Digital Refractometer for Seawater Analysis HI96822 Hanna Instruments
Making a Standard Solution
Sodium Chloride solutions can be used to check the accuracy of the meter. The table below lists two Sodium Chloride solutions and their expected ppt Seawater value.
To make a Standard NaCl Solution (g/100 g), follow the procedure below
Place container ( such as a glass vial or dropper bottle that has a cover ) on an analytical balance.
Tare the balance.
To make an X NaCl solution weigh out X grams of high purity dried Sodium Chloride ( CAS #: 7647-14-5 : MW 58.44 ) directly into the container.
Add distilled or deionized water to the beaker so the total weight of the solution is 100g.
Example Standard NaCl solution :
NaCl ( g )
Water ( g )
Expected Seawater value ( ppt )
3.5 % NaCl
10 % NaCl
Salinity Content Range
0 to 50 PSU; 0 to 150 ppt; 1.000 to 1.114 Specific Gravity ( 20/20 )
Salinity Content Resolution
1 PSU; 1 ppt; 0.001 Specific Gravity ( 20/20 )
Salinity Content Accuracy ( @20 ºC/68 ºF )
±2 PSU; ±2 ppt; ±0.002 Specific Gravity ( 20/20 )
0 to 80 °C ( 32 to 176 °F )
0.1 °C ( 0.1 °F )
±0.3 °C ( ±0.5 °F )
automatic between 0 and 40 °C ( 32 to 104 °F )
approximately 1.5 seconds
Minimum Sample Volume
100 μL ( to cover prism totally )
Stainless steel ring and flint glass prism
After three minutes of inactivity
Battery Type / Life
9 V / approximately 5000 readings
Dimensions / Weight
192 x 102 x 67 mm ( 7.6 x 4.01 x 2.6” ) / 420 g ( 14.8 oz.)
HI96822 is supplied with battery and instruction manual