YF-B1 Water Flow Sensor - Brass - G1/2"

With this sensor you can easily measure the flow of liquids (water).

The output of the sensor gives 11 pulses per second with a duty cycle of approximately 50% for every liter of liquid that passes through it per minute: Q [L/min] = f_pulse[Hz ]/11.

Specifications:

• Supply voltage: 5-18V DC
• Signal voltage: 4.7V (with 5V DC power supply)
• Connector: JST-SM 3p female
• Pulse frequency per L/min: 11Hz*
• Duty cycle pulse: 50%±10%
• Measuring range: 1-25L/min
• Accuracy: ±3%*
• Water connection: G1/2"
• Maximum water pressure: 17.5bar
• Working temperature: 1-100°C
• Suitable liquids: Water**
• Material: Brass
• Dimensions: See images

Pinout:

• Red: Vcc/plus (supply voltage)
• Black: GND/min
• Yellow: Signal

Package contents:

• 1x YF-B1 Water Flow Sensor - Brass - G1/2"

See the following page for a tutorial with a similar sensor: How to Use Water Flow Sensor - Arduino Tutorial

Modify the following piece of code around line 17:

float calibrationFactor = 4.5;

To:

float calibrationFactor = 11;

*Note: This is a factory specification under specific circumstances. Should the sensor be used in a situation where accuracy is required, it is recommended to calibrate the sensor in that specific setup.

**Note: We cannot provide any warranty when this product is used with any liquid other than clean spring/tap water (non-potable).

Note: The liquid can only flow in one direction, this is indicated by an arrow.