Features: The output of water flow sensor is NPNpulse signal. The flow rate can be knownby counting pulses with single chip microcomputer orPLC, and the flow rate can be knownby detecting the number of pulses/time in unit time. The water flowmeter is generally a non-corrosive and impurity free liquid. Gear flowmeter is recommendedfor liquids with high viscositys, such as milk, diesels oil, laundry detergent, etc, which can flow oil liquids, but not too close to pasteliquids. It is recommendedto use impellers flowmeter for general water. The valvesbody of water flowmeter is made of stainless steel, and the impellesr inside is made of plastic, which is not easy to rust and durable. The temperature probes of the water flowmeter is a 3950, 50K thermistor. Specifications: Material:Stainless Steel Flowmeter Size: Approx.33.27x66mm/1.3x2.59inch The working voltage is 3.5-24V, and the current does not exceed 10ma. Long-term temperature is notrecommended to exceed 90 degreesCelsius. The water pressure shall not exceed 1.75MPA. The accuracy error is about 3%. Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Water Flow Sensor