describe:water analysis penA water measuring pen, to take care of the health of the whole family, to take care of the health of the service, to measure water; to take care of the health of pregnant women, to measure water; to take care of the babys health, to measure water; to take care of your own health, to measure water; measuring range, domestic water, aquatic plant breeding, agricultural land irrigation water, family fish farming, swimming pool, water quality water purifier, business water; Factors affecting water measurement: water at high temperatures cannot be measured and water bodies with a relatively large slosh cannot be measured. Due to the differences in pipelines and water sources in each region and city, the TDS is different,Product Use Range:Detect if the quality of tap water, purified water and mineral water meets national drinking water standards: tap water below 300ppm, pure water below 50ppm (national standard) and mineral water between 100 and 200ppm. Packaging: Water quality test pen * 1