Item Type: Water Flow Sensor_x000D_ Material: Aluminum_x000D_ Surface Treatment: Electroplating_x000D_ Output Signal: Output NPN Pulse Signal_x000D_ Model: YF -DN80_x000D_ Interface Size: 3in Male Thread_x000D_ Working Voltage Range: DC5-18V_x000D_ Inner Diameter: Approx. 77mm / 3in_x000D_ Outer Diameter: Approx. 87mm / 3.4in_x000D_ Thread Length: Approx. 21mm / 0.8in_x000D_ Water Pressure Resistance: 1.75MPa_x000D_ Output Pulse High Level: >DC 4.5V (input voltage DC 5V)_x000D_ Output Pulse Duty Cycle: 50%10%_x000D_ Load Capacity: 10mA (DC5V)_x000D_ Insulation Resistance: >100M_x000D_ Flow Range: 20~500L/MIN_x000D_ Airtightness: Close each hole, add 1.7Mpa water pressure test for 1 minute without leakage and deformation_x000D_ Flow Pulse Characteristics: F=(0.5 x Q)3%, F is frequency, Q is L/Min Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store