อุปกรณ์วัด Refractometer (Digital Refractometer for Natural or Artificial Seawater Analysis)
Digital Refractometer for Natural or Artificial Seawater Analysis
HANNA‘s HI?96822 Digital Refractometer is a rugged, portable, water resistant device that utilizes the measurement of the refractive index to determine the salinity of natural and artificial seawater, ocean water or brackish intermediates. The HI?96822 reflects HANNA‘s years of experience as a manufacturer of analytical instruments. This digital refractometer eliminates the uncertainty associated with mechanical refractometers and is durable and compact enough to be used at home, in the lab and out in the field.
The HI 96822 is an optical device that is quick and easy to use. After a simple user calibration with distilled or deionized water, a seawater sample can be introduced into the sample well.
Within seconds, the refractive index and temperature are measured and converted into one of 3 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 Importance of Salinity Measurement Throughout a Variety of Applications
Salinity is a critical measurement in many applications, such as aquaculture, environmental monitoring, aquariums, desalination plants, well water, and many more. Until now, the available technology to measure salinity has relied on mechanical instruments, such as hydrometers and ocular refractometers, or on high-tech conductivity meters. While easy to use, ocular refractometers can be difficult to get a accurate reading from and are highly susceptible to changes in temperature. Hydrometers, though inexpensive, are clumsy and inaccurate. Conductivity meters that convert to salinity can be cost-prohibitive.
The HANNA HI 96822 is the solution to all these issues. It is lightweight, easy to use, cost-efficient, and is extremely accurate. With the ability to read in all the three of the most widely used salinity units (PSU, ppt, and specific gravity), it is the ideal instrument for any application.
Range PSU 0 to 50
ppt 0 to 150
Specific Gravity (20/20) 1.000 to 1.114
Temperature 0 to 80°C (32 to 176°F)
Resolution PSU 1
Specific Gravity (20/20) 0.001
Temperature 0.1°C (0.1°F)
Accuracy (@20°C) PSU ±2
Specific Gravity (20/20) ±0.002
Temperature ±0.3°C (0.5°F)
Temperature Compensation automatic between 10 and 40°C (50 to 104°F)
Measurement Time approximately 1.5 seconds
Volume 100 µL (to cover prism totally)
Light Source yellow LED
Sample Cell stainless steel ring and flint glass prism
Auto-off after three minutes of non-use
Enclosure Rating IP 65
Battery Type /
Battery Life 9V / approximately 5000 readings
Weight 192 x 104 x 69 mm (7.6 x 4.1 x 2.7”) / 420 g (14.8 oz.)