Precalibrated at 3000 ppm salt (NaCl) at 25°C / 77°F
Built-in atc sensor for automatic temperature compensation; built-in salt (Nacl) conversion factor for meter calibration
Salt range: 0-10000 ppm or 0.0-0.5 %;
Temperature range: 0 -55 °c or 32-130 °f;
Waterproof rating: IP65
Works only for salt water pool and koi fish pond salt level testing.
Will not work for sea/marine/salt water fish tank salt level testing
Will not work for food salt level testing!
Will not work for any other application!