Refractometers

A refractometer is a laboratory or field instrument used for measuring concentrations of aqueous solutions. It requires only a few drops of liquid and is used as throughout the food, agricultural, chemical, and manufacturing industries.
Refractometers measure the degree to which light changes direction, called the angle of refraction. A refractometer takes the refraction angles and correlates them to refractive index (nD) values that have been established. Using these values, you can determine the concentrations of solutions.

Types of refractometers
  • Hand refractometer facilitate convenient and rapid measurement of concentration in a number of liquid and semi-solid samples. It works on critical angle principle in which lenses and prisms project a shadow line onto a small glass reticule inside the instrument, which is then viewed through a magnifying eyepiece.
  • Digital refractometers operate on the same critical angle principle as a handheld refractometer. The difference is that light from an LED is focused on the underside or a prism element. When a liquid sample is applied to the measuring surface of the prism, some of the light is transmitted through the solution and lost, while the remaining light is reflected onto an array of photodiodes creating a shadow line. Once the position of the shadow line has been automatically determined by the instrument, the internal software will correlate the position to refractive index and display a digital readout.

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Viewing 1 - 19 of 19 products
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Description Price Refractometer Type Maximum Measurement Minimum Measurement Best Accuracy Resolution Measurement Time Type Battery Type Battery Life Power Source Dimensions Weight Height Length
RS Stock No. 899-8015
Mfr. Part No.ORA 1UA
BrandKern
£96.38
Each
Units
Industry / Automotive 40% 0% - - - Analogue - - - - - - -
RS Stock No. 899-8025
Mfr. Part No.ORA 4FA
BrandKern
£96.38
Each
Units
Industry / Automotive - - - - - Analogue - - - - - - -
RS Stock No. 899-8034
Mfr. Part No.ORA 4RR
BrandKern
£96.38
Each
Units
Expert applications - - - - - Analogue - - - - - - -
RS Stock No. 899-8028
Mfr. Part No.ORA 32BA
BrandKern
£96.38
Each
Units
Sugar 32% 0% - - - Analogue - - - - - - -
RS Stock No. 899-8031
Mfr. Part No.ORA 80BB
BrandKern
£90.72
Each
Units
Sugar 80% 0% - - - Analogue - - - - - - -
RS Stock No. 899-8037
Mfr. Part No.ORA 4UA
BrandKern
£96.38
Each
Units
Industry / Automotive 35% 30% - - - Analogue - - - - - - -
RS Stock No. 899-8021
Mfr. Part No.ORA 3SA
BrandKern
£96.38
Each
Units
Salt 28% 0% - - - Analogue - - - - - - -
RS Stock No. 899-8019
Mfr. Part No.ORA 20BA
BrandKern
£96.38
Each
Units
Sugar 20% 0% - - - Analogue - - - - - - -
RS Stock No. 899-8012
Mfr. Part No.ORA 1SA
BrandKern
£96.38
Each
Units
Salt 100% 0% - - - Analogue - - - - - - -
RS Stock No. 181-1153
Mfr. Part No.ORF 45BM
BrandKern
£303.32
Each
Units
Sugar 1.4098 (Refractive Index) nD, 45 (Brix) % 0 (Brix) %, 1.3330 (Refractive Index) nD ±0.0003 (Refractive Index) nD, ±0.2 (Brix) % - - Digital AAA - Battery 133 x 65 x 38mm 200g 38mm 133mm
RS Stock No. 136-3534
Mfr. Part No.ORT 1RS
BrandKern
£633.66
Each
Units
- 1.7 nD, 95 % 0 %, 1.3 nD ±0.0002 nD, ±0.1 % ±0.0005 nD, ±0.25 % - Digital/Optical - - - 180 x 90 x 240mm 2kg 240mm 180mm
RS Stock No. 181-1151
Mfr. Part No.ORF 2WM
BrandKern
£303.32
Each
Units
- 150 (Oechsle) °Oe, 22 (Vol. AP) %, 25 (KMW) °KMW, 35 (Mass SW) % 0 (KMW) °KMW, 0 (Mass SW) %, 0 (Oechsle) °Oe, 0 (Vol. AP) % ± 0.2 (KMW) °KMW, ±0.2 (Mass SW) %, ±0.2 (Vol. AP) %, ±1 (Oechsle) °Oe - - Digital AAA - Battery 133 x 65 x 38mm 200g 38mm 133mm
RS Stock No. 181-1147
Mfr. Part No.ORF 1PM
BrandKern
£303.32
Each
Units
- 1.050 (Urine) sgU, 1.3900 (Refractive Index) nD, 12 (Serum Protein) g/dL 0 (Serum Protein) g/dL, 1.000 (Urine) sgU, 1.3330 (Refractive Index) nD ±0.0003 (Refractive Index) nD, ±0.001 (Urine) sgU, ±0.1 (Serum Protein) g/dL - - Digital AAA - Battery 133 x 65 x 38mm 200g 38mm 133mm
RS Stock No. 181-1154
Mfr. Part No.ORF 5UM
BrandKern
£303.32
Each
Units
- 0 (CW) °C, 0 (EG) °C, 0 (PG) °C, 40 (Urea) % 0 (Urea) %, -40 (CW) °C, -50 (EG) °C, -50 (PG) °C ±0.2 (Urea) %, ±0.5 (CW) °C, ±0.5 (EG) °C, ±0.5 (PG) °C - - Digital AAA - Battery 133 x 65 x 38mm 200g 38mm 133mm
RS Stock No. 181-1152
Mfr. Part No.ORF 3SM
BrandKern
£303.32
Each
Units
Salt 1.4100 (Refractive Index) nD, 28 (Salt (NaCl)) %, 45 (Brix) % 0 (Salt (NaCl)) %, 0 (Brix) %, 1.3330 (Refractive Index) nD ±0.0003 (Refractive Index) nD, ±0.2 (Brix) %, ±0.2 (Salt (NaCl)) % - - Digital AAA - Battery 133 x 65 x 38mm 200g 38mm 133mm
RS Stock No. 181-1150
Mfr. Part No.ORF 2UM
BrandKern
£303.32
Each
Units
- 0 (CW) °C, 0 (EG) °C, 0 (PG) °C, 1.50 (BF) kg/L 1.00 (BF) kg/L, -40 (CW) °C, -50 (PG) °C, -50 (EG) °C ±0.01 (BF) kg/L, ±0.5 (CW) °C, ±0.5 (EG) °C, ±0.5 (PG) °C - - Digital AAA - Battery 133 x 65 x 38mm 200g 38mm 133mm
RS Stock No. 181-1149
Mfr. Part No.ORF 1RS
BrandKern
£383.60
Each
Units
Salt - - ±0.0005 (Refractive Index) nD - - Digital AAA - Battery 133 x 65 x 38mm 200g 38mm 133mm
RS Stock No. 136-3530
Mfr. Part No.ORA 6HA
BrandKern
£91.17
Each
Units
- 30% 12% - 0.1 % - Digital/Optical Rechargeable Battery - Battery 130 (Dia.) x 200mm 140g - 200mm
RS Stock No. 181-1155
Mfr. Part No.ORF 85BM
BrandKern
£352.38
Each
Units
Sugar 1.5100 (Refractive Index) nD, 85 (Brix) % 0 (Brix) %, 1.3330 (Refractive Index) nD ±0.0003 (Refractive Index) nD, ±0.2 (Brix) % - - Digital AAA - Battery 133 x 65 x 38mm 200g 38mm 133mm