YF-S201 Water Flow Sensor
—The YF-S201 is a water flow sensor with a turbine and Hall-effect pickup that outputs pulses proportional to flow rate through a half-inch line.
Specifications
- Flow range roughly 1-30 litres per minute
- 1/2 inch threaded fittings
- Pulse output — count pulses to get volume
- 5-18V supply
- About 450 pulses per litre (calibrate for accuracy)
What you can build with the YF-S201 Water Flow Sensor
- Water usage monitoring on a tank or supply
- Irrigation and dosing control
- Rainwater harvesting logging
- Detecting leaks by unexpected overnight flow
Compatibility
Works with Arduino, ESP32, Pico and Raspberry Pi using an interrupt pin to count pulses. Calibrate against a measured container — the nominal pulse rate varies noticeably between units.
Shipping
Dispatched from New Zealand with courier delivery nationwide, including rural addresses. Prices are in New Zealand dollars.
Availability: Sold out
The YF-S201 is a water flow sensor with a turbine and Hall-effect pickup that outputs pulses proportional to flow rate through a half-inch line.
Specifications
- Flow range roughly 1-30 litres per minute
- 1/2 inch threaded fittings
- Pulse output — count pulses to get volume
- 5-18V supply
- About 450 pulses per litre (calibrate for accuracy)
What you can build with the YF-S201 Water Flow Sensor
- Water usage monitoring on a tank or supply
- Irrigation and dosing control
- Rainwater harvesting logging
- Detecting leaks by unexpected overnight flow
Compatibility
Works with Arduino, ESP32, Pico and Raspberry Pi using an interrupt pin to count pulses. Calibrate against a measured container — the nominal pulse rate varies noticeably between units.
Shipping
Dispatched from New Zealand with courier delivery nationwide, including rural addresses. Prices are in New Zealand dollars.