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Digital refractometer

Product family: ORM-SW

Digital measurement of refraction index for universal application


Refractometer type Handheld refractometer
Scale - Display type Digital
Area of application Salt
Measuring method Total reflection
Automatic temperature compensation (ATC)
Measurement temperature (°C) 0 °C – 40 °C
Skala Salzgehalt Meerwasser
Measuring range salinity of sea water 0 ‰ – 100 ‰
Teilung Salzgehalt Meerwasser 1 ‰
Toleranz Salzgehalt Meerwasser ±2 ‰
Scale for chlorine content of seawater
Measuring range chlorine content of seawater 0 ‰ – 57 ‰
Teilung Chlorgehalt Meerwasser 1 ‰
Toleranz Chlorgehalt Meerwasser ±2 ‰
Skala Salzgehalt (spez. Gewicht)
Measuring range salinity (spec. weight) 1,000 – 1,070
Teilung Salzgehalt (spez. Gewicht) 0,001
Toleranz Salzgehalt (spez. Gewicht) ±0,002
Brix scale
Measuring range Brix 0 % – 50 %
Readout Brix 0,1 %
Accuracy Brix ±0,2 %
Scale for Refractive index
Measuring range refractive index 1,3330 nD – 1,4200 nD
Readout refractive index 0,0001 nD
Toleranz Brechungsindex ±0,0003 nD
IP protection - complete device IP65
Dimension (W×D×H) 121×58×25 mm
Product family ORM-SW
€ 370,00 *
*plus shipping costs (not applicable for downloads), plus VAT
Available from stock
Compare Technical data sheet Product brochure

Do you have questions? Please get in contact +49 7433 9933-0 or info@kern-sohn.com. For technical questions please contact:

Ralf Gutbrod
Ralf Gutbrod
Category Manager - Optics, Team Leader - Technical Sales
Tel.: +49 7433 9933-306


Automatic temperature compensation
IP65 dust and spray protection
Battery operation


  • The KERN ORM refractometers are accurate and universal maintenance free digital handheld refractometers
  • The typical and practical design is suitable for a quick and convenient everyday use and is characterized by its easy-using and robustness
  • With their handy design, they are ideal for convenient and rapid everyday use
  • The large, easy-to-read display with integrated temperature display supports the user to reliably determine the measurement
  • The integrated automatic temperature compensation (ATC), avoids the manual conversion of the measurement. This allows a quick and efficient usage of the instrument
  • A quick and user-friendly calibration of the refractometer is possible at any time using commercially available distilled water
  • The refractometers of the KERN ORM series are protected against dust and splash water according to the international protection class IP65. You can rinse the refractometer under running water after use
  • Mean value measurements possible
  • Included with the delivery:
    - prism cover
    - pipette
    - storage box
    - 1 × AAA battery
    - user instruction
  • This model is particularly suitable for the measurement of the content of salt and chlorine in seawater. Alternatively the display can be switched to show Brix or the refractive index.
  • The main scope of applications is:
    - Fisch farm
    - Aquaristic


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