SALT- For saltwater pool, hot tubs, spas, koi fish pond, salt water fish tank, sea fish, marine fishkeeping aquarium, agricultural, etc.
SG- Specific gravity range:1.000 ~1.070; For aquariums and marine applications.
EC- General uses include hydroponic system, Indoor plant grow and growing tent.
TDS- For drinking water, tap, well, RO/DI system.
TEMP- Automatic Temperature Compensation (ATC) provides consistent reading regardless of any fluctuations in temperature(32°F~140°F). When the ambient temperature is too low, it is recommended to put the tester in the tested liquid wait for a while, and the reading will be more accurate.
°C/°F conversion- The meter has two temperature units °C and ℉. Press HOLD/TEMP button for 5 seconds to convert.