SEA YF-B1-S-SM G1/2 Inch Stainless Steel Water Flow Sensor G1/2 Inch 3.5 to 24V
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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 -20°C to +80°C, 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: 1–25 L/min with ±5% accuracy
• Pulse output: NPN signal ~1077 pulses per litre
• Operating voltage: 3.5V–24V 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: -20°C to +80°C
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: Choose brass 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 | -20°C to +80°C |
| 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