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 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 refractometer

Hand refractometers

Hand refractometers 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

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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RS-artikelnummer 877-1781
VarumärkeRS PRO
1 997,96 kr
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Mix Cutting Fluids 18% 0% ±0.1 % 0.1 %Brix - - - - - 96 x 60 x 230mm 525g 60mm 230mm
RS-artikelnummer 210-7487
VarumärkeRS PRO
2 462,50 kr
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Sugar 53% 0% ±0.2 % 0.1 % 3s Digital 4 x AAA Battery - Battery 148 x 78 x 50 mm 250g 50mm 148mm
RS-artikelnummer 899-8028
Tillv. art.nrORA 32BA
VarumärkeKern
938,17 kr
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Sugar 32% 0% - - - Analogue - - - - - - -
RS-artikelnummer 667-2159
Tillv. art.nrHI 96801
VarumärkeHanna Instruments
2 262,63 kr
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Sucrose +80 °C, 85 %Brix 0 %Brix, 0 °C ±0.2 %Brix 0.1 %Brix, 0.1 °C 1.5s Digital/Optical 9V 5000 Tests Battery 192 x 104 x 69mm 420g 69mm 192mm
RS-artikelnummer 181-1155
Tillv. art.nrORF 85BM
VarumärkeKern
4 359,71 kr
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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
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RS-artikelnummer 236-0555
Tillv. art.nr780BPF
VarumärkeFacom
1 343,01 kr
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Industry / Automotive - - - - - - - - - - - - -
RS-artikelnummer 899-8021
Tillv. art.nrORA 3SA
VarumärkeKern
938,17 kr
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Salt 28% 0% - - - Analogue - - - - - - -
RS-artikelnummer 344-5507
Tillv. art.nr300003
VarumärkeInstruments Direct
3 598,14 kr
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Sugar 80% 0% ±1 % 1 % - Optical - - - 1-1/2 (Dia.) x 7mm 538.6g - 7in
RS-artikelnummer 136-3530
Tillv. art.nrORA 6HA
VarumärkeKern
1 103,72 kr
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- 30% 12% - 0.1 % - Digital/Optical Rechargeable Battery - Battery 130 (Dia.) x 200mm 140g - 200mm
RS-artikelnummer 181-1151
Tillv. art.nrORF 2WM
VarumärkeKern
3 752,66 kr
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- 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-artikelnummer 899-8037
Tillv. art.nrORA 4UA
VarumärkeKern
938,17 kr
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Industry / Automotive 35% 30% - - - Analogue - - - - - - -
RS-artikelnummer 899-8015
Tillv. art.nrORA 1UA
VarumärkeKern
938,17 kr
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Industry / Automotive 40% 0% - - - Analogue - - - - - - -
RS-artikelnummer 181-1154
Tillv. art.nrORF 5UM
VarumärkeKern
3 752,66 kr
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- 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-artikelnummer 344-5484
Tillv. art.nr300001
VarumärkeInstruments Direct
3 686,44 kr
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Sugar 32% 0% ±0.2 % 0.2 % - Optical - - - 1-1/2 (Dia.) x 6-3/4mm 170.1g - 6-3/4in
RS-artikelnummer 181-1152
Tillv. art.nrORF 3SM
VarumärkeKern
3 752,66 kr
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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-artikelnummer 136-3534
Tillv. art.nrORT 1RS
VarumärkeKern
7 615,70 kr
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- 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
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RS-artikelnummer 241-6482
Tillv. art.nrORL-B
VarumärkeKern
8 609,05 kr
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Sugar 212.7% 0% 0.1 % 0.1 %, 0.0001 % - - - - - - - - -
RS-artikelnummer 899-8025
Tillv. art.nrORA 4FA
VarumärkeKern
938,17 kr
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RS-artikelnummer 899-8034
Tillv. art.nrORA 4RR
VarumärkeKern
938,17 kr
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Expert applications - - - - - Analogue - - - - - - -
RS-artikelnummer 344-5535
Tillv. art.nr300006
VarumärkeInstruments Direct
3 311,17 kr
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Salt 28% 0% ±0.2 % 0.2 % - Optical - - - 1-1/2 (Dia.) x 6-3/4mm 184.3g - 6-3/4in