Refractometer : MA887 Digital Refractometer untuk Pengukuran Air Laut

Digital Refractometer MA887 adalah instrument optikal untuk mengukur salinitas alami dan buatan pada air laut . (catatan salinitas : kadar garam atau garam terlarut dalam air seperti : sodium chloride, magnesium and calcium sulfates,dan bicarbonates)

Digital Refractometer
Digital Refractometer

Fitur utama meliputi:
• Waterproof models offers IP65 waterproof protection
• Automatic Temperature Compensation (ATC)
• Battery operation with Low Power indicator
• Automatically turns off after 3 minutes of non-use.

Spesifikasi :
Range 0 to 50 PSU
0 to 150 ppt
1.000 to 1.114 S.G. (20/20)
0 to 80°C / 32 to 175°F

Resolution  1 PSU
        1 ppt
        0.001 S.G. (20/20)
         0.1°C / 0.1°F

Accuracy  ±2 PSU
 ±2 ppt
 ±0.002 S.G. (20/20)
 ±0.3°C / ±0.5°F
Light Source  Yellow LED
Measurements Time  Approximately 1.5 seconds
Minimum Sample Volume 100 ┬ÁL (cover prism totally)
Sample Cell SS ring and flint glass prism
Temperature Compensation Automatic between 10 and 40°C / 50 to 104°F
Case Material ABS
Enclosure Rating  IP 65
Battery Type 1 x 9V AA (included)
Battery Life 5000 reading
Auto-shut off  after 3 minutes of non-use
Dimensions 192 x 102 x 67 mm

The MA887 is an optical instrument that employs the measurement of the refractive index to determine the salinity of natural and artificial seawater, ocean water or brackish intermediates.
The digital refractometer eliminates the uncertainty associated with mechanical refractometers and is easily portable for ship, shore or home use.

The MA887 refractometer is an optical device that is simple and quick to use. Samples are measured after a simple user calibration with distilled or deionized 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.

Note :
Salinity is the saltiness or dissolved salt content (such as sodium chloride, magnesium and calcium sulfates, and bicarbonates) of a body of water