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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Omschrijving Prijs Refractometer Type Maximum Measurement Minimum Measurement Best Accuracy Resolution Measurement Time Type Battery Type Battery Life Power Source Dimensions Weight Height Length
RS-stocknr. 136-3530
FabrikantnummerORA 6HA
FabrikantKern
112,50 €
Each
Aantal stuks
- 30% 12% - 0.1 % - Digital/Optical Rechargeable Battery - Battery 130 (Dia.) x 200mm 140g - 200mm
RS-stocknr. 899-8012
FabrikantnummerORA 1SA
FabrikantKern
85,00 €
Each
Aantal stuks
Salt 100% 0% - - - Analogue - - - - - - -
RS-stocknr. 344-5535
Fabrikantnummer300006
300,00 €
Each
Aantal stuks
Salt 28% 0% ±0.2 % 0.2 % - Optical - - - 1-1/2 (Dia.) x 6-3/4mm 184.3g - 6-3/4in
RS-stocknr. 899-8025
FabrikantnummerORA 4FA
FabrikantKern
85,00 €
Each
Aantal stuks
Industry / Automotive - - - - - Analogue - - - - - - -
RS-stocknr. 181-1154
FabrikantnummerORF 5UM
FabrikantKern
340,00 €
Each
Aantal stuks
- 0 (CW) °C, 0 (EG) °C, 0 (PG) °C, 40 (Urea) % -50 (EG) °C, -50 (PG) °C, -40 (CW) °C, 0 (Urea) % ±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-stocknr. 181-1153
FabrikantnummerORF 45BM
FabrikantKern
340,00 €
Each
Aantal stuks
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