failure to do so can result in damage to the optical components and its basic structure. With care, this instrument will provide years of reliable service.
7. Operation Manual for Digital Refractometer
Ⅰ. Structure Drawing:
Ⅱ. Operation Steps:
A. Original Point Setting（Please do not forget this step）
1. Completely clear prism window .
Drop standard solution to fill
the prism window.
(The standard solution of DR28-65 and DRB28-65nD is 30% Brix solution or the solution with nD1.3812; The standard solution of DR58-92 and DRB58-92nD is 60% Brix solution or the solution with nD1.4419. The solution of other Model is distilled water.)
2. Hold “CAL” button for five seconds
till it twinkles “rEF” on LCD. Within 10 second after display “rEF”, press Mes button and hold it for five seconds. The instrument start to set Original Point. After Original Point Setting is finished, “End” will be displayed on LCD.
B. Measurement
1. Completely clear prism window. Drop solution to fill the prism window
2. Press Mes button
 
C. Conversion of Status of Scales
1. Turn it off.
2. Repeat step 1-2 to set other scale.(The chose status of scale will be stored no matter if power off.)
3. Synchronously hold “CAL” button and Mes button. Turn it on by pressing On/Off button.
Ⅲ. Other Operation
1. Installation Battery
In the case of no battery or low battery whit alert of “ “ on the upper left of LCD, you should install or replace the battery. Open the battery cover on the back of the instrument, install a battery or replace the old battery with a new one.
2. Power On and Off
Press the “On/Off” button to turn it on or off. Temperature in Centigrade will display when power on. The instrument will turn off automatically if there is no any operation in three minutes.
3. Measurement of Temperature
Temperature can be displayed at any time by press the button during measurement. The conversion of Fahrenheit and Centigrade can be made by pressing Temp button.
Ⅳ. Precautions
1. Don’t expose the instrument to low, high temperature and sun light for long time, to avoid LCD losing effectiveness.
2. Because the instrument is very precise, it prohibited from violent shock.
3. To avoid damage, don’t disassemble and assemble the instrument or change the inner circuit and parts.
4. Zero-setting should be implemented strictly according to instrument.
5. Be sure to clean the prism surface and window of stage before and after every measurement.
6. To avoid that accuracy is affected by evaporation, be sure to implement measurement immediately after dripping solution on window of stage.
7. It can cause worry result if keep measuring under low voltage.
8. Don’t use it under the strong light (as sunlight, lamp etc.)
9. Don’t use the instrument in the humid and corrosive environment.
10. Prevent from liquid into battery house.
8. Use Instruction for Abbe Refractometer
I.Purpose:
The instrument serves for measuring the refractive indices nD and mean dispersions nF-nc of transparent and translucent liquid or solid, Mainly the transparent liquid. Attaching a thermostat to this instrument, the refractive indices nD within the range of temperature 0°C~37°C can be measured. Refractive indices and mean dispersions belong to one of the important optical constants in substance, which can be used to detrmine the optical performance, purity, concentration and dispersion etc. The instrument is capable of determining the percentage of sugar content in saccharose solutions (0~95%, equal to refractive indice 1.333~1.531). Therefore, this instrument can be widely used as one of the indispensable tools in petrological, oil and fat, Pharmaceutical Paint, food, chemical and sugar - making industries as well as in the factories, colleges and research institutes concerned with geological survey.
