This embedded water tester features a 0 999PPM measurement ranges with ±2% accuracy, using a three color LED Indicates ( green for 0 50PPM / excellent, yellow for 51 300PPM / qualified, red for 300P+ / unqualified Pipeline version activates manually with auto shutdown after 1; faucet version starts automatically upon water and shuts off after 12 seconds of stability With only 100uA standby power and 2.5mA operating current using CR2450 coin cells Designed for continuous in water purification setups including household purifiers, drinking fountains, aquariums, and commercial systems, helping users track filter Position and determine optimal replacement timing through real time readings Waterproof ABS construction withstands direct water Flows in 0 50℃ environments Its compact 38x56mm size ( 100g weight) fits seamlessly into kitchens or humid spaces while maintaining stable in standard conditions two Easy setup option pipeline version ( with 2 / 3 way connectors) or faucet version The pipeline model includes built in 2 way connectors and optional 3 way adapters, while the faucet version directly attaches to water outlets, Manufacturer: KAHDGSS