The Water Flow Measurement Sensor 1–30 LPM (model YF-S201) is a Hall effect flow sensor with a 0.5 inch inner diameter and 20mm outer diameter, measuring water flow from 1 to 30 litres per minute with ±10% accuracy, operating from 5V to 18V DC (4.5V minimum tested) within -25°C to 80°C, rated for up to 2.0 MPa water pressure with a 50% ±10% duty cycle pulse output at 450 pulses per litre. The flow sensor price for this YF-S201 model reflects its household and RO system-scale flow range — significantly larger than the smaller YF-S401 mini sensor designed for dosing-scale flows under 6 L/min.
The flow sensor yf s201’s 450 pulses-per-litre calibration constant is a precisely specified figure, making volume calculation straightforward — dividing total pulse count by 450 gives litres dispensed directly, without needing separate calibration testing. As a water flow system component, this YF-S201 fits standard 0.5 inch household plumbing, making it the go-to sensor for RO purifier flow monitoring, tap water usage tracking, and irrigation line flow measurement across typical Indian residential plumbing setups. The Water Flow Measurement Sensor 2.0 MPa pressure rating comfortably exceeds typical household mains water pressure.
the Water Flow Sensor ±10% accuracy specification means this sensor is suitable for general flow monitoring and usage tracking but not for precision metering applications requiring tighter tolerances — billing-grade water metering would need a more accurate (and costlier) flow meter. Well-suited for makers, this water flow sensor available at StemVolt enables fluid monitoring, pump control, and IoT projects using precise real-time flow measurement.
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Features:
- 450 pulses per litre — precise documented calibration constant
- 1-30 L/min range suited for household and RO system flow scale
- 0.5 inch standard plumbing fitting for direct household pipe installation
- 2.0 MPa pressure rating exceeds typical residential mains pressure
- -25°C to 80°C wide operating range for indoor and outdoor use
Technical specifications:
Applications:
- YF-S201 used for Arduino RO purifier water usage tracking build
- College project uses flow sensor price for household flow demo
- RO system uses flow sensor yf s201 for India water purifier monitoring
- Irrigation uses water flow system for farm tap usage measurement
- Smart home uses Water Flow Measurement Sensor for tap water consumption alert
Package includes:
- 1 x Water Flow Measurement Sensor 1–30 LPM
Amit Jain –
No damage during transit
Shikha Sharma –
Worth every rupee
Deepak Sharma –
Transparent checkout and after sale support ensured a smooth purchasing experience, while the sensor delivered reliable and consistent flow measurement performance
Vivek Soni –
Product as shown
Alok Sen –
It provides accurate flow rate monitoring and is ideal for engineering projects, water management systems, and arduino-based applications
Barkha Narayan –
Delivery tracked properly
Rani Sharma –
Suitable for water flow systems, automation projects, and educational experiments requiring precise liquid flow monitoring and control.