Usage: open the pen cover and insert it into the water and click the function button

The products are packaged in leather cases, available in yellow or white.

Product weight: 58g (with leather cover)

Application: pure water production and drinking water, electricity transfer liquid, boiler water, fish tank water, swimming pool water cleanliness, photo washing liquid, well water, deep well water, laboratory, aquaculture, food processing, home, office, physics and chemistry teaching, ionized water cosmetics, municipal water supply, travel health care.