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OPTi DIGITAL REFRACTOMETER
Premium hand held digital refractometers for use in harsh environments.
Digital refractometers,Digital refractometer FEATURES:
  • Ergonomic design
  • Wide application scope
  • Single and Duo scale models
  • Zero calibrate with water
  • Shallow prism dish
  • Small hand print
To Order Call 1-800-876-1172
Digital Refractometer Options & Prices
On this page:

. Digital Refractometers Product Description
. Digital Refractometer Specifications
. Digital Refractometer Options & Prices

Downloads (PDF):

. Digital Refractometer Brochure
. Digital Refractometers Manual

Additional Information:

. Digital refractometer selection guide
. Digital refractometer use in aviation applications
. Digital refractometer use in salinity measurements
. Digital refractometer use in root vegetable sugar measurements
. Digital Refractometer Overview
. Digital Refractometer Product Support

Digital Refractometers Product Description
The new OPTi hand held digital refractometers designed in 2011 are manufactured in the UK as highly reliable premium quality instruments suitable for use in the harshest of environments across a wide variety of applications.  The digital refractomers have an extensive range of scale types for use in a wide variety of applications.  The different digital refractometers within the OPTi family cover not only the commonplace food, beverage and chemical applications, but also life science, automotive, heat transfer and even customer specific applications.

The OPTi digital refractometers have both single and dual (duo) scale model types with a clear scale indicator and simple push buttons.  A 4-1/2 digit LCD screen provides the digital refractometer user a complete readout of extended text scales such as specific gravity and refractive index.  The compact design with the slimmest profile on the market means that the digital refractometers are much more pleasant to carry in your pocket.  Each digital refractometer has a water zero calibration option, which means that there is no need for expensive sucrose solutions even for high range models.

OPTi digital refractometers are constructed using the latest manufacturing techniques including 316 stainless steel injection molding to construct the easy clean prism dish. Ultrasonic welding provides dust and moisture ingress protection to IP65 levels by bonding the digital refractometer's ABS housing and rubberized switch membrane.  The OPTi digital refractometers may be used to control the dissolved solids or blend ratios of numerous products from fresh fruit to industrial chemicals.

Life Science Applications
Digital refractometers play small but vital role within the life science sector for both human and veterinary use.  Whether the need is to control the sugar content of sports drinks prior to consumption or to track hydration levels of our athletes taking part in a sporting event, the duo scale OPTi-Sport digital refractometer is the right for the job.  Similarly in the veterinary field, the OPTi-Vet digital refractometer is used to ascertain sugar levels of animal urine, large and small, as part of a diagnostic procedure.

The OPTi-Aquarium digital refractometers also have two scales expressing seawater concentration in either parts per thousand (PPT) or specific gravity (SG) and is not only used as a means to test the salt content of fish tanks at home or within the fish farming industry (aquaculture) but also in our shipping industries, where seawater is used as an engine coolant, and as an environmental tool to track the stability and degradation of our rare wetlands and salt plains.

