Gravity Flow Sensor 1/8 Inch

The Gravity flow sensor from DFRobot measures how much water flows through a thin hose with a 1/8 inch connection. Inside the plastic housing a rotor with a magnet turns, and a Hall sensor outputs pulses: 5880 pulses correspond to 1 litre. A microcontroller counts the pulses on an interrupt pin and calculates quantity and flow rate from them.

Recommended Accessories:

• Micro Water Pump Horizontal 100L/h 3-6V with Hose
• Micro Water Pump 120L/h 2.5-6V

Features:

• Output: square-wave pulses via Hall sensor, 5880 pulses per litre
• Connection cable fixed to the sensor, 3-pin: 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

Application Examples:

• Measuring the flow in coffee machines and water dispensers
• Monitoring the water cooling of a laser or spindle
• Measuring small quantities of water for irrigation

Documentation:

• DFRobot Wiki with pinout and example code

Technical Data:

• Sensor: YF-S401
• Operating voltage: 5 to 12 V DC
• Operating current: 15 mA at 5 V
• Inner diameter: 4 mm
• Outer diameter of connection: 7 mm
• Pressure resistance: below 0.8 MPa
• Flow range: 0.3 to 6 L/min
• Accuracy: ±5 % (0.3 to 3 L/min)
• Output pulse at 5 V: high above 4.5 V, low below 0.5 V
• Duty cycle: 50 % ±10 %
• Flow formula: 1 L = 5880 pulses
• Insulation resistance: above 100 MΩ
• Humidity: 35 to 90 % RH, no frost
• Liquid temperature range: 1 to 100 °C
• Dimensions: 58 × 35 × 26 mm
• Weight: 30 g

Scope of Delivery:

• 1× Gravity Flow Sensor 1/8 Inch