This Gravity: Liquid Flow Sensor is designed based on the electromagnetic principle. It adopts 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)

• Gravity interface, easy to wire
• Wide voltage of 3.5~24V
• Measure the flow of the high-concentration but low-viscosity liquid
• RoHS compliant

• Measure the flow of liquids with high concentration and low viscosity

• Operating Voltage: DC3.5~24V
• Operating Current: ≤10mA (DC5V)
• Output Mode: NPN pulse signal
• Pipe Diameter: G1/2
• Thread I.D.: 10mm
• Thread O.D.: 20.5mm
• Thread Length: 29mm
• Water Pressure Resistance: ≤1.2MPA
• Insulation Resistance: >100MΩ
• Flow Range: 30-1200L/H
• Error: ±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: 50%±10%
• Flow & Pulse Correlation: 1L=150 pulses
• Operating Temperature: ≤80°C
• Operating Humidity: 35%~90%RH (No condensing)
• Storage Temperature: -25°~+80°C
• Storage Humidity: 25%~95%RH
• Dimensions: 80*47*37mm/3.15*1.85*1.46"

• Product wiki

• Gravity: Liquid Flow Sensor (G1/2) × 1