Salinity range: 0~9999ppm/10~200ppt or 0.0-25%, ORAPXI salinity tester has automatic temperature compensation function (32°F~140°F), which can reduce the error caused by the change of liquid temperature. Extensive Applications: There are different purposes for the salinity tester. This instrument can not only detect the salt content of edible salt, salt water pool and koi fish pond, but also the salinity of sea water, marine, salt level test salt from the salt water tank. Backlit Design: No need to worry about seeing the displayed value if the light is insufficient. The ORAPXI Salinity Meter features a green backlit LCD display to help you see measurement results clearly in any situation. 4-in-1 Salinity Tester: The multi-parameter tester can test salinity, TDS, EC, and temperature accurately, quickly, and reliably for most regular aqueous solution testing.