
YF-S201 Hall Effect Water Flow Meter / Sensor
The YF-S201 Hall Effect Water Flow Meter is a compact inline sensor that converts water movement into a clean pulse train your microcontroller can count, making liquid measurement surprisingly affordable in Bangladesh. A small turbine spins inside the G1/2 inch body and each turn trips a hall effect switch, producing roughly 450 pulses per litre that an Arduino translates into litres per minute. It is a favourite for smart irrigation controllers, water dispensers, RO purifier monitors, rainwater tanks and DIY flow experiments, and the YF-S201 price in Bangladesh suits student budgets as well as commercial prototypes. The sealed plastic housing and corrosion-resistant rotor handle long watering sessions without complaint. Buy YF-S201 Hall Effect Water Flow Meter / Sensor in Bangladesh from Tekko and bring accurate flow data to your next IoT or robotics project.
Key Features:
• Hall effect pulse output: F(Hz) = 7.5 × Q(L/min), about 450 pulses per litre
• Measures flows from roughly 1 to 30 litres per minute
• G1/2 inch male thread fits standard taps, pipes and garden fittings
• Simple three-wire hookup: red VCC, black GND, yellow pulse signal
• Reads directly on Arduino interrupt pins, ESP32 counters, STM32 and Raspberry Pi
• Sealed body tolerates water up to 80°C and pressure up to 1.75 MPa
• Compact inline housing with about 15 cm of pre-attached lead wire
Not sure it will work? Test your circuit free in Tekko Sim — on your phone, in Bangla or English.
| Category | Sensors |
| Model no. | YF-S201 |
| Availability | In stock |
| In stock | 5 pcs |
| Delivery | Cash on Delivery, nationwide Bangladesh |
| Model | YF-S201 |
| Sensing Element | Hall effect sensor with plastic turbine rotor |
| Supply Voltage | DC 4.5 V to 18 V (5 V typical) |
| Working Current | approx. 15 mA at 5 V |
| Output Signal | Pulse square wave, TTL compatible; F(Hz) = 7.5 × Q(L/min) |
| Pulse Rate | approx. 450 pulses per litre |
| Flow Range | approx. 1 to 30 L/min |
| Thread | G1/2 male thread (outer) |
| Working Pressure | up to 1.75 MPa |
| Medium Temperature | up to 80°C, non-freezing water |
| Wires | Red = VCC, Black = GND, Yellow = Signal, approx. 15 cm leads |
| Insulation Resistance | > 100 MΩ (500 V DC) |
| Dimensions | approx. 58 × 35 × 26 mm (L × W × H) |
| Weight | approx. 43 g |