Digital Refractometer for Salt Water

  • Part #:MW-MA887
  • Weight:420 gram
  • Availability: Inquire

Price: $142.00
Price: $191.70


This optical instrument employs the measurement of the refractive index to determine the salinity of natural and artificial seawater, ocean water or brackish intermediates. Samples are measured after a simple user calibration with distilled or de-ionized water. Within seconds, the refractive index and temperature are measured and converted into one of three popular measurement units; Practical Salinity Units (PSU), Salinity in parts per thousand (ppt), or Specific Gravity (S.G. (20/20). All conversion algorithms are based upon respected scientific publications using the physical properties of seawater (not sodium chloride). The temperature (in °C or °F) is also displayed on the large dual level display along with helpful message codes.   Sodium Chloride Standards are available as an option to validate the calibration of this instrument.



0 to 50 PSU

0 to 150 ppt

1.000 to 1.114 S.G. (20/20)

0 to +80C / 32 to +176F



1 ppt

0.001 S.G. (20/20)



+/- 2PSU

+/- 2 ppt

+/- 0.002 S.G. (20/20)

+/- 0.3C/0.5F

Additional Features & Specifications:

  • Light Source: Yellow LED
  • Measurement Time: 1.5 seconds
  • Minimum sample volume: 100 μL (cover prism totally)
  • Sample Cell: Stainless Steel ring and flint glass prism
  • Automatic Temperature Compensation between +10C and +40C
  • Battery : 1 x 9V AA, 5000 reading battery life
  • Made from ABS plastic
  • Dual-level LCD
  • Easy setup and storage
  • Automatically turns off after 3 minutes of non-use
  • Supplied with battery and instruction manual

Optional Accessories

Part #: SCS-XX
$150.00 (USD)
$202.50 (CAD)
These Sodium Chloride Standards can be used to validate the calibration of your NaCl/Salinity instrumentation.