Features: Thread: 1.25-inch, flow range: 3-120L/MIN1%, volatge: 5-24VDC. All stainless steel structure, good sealing performance, easy to install. Wiring: Red-in-Positive/Yellow-out-signal output/Black-GND-Negative. The water- flow sensor consists of stainless steel body, flow rotor- assembly and hall sensor. Widely used in petrochemical industry, farmland- irrigation, waterworks-, residential water flow- control, swimming pool, water conservancy- construction, river thinning and other water- flow control fields-. Specifications: Material: stainless steel Size: approx 4.7x4.7x6.4cm/2x2x2.5in Operating voltage range: 5-24VDC Maximum operating current: 15mA (DC5V) Load capacity: equal or less than 10mA (DC5V) Allowable pressure equal or less than1.75mpa Storage temperature/humidity: -25 to +80C/25% to 90%RH- Flow range: 3-120L/MIN1% Pulse characteristics (Hz) =[1.08xQ]5%, which is 64 pulses per liter of water Inner diameter/outer diameter inlet inner diameter 32.5mm, outlet inner diameter 30mm/ outer diameter 41.5mm The length of screw teeth is 16mm Output pulse high level : more- than DC4.5V (input voltage DC5V Output pulse low level: The output pulse duty ratio is 5010% Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Water- Flow Sensor