1 ~ 60 l / min 3/4 \DN20 water flow rate Plastic Hall flow meter control fluid flow Item Number: FS300A Material: Plastic Options: Function: sensor, flow control Thread size: male G 3/4 .59 cm Size: L 67 X mm 38 mm x 3/4 \male thread 2.59 cm Color: Black Color Flow rate: 1 ~ 60 l / min Flow Pulse: F (Hz) = (5.0xq) -3% Q = L / min Max. Operating current: 15mA (DC5 V) The minimum operating voltage: DC 4.5 V Operating voltage: V 3 V DC ~ 18 V Load Capacity: = 10 mA (DC 5 V) Working Temperature: -25 degrees Celsius + 80 degrees Celsius Material Temperature: 120 Accuracy: 2% ~ 5%