Gravity Flow Sensor 1/2 Inch

The DFRobot Gravity flow sensor measures how much water flows through a line with a 1/2 inch connection. A rotor with a magnet turns in the plastic housing, and a Hall sensor outputs pulses: 450 pulses correspond to 1 litre. A microcontroller counts the pulses on an interrupt pin and calculates the quantity and flow rate from them.

Recommended Accessories:

• 12V Solenoid Valve DN15 1/2 Inch
• 12V Ball Valve DN15 1/2 Inch
• Water pump JT-280AT 280-600L/h 6-12V

Features:

• Output: square-wave pulses via Hall sensor, 450 pulses per litre
• 3-pin Gravity cable: green signal, red VCC, black GND
• Install vertically, tilted by no more than 5°
• Avoid contact with corrosive chemicals
• Keep the liquid below 100 °C to avoid damage to the sensor (DFRobot states 120 °C as the limit)

Application Examples:

• Monitoring the water cooling of a laser or a spindle
• Measuring irrigation and water consumption
• Recording the flow in coffee machines and water dispensers

Documentation:

• DFRobot Wiki with installation notes and example code

Technical Data:

• Sensor: YF-S201
• Operating voltage: 5 to 12 V DC
• Operating current: 15 mA at 5 V
• Inner diameter: 11 mm
• Outer diameter of connection: 20 mm
• Pressure resistance: below 1.75 MPa
• Flow range: 1 to 30 L/min
• Accuracy: ±5 % (2 to 30 L/min)
• Output pulse at 5 V: high above 4.7 V, low below 0.5 V
• Duty cycle: 50 % ±10 %
• Flow formula: 1 L = 450 pulses
• Insulation resistance: above 100 MΩ
• Humidity: 25 to 95 % RH, no frost
• Liquid temperature range: 1 to 100 °C
• Dimensions: 62 × 36 × 35 mm
• Weight: 50 g

Scope of Delivery:

• 1× Gravity Flow Sensor 1/2 Inch
• 1× Gravity digital connection cable with plug, 30 cm