Features: Made from quality stainless steel material, stable performances, has long service life. Heat resistance, wear resistant, reliable quality. Lengthen external thread, easy and convenient installation. Simple and durable structure, can withstanding frequency usage. Widely application, can be used for water heater, irrigation, etc. Specifications: Material: Stainless Steel Interface: DN15 Working Voltage: 3.5-24VDC Flow Range: 1-25L/Min Pulse Characteristics: Hz=[18xQ-3]±5%(Horizontal Test) Withstanding Water Pressure: Lower Equal to 1.75Mpa Inner Diameter: 15mm/13.5mm Thread Length: 20mm Working Current: 15mA(DC5V) Load Capacity: Less Equal to 10mA(DC5V) High Level Output Pulse: Large Than DC4.5V(Input DC5V) Low Level Output Pulse: Lower Than DC0.5V(Input DC5V) Storage Temperature/Humidity: 25-80℃/25%-95%RH Size: Approx. 66x20.5x20.5mm/2.60x0.81x0.81in Package Includes: 1x Fluidmeter Counter 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.