Rated operating voltage: DC4.5-24V Maximum operating current: 15mA (DC5V) Flow range: 2-100L/min Operating temperature range: up to 80C Pulse characteristics: f=1.0*Q (F: frequency, Q: L/min) Type: Turbine flowmeter Water pressure: 1.75MPa Voltage: DC3.5-24V Caution: 1. No severe impact or chemical attack is permitted 2. Do not throw or bump 3. Press the arrow on the product to install 4. Medium temperature should not exceed 80C Suitable for weak acid and water-based liquids only Note: Red IN: Positive Yellow OUT: Signal output line Black GND: Negative Frequency calculation = Constant 1 * Unit flow rate (L/min) * Time (seconds) DIY Supplies: Plumbing Coupling Type: Male BSPT Thread Type: Turbine flowmeter Feature: Hall Flowmeter Water pressure: 1.75MPa (Low pressure) Load capacity: 10mA (Low) Size: 114*60*48mm Color: Black Material: Plastic Package Contents: 1 x Water Flow Sensor Only the above package content, other products are not included Note: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3cm