Water Flow Sensor YF-S401

This simple flow sensor is very similar to its big brother, the YF-S201, but has been optimized for lower flow rates and features a higher pulse per liter count. Inside the housing, a small pinwheel with an attached magnet is spun by passing water; as the magnet makes each revolution, a hall effect sensor inside the housing outputs a pulse on the yellow wire.

This sensor is best suited for flow rates between 0.3 and 6 liters per minute and outputs 5880 pulses per liter (approximately 1 pulse per 0.17mL). The sensor has a barbed 7mm connection point on each side with an inner diameter of 4mm.

A 6 mm hose is recommended
Avoid unit contact with corrosive chemicals
The unit must be installed vertically, tilted no more than 5 degrees
Liquid temperature should be less than 120 C to avoid damage to unit
Specifications:
Model: YS-S401
Working Voltage: DC 5V~12V
Maximum Working Current: 15mA @ 5V DC
Flow Rate Range: 0.3~6L/min
Inlet Water Pipe Diameter: 4mm
Load Capacity: ≤10mA (DC 5V)
Water Pressure: ≤0.8MPa

Size:

Connections:

• Red: Power In
• Black: Ground
• Yellow: Signal Output

Applications:

• Water heaters
• Water vending machine
• Flow measurement device
• Automatic water dispenser
• Agriculture
• Food processing
• Coffee/Tea makers
• Water Management