Engineered for high-pressure industrial fluid networks, the SAIER SEN-HZ21NB inline water flow sensor features a heavy-duty, straight-through hexagonal brass body with standard G1/2 (or NPT1/2) threads. Operating safely at pressures up to 1.75MPa, it accurately meters flow rates from 1 to 30 L/min and supports omnidirectional installation. The integrated Hall-effect module delivers a stable NPN pulse signal directly to your PLC or microcontroller. For seamless electrical integration, the sensor utilizes a strict three-wire harness (Red for VCC, Black for GND, Yellow for Signal OUT) to prevent wiring faults in complex control panels.