The OPTi digital refractometers also play an important part in horse and rare animal breeding too, where the instrument is used to monitor mare's milk colostrum quality to ensure the correct levels of immunoglobin is being delivered during those first few days of life!
Digital Refractometers Specifications
Part Number: Type: Scale: Range: Resolution: Accuracy:
38-02 Brix 54 Sugar % (°Brix) 0 to 54 0.1 +0.2
38-20 RI 1.42 Refractive Index (RI) 1.33-1.42 0.0001 +0.0003
38-31 General Purpose C1 A) Sugar % (°Brix)
B) Refractive Index (RI) ATC
0 to 54
1.33-1.42
0.1
0.0001
+0.2
+0.0003
38-37 Chemical C2 A) Refractive Index (RI)
B) Temp °C (no ATC)
1.33-1.42
5 to 40 °C
0.0001
0.1
+0.0003
+1
38-22 Starch 30 Starch % 0 to 30 0.1 +0.2
38-23 Urea 40 % Urea (CRC data) 0 to 40 0.1 +0.2
38-28 Saline 28 Salinity (% NaCl) 0 to 28 0.1 +0.2
38-41 Wine AP A) % Mass w/w
B) Alcohol Probable (AP)
0 to 35
0 to 22
0.1
0.1
+0.2
+0.2
38-42 Wine OE-D A) % Mass w/w
B) Oechsle (German)
0 to 35
30 to 130
0.1
1
+0.2
+1
38-43 Wine OE-CH A) % Mass w/w
B) Oechsle (Swiss)
0 to 35
0 to 130
0.1
1
+0.2
+1
38-44 Wine KMW A) % Mass w/w
B) KMW (Babo)
0 to 35
0 to 25
0.1
1
+0.2
+1
38-45 Wine Baumé A) % Mass w/w
B) °Baumé
0 to 35
0 to 28
0.1
0.1
+0.2
+0.2
38-46 Wine Baumé/AP A) °Baumé
B) Alcohol Probable (AP)
0 to 28
0 to 22
0.1
0.1
+0.2
+0.2
38-47 ABV A) % Mass w/w
B) ABV (°Zeiss)
0 to 35
10 to 135
0.1
0.1
+0.2
+0.5
38-49 Brew A) ABV (°Zeiss)
B) °Plato
10 to 135
0 to 30
0.1
0.1
+0.5
+0.2
38-70 Heat Transfer PG/C A) Propylene Glycol % by volume
B) Propylene Glycol °C Protection (freezing point)
0 to 60
0 to -50
0.1
1
+0.4
+1
38-71 Heat Transfer EG/C A) Ethylene Glycol % by volume
B) Ethylene Glycol °C Protection (freezing point)
0 to 60
0 to -50
0.1
1
+0.4
+1
38-72 Heat Transfer EG/PG A) Ethylene Glycol % by volume
B) Propylene Glycol % by volume
0 to 60
0 to 60
0.1
0.1
+0.4
+0.4
38-74 Heat Transfer EG/F A) Ethylene Glycol % by volume
B) Ethylene Glycol °F Protection (freezing point)
0 to 60
30 to -40
0.1
1
+0.4
+1
38-81 Coolant A) °Brix
B) Refractive Index (RI)
0 to 18
1.33 to 1.38
0.1
0.0001
+0.2
+0.0003
38-61 Auto A1 A) °Brix
B) Ethylene Glycol °C Protection (freezing point)
0 to 54
0 to -50
0.1
1
+0.2
+1
38-62 Auto A2 A) °Brix DEF
B) Adblue®
0 to 54
0 to 40
0.1
0.1
+0.2
+0.2
38-63 Auto A3 A) °Brix
B) Propylene Glycol °C Protection (freezing point)
0 to 54
0 to -50
0.1
1
+0.2
+1
38-65 Auto A4 DEF/C-EG A) DEF Adblue®
B) Ethylene Glycol °C Protection (freezing point)
0 to 40
0 to -50
0.1
1
+0.2
+1
38-66 Auto A5 DEF/F-EG A) DEF Adblue®
B) Ethylene Glycol °F Protection (freezing point)
0 to 40
30 to -40
0.1
1
+0.2
+1
38-67 Auto Antifreeze C A) Ethylene Glycol °C Protection (freezing point)
B) Propylene Glycol °C Protection (freezing point)
0 to -50
0 to -50
1
1
+1
+1
38-68 Auto Antifreeze F A) Ethylene Glycol °F Protection (freezing point)
B) Propylene Glycol °F Protection (freezing point)
30 to -40
30 to -40
1
1
+1
+1
38-83 Aviation A) Refractive Index (RI)
B) FSII DiEGME ATC
1.33 to 1.42
0.0 to 0.25
0.0001
0.01
+0.0003
+0.02
38-51 Aquatic A) Seawater PPT
B) Seawater SG
0 to 180
1.000 to 1.070
1
0.0005
+1
+0.0010
38-52 Sport A) Urine SG Human (not IVD)
B) Sugar % (°Brix)
1.000 to 1.050
0 to 30
0.0005
0.1
+0.0010
+0.2
38-53 Vet A) Urine SG Small Mammal
B) Urine SG Large Mammal
1.000 to 1.050
1.000 to 1.050
0.0005
0.0001
+0.0010
+0.0010

Automatic Temperature Compensation (ATC): ICUMSA, None or Application Specific (model dependent)
Working Temperature Range: 41-104 °F (5-40 °C)
Sample Temperature Range: 41-194 °F (5-90 °C)
Temperature Sensor Accuracy: +2 °F (41-104 °F) (+1 °C (5-40 °C))
Measurement Time: 2 seconds
Relative Humidity: 95% RH (non condensing)
Battery Power Indicator: Yes
Sample Indicator: High, Low or No sample
IP Rating: IP65 water resistant
Battery Type: 3V 2 x AAA (LR03)
Battery Life Expectation: 10000 readings (minimum)

