Feature:1. Flows Counter Sensor: Designed to have wide flows measuring of 0.2‑8L/MIN, the flowmeter also has high measurement accuracy.2. Reliable Work: Waterproof design together with Hall component ensures stable working performance with high efficiency.3. Practical Use: Not only works perfectly as a water flows sensor, but also can be applied as a flows switch on heater.4. Good Material: Combining premium POM material with stainless steel shaft in the impeller, very durable with wearing.5. Easy to Install: Red line connects to positive pole, black line connects to negative pole, and yellow line connects to pulse signal.Specification:Item Type: Water Meter SensorMaterial: POMInterface Size: 1/4inVoltage Range: DC 3.5-24VFlows Range: 0.2-8L/minPulse Frequency: F=(20 x Q)±5%Withstand Voltage: ≤1.75mapOutput Pulse High Level: ≥DC4.6V (input voltage DC5V)Output Pulse Low Level: ≤DC0.5V (input voltage DC5V)Maximum Operating Current: 15mA (DC5V)Operating Temperature Range: ≤80℃ Package List:1 x Water Flow Meter SensorNote:1. The installation should follow the flows direction on the back of the product, otherwise there will be no signal output. 2. A filter must be installed at the entrance of the sensor to prevent particles and debris from entering the sensor.