YF-S201C 2Pcs Transparent Flow Sensor Turbine Flowmeter Water Flow Meter DC3.5-24V G1/2 Range 1-30L/min Hall Pulse Output NPN Signal 300 Pulses/Liter 10mA for Water Heaters

Product Description:

This 2-piece set includes YF-S201C transparent water flow sensors designed to detect incoming water flow at a water heater inlet. As water passes through the internal rotor assembly, the magnetic rotor turns with the flow, and the Hall sensor sends a corresponding pulse signal to a controller for flow monitoring and regulation. The transparent valve body helps users observe water flow and rotor conditions.

Core Selling Points:

The compact and lightweight design supports easy installation while keeping the internal flow path visible. The impeller contains stainless steel beads for wear resistance, and the design includes line routing and isolation from water. Suitable applications include water heaters, automatic water dispensers, card readers, and other flow metering equipment.

Technical Specifications:

Model: YF-S201C. Quantity: 2 pieces. Valve body: transparent material. Operating voltage: DC3.5-24V. Current: cannot exceed 10mA. Flow range: 1-30L/min. Frequency formula: F=5 * Q (L/Min) - 3. Error: ±2%. Output: square wave (NPN signal). Pulse output: 300 pulses after flowing a liter of water. Allowable pressure: water pressure below 1.75Mpa. Pin description: Red = IN connected to positive electrode; Yellow = OUT signal output line; Black = GND connected to negative electrode.

Package Contents:

2 x YF-S201C transparent water flow sensors.

Before Purchase:

Confirm that your application uses DC3.5-24V, a current not exceeding 10mA, a 1-30L/min flow range, and the required G1/2 connection. Check that the installation environment keeps water pressure below 1.75Mpa and that the red, yellow, and black wires can be connected as specified. Verify system compatibility before ordering.