| Refractive Index (nD) Range |
1.300 ~ 1.700 |
| Refractive Index (nD) Accuracy |
0.0002 |
| Refractive Index (nD) Min. Div. |
0.0005 |
| Brix (%) Range |
0 ~ 95 |
| Brix (%) Min. Div. |
0.25 |
| Weight (KG) |
3 |
The base of system (14) is for the purpose of support on which is mounted the housing (17). All optical components and other main structures except the prism and the eyepieces are fitted up in the housing (17). Upon the housing is fixed the prism group, which consists of the incident prism, the refracting prism and the prism mount. These two prisms are respectivly fixed in the prism mount using a special glue. The mount for incident prism (5) and the mount for refracting prism (11) are conneced with the axiles (2). The incident prism can be opened and closed. The two incident prism mounts should be closed by means of the knob (10) in such a way that a homogeneous space can be kept between the surfaces of the two prisms, and the space is to be filled with the test lipuid. (3) is the shield. (18) is the thermostat connector (four in all). (4) is the thermometer. (13) is the socket for thermometer which can be connected with a plastic hose. (1) is the reflecting mirror. (8) is the eyepiece. (9) is the covering plates. (15) is the knob for adjusting the graduation of refractive index. (6) is the knob for adjusting dispersion. (7) is the scale knob for dispersion value. (12) is the condenser for illuminating the graduated circle.
Usage and operation
I).Preparations:
1.Before measuring, one must calibrate the reading with a standard specimen and the polished surface of refracting prism should be dropped with one or two drops of naphthalene bromide, then the polished surface of the standard specimen can be put on. Observe if the bright and dark boundary line in the telecople unit lies or not in between the cross - lines, and if not adjust the screw shown of fig 7, so that the image of the boundary line moves into the center of the crosslines. Reduce the initial error of the indicating value to the minimum through repetitive observations and calibrations. including the operator's aiming error. After such a correction, do not allow to remove any doubt about the determined refractive index during routine testing work, noe can use the above - mentioned methods for correction. 2, Before measuring and doing the calculation, the rough surface of the refracting prism and the a kind of liquid mixed by 1:1 absolute alcohol and ether to prevent from dirt wihich is sure to affect image sharpness and measuring accuracy.
II). Testing work:
1. To test transparent and translucent liquid:
Drop the tested liquid onto the surface of the prism with a dropping tube then cover the incident prism with a dropping tube then cover the incident prism and lock with the knob (10), with the demand that the liquid layer should be homogeneous, spreaded full of the field of the field of view, bubble less. Open the shield (3) and close the reflecting mirror (1), then adjust the ocular dipoter so that the cross - line image sharply, then turn the knob (15) to look for the position of the bright and dark boundary line in the ocular field of view, then turn the fine-focus the knob (15) so as to make the boundary line lie in the center of the eross - lines, and eventually turn the condenser 912) properly. At this moment the value indicated below the ocular field of view is right the refracive index of the liquid under test.
2. To test transparent solids:
The object to be tested needs a smooth polished surface. Open the incident prism and add one or two drops of naphthalene bromide onto the smooth plane of refracting prism, them clean the polished surface of the tested object so that it can contact better, when the work looking for the boundary line in the eyepiece can be conducted. The procedure for aiming and reading accords with the above - mentioned.
3.To test translucent solid:
One surface of the translucent solid should be a polished plane, upon which naphthalene bromide should be dropped, then stick it on the refracitng prism, Open the reflecting mirror (1) and adjust the angle, and use it as a surface of incidence for measuring, the method for operation being the same as the above - mentioned.
4.To test the sugar concentration of sugary liquid:
The operation is similar with testing the refractive index of liquid, its reading can be taken from the indicated value of the field of view, The readout taken then is right the percentage of the sugary liquid concentration.
5.To determine mean dispersion value:
Similar with determining the refractive index. What is needed is to turn the knob (6) until the color disappears in relation to the bright and dark boundary line in the field of view, when the indicated value Z in the scale knob for dispersion graduation(7) and its refractive index nD should be taken down. According to nD,find the corresponding value of A and B from the dispersion table. If nD lies in between two figures, it can be found by interpolation. Then find the corresponding value f O' from the dispersion table according to the value Z. When Z>30, tke negative sigh; when Z>30, take positive sigh. The mean dispersion value can be given by substituting the found A,B and O' into the dispersion equation (The example is shown in the latter part of this mauls).
6.When refractive indices are required to measure at various temperatures, inasrt the thermometer into its socket (13) and connect it, which is to be adjusted to the temperature required, and the measurement can be conducted after the temperature is stabilized for the mimutes. |
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9. Operation Manual for high sugar concentration refractometer
This series are designed for measuring the solution with high sugar concentration or high refractive Index.
