SKU : P02004 That constant frequency calculation = 7.5 * Unit Flow (L / min) * Time (seconds) Flow range: 1-30L / min Scope: Suitable for water heaters, water vending machines, and other flow measurement devices! Technical Parameter 1, the lowest rated voltage DC4.5 5V-24V 2, the maximum operating current 15 mA (DC 5V) 3, the operating voltage range DC 5 ~ 18 V 4, load capacity 10 mA (DC 5V) 5, temperature range 80 6. Operating humidity range 35% ~ 90% RH (no condensation state) 7, allowing pressure The following pressure 1.75Mpa 8, storage temperature -25 ~ + 80 9, storage humidity 25% ~ 95% RH