Hall water flow sensor DN15 G1/2 copper flowmeter YF-B1 [inner diameter 15.4 outlet 13.5mm/outer diameter 20.5mm]

Description

The YF-B1 is a Hall-effect turbine water flow sensor featuring a brass housing with G1/2″ (DN15) threaded connections, designed for accurate inline measurement of liquid flow rate and total volume. Unlike the common plastic-bodied YF-S201, the YF-B1’s brass construction offers superior durability, higher pressure resistance, and better suitability for hot water applications such as water heaters and coffee machines .

The sensor operates on a turbine principle: water flowing through the body spins a magnetic rotor, and an integrated Hall-effect sensor detects the rotation, outputting a digital pulse train proportional to flow rate . The pulse frequency follows the relationship F = 11 × Q (Hz, where Q is flow rate in L/min), corresponding to approximately 660 pulses per liter . The rated flow range is 1–25 L/min with ±3% accuracy .

This model is particularly suited for applications requiring a robust, leak-resistant sensor: the brass body withstands up to 1.75 MPa pressure, and the unit is tested to 1.7 MPa for one minute without leakage or deformation . The specified inner diameter dimensions (inlet 15.4mm, outlet 13.5mm, outer 20.5mm) ensure compatibility with standard G1/2 plumbing fittings .

Critical limitations: This is a low-cost, non-certified sensor for hobbyist, educational, and light commercial use. For 3.3V microcontrollers (ESP32, ESP8266), the pulse output amplitude (high level >4.7V at 5V supply) requires a logic level shifter or voltage divider to protect GPIO pins . A filter should be installed upstream to prevent debris from jamming the turbine.

Features

• Brass Housing Construction: Superior durability and heat resistance compared to plastic sensors; suitable for hot water and high-pressure applications .

• Hall-Effect Pulse Output: Digital square wave proportional to flow rate, readable by any microcontroller with an interrupt-capable GPIO .

• G1/2″ (DN15) Threaded Connection: Standard 4-point pipe size for easy integration into water lines .

• Flow Range 1–25 L/min: Suitable for water heaters, coffee machines, water dispensers, and irrigation systems .

• 660 Pulses per Liter: Good resolution for volume tracking and billing applications .

• Wide Voltage Range (DC 5–15V): 5V typical for Arduino; flexible for different power supplies .

• High Pressure Resistance (≤1.75 MPa): Brass body withstands pressures unsuitable for plastic sensors .

• Specified Inner Diameters: Inlet 15.4mm, outlet 13.5mm, outer 20.5mm for precise plumbing compatibility .

Technical Specifications