SERIES:
|
Style
|
Model
|
Range
|
Min.Div
|
Accuracy
|
Remarks
|
|
Sugar
Refrac-
tometer
|
RHB-82
|
45-82%Brix
|
0.5%Brix
|
± 0.5%
|
Without ATC
|
|
RHB-82ATC
|
45-82%Brix
|
0.5%Brix
|
± 0.5%
|
ATC
|
|
RHB-90
|
58-90%Brix
|
0.5%Brix
|
± 0.5%
|
Without ATC
|
| |
38-43Be ′
|
0.5 Be ′
|
± 0.5 Be ′
|
| |
12-27%Water
|
1%Water
|
± 1%Water
|
|
RHB-90ATC
|
58-90%Brix
|
0.5%Brix
|
± 0.5%
|
ATC
|
| |
38-43Be ′
|
0.5 Be ′
|
± 0.5 Be ′
|
| |
12-27%Water
|
1%Water
|
± 1%Water
|
|
RHB-92
|
58-92%Brix
|
0.2%Brix
|
± 0.2%
|
Without ATC
|
|
RHB-92ATC
|
58-92%Brix
|
0.2%Brix
|
± 0.2%
|
ATC
|
|
RHH13-25
|
13-25Water
|
0.1%Brix
|
± 0.1%
|
Without ATC
|
|
RHN1.44-1.52
|
1.435-1.52ND
|
0.001NC
|
± 0.001ND
|
Without ATC
|
Parts Diagram:
Operation Steps:
|
Step1.
Open daylight plate, and place 2-3 drops of sandard solution on the prism. Put the standard gass on the sample and let the solution spreads aross the entire surface of the prism and the undrside of the standard glass without air bubbles or dy spots. Allow the sample on the prism for appximately 30 seconds before going to step2.
(THIS ALLOW THE SAMPLE TO ADJUST TO THE AMBIENT TEMPERATURE OF THE REFRACTOMETER.)
|
 |
|
Step 2.
Hold daylitht plate in the direction of a light source and look into the eyepiece. You will see a circular field with graduations down the center ( you may have to focus the eyepiece to clearly see the graduations ). The upper portion of the field should be blue, while the lower portion should be white. ( The pictures showed here and showed in step 3 and step 4 are only as reference. The right specific scale is listed in the roduct.)
|
 |
|
Step 3.
Look into the eyepiece and turn the calibration screw until the boundary between the upper blue field and the lower white field meet exactly on the standard scale. Please see the standard datas as list on the right.(The instrument has been calibrated, if the instrument is with ATC, we recommend to delete the calibration.)
|
 |
|
Step 4.
Do step 1. Using the specimen of liquids which will be measured as the substitution of standard solution. Then do step 2. And step 3.. When do step 3 again, you can take the reading where the boundary line of blue and white cross the graduated scale. They will provide a direct reading of the Brix concentretion.
|
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ATTENTIONS AND MAINTENANCE
1、The instrument is composed of precise components. You should not dismantle It by yourself. After usage, the instrument should be stored in dry place, in order To protect the instrument from moisture and mildewing which can affect the precision of the instrument.
2、The refractive oil should be stored and sealed. While using it, you should use a thin glass bar to dip into it, don't bring oil into touch with the hand or eye.
3、The intensity of light source should be approximate. It should be suitable to Bright and even viewing field and clear observation.
|
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1. Operation Manual for Hand-held Refractometer
2. RHB0-90 0~90%Brix Instructions Operating
3. GEM-TESTER RHG-181 Operation Manual
4. RHB0-80 Operation Manual
5. RHL35-80 designed for testing the water concentration in contact lens.
6. Warning-Maintenance
7. Operation Manual for Digital Refractometer
8. Use Instruction for Abbe Refractometer
9. Operation Manual for high sugar concentration refractometer
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