Digital Refractometer for Salinity in Aquariums and the Sea of Milwaukee MA887

Refractometers are optical instruments which serve to determine the concentration of certain substances from the angle of refraction of light, when passing through these liquids.
In this case, the Milwaukee range of refractometers will measure the concentration of salt (NaCl) in the marine, brackish or fresh water environment. This procedure is key in controlling water conditions for aquariums and aquaculture .
The concentration can be measured in different units or scales:

• PSU, practical salinity units
• ppt, parts per thousand
• SG, specific gravity

It incorporates automatic temperature compensation , between 10 and 40ºC and temperature measurement in a range of 0 to 80ºC . The resolution in the measurement parameters is 1PSU, 1ppt and 0.001SG . The light source of the refractometer is a yellow LED .

The precision is much higher than in analog optical refractometers, and is located at +/- 2PSU, +/- 2ppt, +/- 0.002 specific gravity and +/- 0.3ºC. The reading is displayed on a practical LCD screen and the equipment incorporates a 9V alkaline battery that reaches 5000 readings.

Characteristics:

• Range:
  

0 to 50 PSU0 to 150 ppt1,000 to 1,114 SG (20/20) 0 to 80 ° C / 32 to 176 ° F

• Resolution:
  

1 PSU1 ppt0.001 SG (20/20) 0.1 ° C / 0.1 ° F

• Precision:
  

± 2 PSU ± 2 ppt ± 0.002 SG (20/20) ± 0.3 ° C / 0.5 ° F

• Yellow LED light source
  
• Measurement time Approx. 1.5 seconds
  
• Minimum sample volume 100 μL (completely cover the prism)
  
• Measuring cell SS ring and prism optical glass
  
• Automatic Temperature Compensation between 10 and 40 ° C (50 to 1004 ° F)
  
• ABS shell material
  
• Battery type 1 x 9V AA (included)
  
• Battery life 5000 readings
  
• Automatic shutdown After 3 minutes without use
  
• Dimensions 192 x 102 x 67 mm
  
• Weight 420 g