Prism Material: Optical glass
Prism Seal: Silicon rubber and Viton
Sample Dish: 316 stainless steel
Sample Surface Diameter: 0.3 inch (8 mm)
Sample Volume: 0.01 oz (0.3 ml)
Case Material: Acrylonitrile Butadiene Styrene (ABS)
Dimensions (L/W/H): 4.7x2.2x1.4 inch (12.0x5.5x3.5 cm)
Weight: 3.5 oz (0.1 kg)
Digital Refractometers Options & Prices
Prices listed are for United States and Canada only.  Call or e-mail us for pricing in other countries.
Terms and Conditions

Digital refractometer selection guide

OPTi-Brix 54 Digital Refractometer (PN# 38-02)
Premium single scale refractometer for food, beverage and other measurements requiring the commonly used Brix scale.
Pricing
OPTi-RI 1.42 Digital Refractometer (PN# 38-20)
Premium single scale refractometer for food, beverage and other measurements requiring a refractive index scale.
Pricing
OPTi-General Purpose (ATC) Digital Refractometer (PN# 38-31)
Premium duo scale refractometer, Brix and refractive index scales.
Pricing
OPTi-Chemical C2 Digital Refractometer (PN# 38-37)
Premium duo scale refractometer offering RI measurement without temperature compensation and a second scale showing prism temperature allowing accurate measurement of RI at the specific instrument temperature.  Applications include edible and animal oils, chemicals, pharmaceuticals, industrial fluids, etc..
Pricing
OPTi-Starch 30 Digital Refractometer (PN# 38-22)
Premium single scale refractometer with direct readout of starch concentration in percent.  Applications include use in the textile industry as well as for quality control of certain foodstuff.
Pricing
OPTi-Urea 40 Digital Refractometer (PN# 38-23)
Premium single scale refractometer with direct readout of % Urea in water for use in chemical applications.  Scale data is based on tables within the CRC Handbook of Chemistry and as such is NOT for automotive use.
Pricing
OPTi-Saline 28 Digital Refractometer (PN# 38-28)
Premium single scale refractometer calibrated in % Saline (salt/NaCl) for use within the food and chemical industries.  Please note that the application specific OPTi-Aquarium hand held digital refractometer may be more suitable for use within aquaculture and aqauria.
Pricing
OPTi-Wine AP/Brix Digital Refractometer (PN# 38-41)
Premium duo scale (Mass/AP) refractometer conforms to OMIL (wine payment).
Pricing
OPTi-Wine OE-D Digital Refractometer (PN# 38-42)
Premium duo scale (Mass/Oe-D) refractometer conforms to OMIL (wine payment).
Pricing
OPTi-Wine OE-CH Digital Refractometer (PN# 38-43)
Premium duo scale (Mass/Oe-CH) refractometer conforms to OMIL (wine payment).
Pricing
OPTi-Wine KMW Digital Refractometer (PN# 38-44)
Premium duo scale (Mass/KMW) refractometer conforms to OMIL (wine payment).
Pricing
OPTi-Wine Baumé Digital Refractometer (PN# 38-45)
Premium duo scale (Mass/Baumé) refractometer conforms to OMIL (wine payment).
Pricing
OPTi-Wine Baumé/AP Digital Refractometer (PN# 38-46)
Premium duo scale (Baumé/AP) refractometer.
Pricing
OPTi-ABV Digital Refractometer (PN# 38-47)
Premium duo scale (Mass/ABV) refractometer.  For the determination of final alcohol content of beers, wines, cava and cider, the RI-Zeiss value from the digital refractometer must be entered into a web calculator together with a simultaneous reading of specific gravity by hydrometer.  ABV will be accurate to within +/-0.5% by volume but due to local regulations, may NOT be suitable for duty, customs & excise declaration purposes.  For brewers of beer - choose the OPTi-Brew hand held digital refractometer that has °Plato scale for Wort in stead of standard Brix scale.
Pricing
OPTi-Brew Hand Held Digital Refractometer (PN# 38-49)
Premium duo scale refractometer provides digital measurement with automatic temperature compensation for measurement at both the start of a brew (°Plato of Wort in "the mash") and at the end of fermentation (% alcohol content by volume).  The Wort value in °Plato may require conversion using a table to the commonly used specific gravity value obtained from a glass float hydrometer.  For the determination of final alcohol content, the RI-Zeiss value from the hand held digital refractometer must be entered into a web calculator together with a simultaneous reading of specific gravity by hydrometer.  ABV will be accurate to within +/-0.5% by volume but due to local regulations, may NOT be suitable for duty, customs & excise declaration purposes.
