SEA YF-B1-S-SM G1/2 Inch Stainless Steel Water Flow Sensor G1/2 Inch 3.5 to 24V

Description

The SEA YF-B1-S-SM is a high-performance, industrial-grade G1/2 inch (DN15) stainless steel water flow sensor engineered for reliable and accurate flow measurement in fluid systems. Designed for use in both commercial and industrial environments, this flow sensor integrates a precision turbine impeller and a Hall-effect sensor that generates an NPN pulse signal output, directly proportional to the liquid flow rate.

With an operating voltage range from 3.5V to 24V DC and low working current consumption (<15mA at 5V), it is compatible with most microcontroller platforms like Arduino, Raspberry Pi, STM32, and PLC-based systems. The robust #304 stainless steel body offers excellent corrosion resistance, making it ideal for water purification systems, beverage dispensers, laboratory equipment, and industrial process control setups.

The flow range of 1 to 25 liters per minute (L/min), combined with a maximum pressure capacity of 1.75 MPa, ensures smooth performance even under high-flow or high-pressure conditions. It can operate reliably in temperature environments ranging from -20C to +80C, further enhancing its versatility. Each unit comes with a pre-attached 50cm PVC SM-3P cable, allowing fast integration into your existing setup.

Its compact design and threaded G1/2 inch BSP connections make it easy to install in pipelines or embedded system configurations. Every pulse output from the Hall sensor corresponds to a certain volume of fluid passing through, allowing precise digital counting for total flow volume monitoring or real-time flow control.

---

Applications

• Water heaters
• Beverage vending machines
  
• Water purifiers and RO systems
  
• Smart faucets and dispensers
  
• Industrial automation systems

---

Features

• G1/2 inch BSP threaded stainless steel body (DN15)
  Flow range: 125 L/min with 5% accuracy
  Pulse output: NPN signal ~1077 pulses per litre
  Operating voltage: 3.5V24V DC, low current <15mA
  Compatible with Arduino, Raspberry Pi, STM32, etc.
  Output signal: HIGH >4.7V, LOW <0.5V (at 5V input)
  Max pressure: 1.75 MPa
  Operating temperature: -20C to +80C

---

Comparison Table: Brass vs. Stainless Steel Water Flow Sensors

Feature Brass Stainless Steel Corrosion Resistance Good (for clean/fresh water) Excellent (suitable for harsh fluids) Durability Moderate High Cost Lower (budget-friendly) Higher (premium-grade) Weight Lighter Heavier Application Domestic, general-purpose use Industrial, marine, high-pressure Lifespan Moderate Long-lasting

---

Note: Choosebrass for household or standard water systems. Opt for stainless steel in corrosive, high-pressure, or industrial environments.

---

Specifications

Attribute Details Model YF-B1-S-SM Material 304 Stainless Steel Connection Size G1/2 inch (DN15) Thread Type BSP (British Standard Pipe) Flow Range 1 25 L/min Accuracy 5% Pulse Output Rate ~1077 Pulses/Liter Operating Voltage DC 3.5 24V Operating Current <15mA at 5V Output Signal NPN Pulse High-Level Voltage >4.7V (at 5V input) Low-Level Voltage <0.5V (at 5V input) Max Pressure 1.75 MPa Temperature Range -20C to +80C Cable Type SM-3P PVC Cable Length 50cm Wiring Red: VCC, Black: GND, Yellow: Signal Weight 80g

---

Package Include

1xSEA YF-B1-S-SM G1/2 Inch Stainless Steel Water Flow Sensor G1/2 Inch 3.5 to 24V