DFRobot Gravity Liquid Flow Sensor (G1/2)


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SKU: 1356254
  1. Brand: DFRobot
  2. Product: DFRobot Gravity Liquid Flow Sensor (G1/2)
  3. Operating Voltage: DC3.5~24V
  4. Operating Current: ≤10mA (DC5V)
  5. Output Mode: NPN pulse signal



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Brand: DF Robot
Category: Water TDS, pH, Flow, Level and Pressure Sensor

This Gravity: Liquid Flow Sensor is designed based on the electromagnetic principle. It adopts an O-ring rubber seal and uses silicone sealant at the outlet end to ensure good waterproofness. Also, it embraces high anti-electromagnetic interference and anti-vibration capabilities, offering reliable performance and long service life. The sensor can be used with microcontrollers like ARDUINO UNO to measure the flow of liquids with high concentration and low viscosity like water, diesel, engine oil, milk, paint, detergent, honey, etc. (no impurity in liquid)

Use this flow sensor to measure the rate of the flow of liquids. The sensor has a digital interface which makes it simple and easy to connect it to a microcontroller, Arduino, or Raspberry Pi. It requires no extra circuit to start measuring the liquid flow rate. The sensor will have to be attached in the liquid line whose flow is to be measured. A pinwheel inside the sensor moves as the liquid flows through the sensor.


  1. Gravity interface, easy to wire
  2. The wide voltage of 3.5~24V
  3. Measure the flow of the high-concentration but low-viscosity liquid
  4. RoHS compliant

Package Includes:

1 x DFRobot Gravity Liquid Flow Sensor (G1/2)

Operating Voltage

DC 3.5~24V

Operating Current

≤10mA (DC5V)

Output Mode

NPN pulse signal

Pipe Diameter


Thread I.D


Thread O.D


Thread Length


Water Pressure Resistance


Insulation Resistance


Flow Range



±1% (5-600L/H)

Output Pulse High Level

>DC4.7V (input voltage DC5V)

Output Pulse Low Level

<DC0.5V (input voltage DC5V)

Output Pulse Duty Ratio


Flow & Pulse Correlation

1L=150 pulses

Operating Temperature


Operating Humidity

35%~90%RH (No condensing)

Storage Temperature


Storage Humidity


Shipping Weight 0.123 kg
Shipping Dimensions 9 × 7 × 4 cm
6 Months Warranty

This item is covered with a supplier warranty of 6 months from the time of delivery against manufacturing defects only. This is a quality product from the original manufacturer. Only manufacturing defects are covered under this warranty. Replacement will be done against manufacturing defects.

What voids the warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China