Pricing
OPTi-Heat Transfer PG/C Digital Refractometer (PN# 38-70)
Premium duo scale (PG vol/°C Protect) refractometer.  For use commissioning and maintaining ground-source heat pumps, pasteurisation units in food, beverage and dairy applications, glycol based chiller units used in bars and clubs and air-conditioning units etc.
Pricing
OPTi-Heat Transfer EG/C Digital Refractometer (PN# 38-71)
Premium duo scale (EG vol/°C Protect) refractometer.  For use commissioning and maintaining ground-source heat pumps, pasteurisation units in food, beverage and dairy applications, glycol based chiller units used in bars and clubs and air-conditioning units etc.
Pricing
OPTi-Heat Transfer EG/PG Digital Refractometer (PN# 38-72)
Premium duo scale (% vol) refractometer.  For use commissioning and maintaining ground-source heat pumps, pasteurisation units in food, beverage and dairy applications, glycol based chiller units used in bars and clubs and air-conditioning units etc.
Pricing
OPTi-Heat Transfer EG/F Digital Refractometer (PN# 38-74)
Premium duo scale (EG vol/°F Protect) refractometer.  For use commissioning and maintaining ground-source heat pumps, pasteurisation units in food, beverage and dairy applications, glycol based chiller units used in bars and clubs and air-conditioning units etc.
Pricing
OPTi-Coolant Digital Refractometer (PN# 38-81)
This premium refractometer has two scales - the RI or "reference scale" for high accuracy experimental work used to establish the calibration curve of specific oil/water mixes prior to setting the TARGET of the easy to use Brix scale.
Pricing
OPTi-Auto A1 Digital Refractometer (PN# 38-61)
Premium duo scale (Brix/EG °C Protect) refractometer.
Pricing
OPTi-Auto A2 Digital Refractometer (PN# 38-62)
Premium duo scale (Brix/Adblue®) refractometer.
Pricing
OPTi-Auto A3 Digital Refractometer (PN# 38-63)
Premium duo scale (Brix/PG °C Protect) refractometer.
Pricing
OPTi-Auto A4 DEF/C-EG Digital Refractometer (PN# 38-65)
Premium duo scale (Adblue®/°C Protect) refractometer.  Rapid measurement of critical automotive fluids for fleet managers, freight companies, and garages.
Pricing
OPTi-Auto A5 DEF/F-EG Digital Refractometer (PN# 38-66)
Premium duo scale (Adblue®/°F Protect) refractometer.  Rapid measurement of critical automotive fluids for fleet managers, freight companies, and garages.
Pricing
OPTi-Auto Antifreeze C Digital Refractometer (PN# 38-67)
Premium duo scale (EG/PG °C Protect) refractometer.  Rapid measurement of critical automotive fluids for fleet managers, freight companies, and garages using two different types of glycol as antifreeze.
Pricing
OPTi-Auto Antifreeze F Digital Refractometer (PN# 38-68)
Premium duo scale (EG/PG °F Protect) refractometer.  Rapid measurement of critical automotive fluids for fleet managers, freight companies, and garages using two different types of glycol as antifreeze.
Pricing
OPTi-Aviation Digital Refractometer (PN# 38-83)
Premium duo scale (RI/FSII-ATC) refractometer.
Pricing
OPTi-Aquatic Digital Refractometer (PN# 38-51)
Premium duo scale (PPT/SG) refractometer.  Ideal for aquarium, fish farming (aquaculture), environmental research (salt plain degradation) and eco-industrial coolants.
Pricing
OPTi-Sport Digital Refractometer (PN# 38-52)
Premium hygienic duo scale refractometer!  Unlike optical refractometers, there is no need to handle the sample near face or eyes and only a small amount of urine is needed to take a measurement!  OPTi-Sport digital refractometer - helping to deliver the best from our athletes and sports people.  Monitor both sugar intake from sports drinks (Brix) and the level of hydration (Urine Specific Gravity) during and after the event!  (Not for IVD or clinical/medical assessment use)
Pricing
OPTi-Vet Digital Refractometer (PN# 38-53)
Premium hygienic duo scale refractometer!  Unlike optical refractometers, there is no need to handle the sample near face or eyes and only a small amount of urine is needed to take a measurement!
Pricing
DIGITAL REFRACTOMETER ACCESSORIES
OPTi Digital Refractometer Belt Pouch (PN# 38-016) Pricing
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