Uxcell a14071400ux0048 0.5-30L/min 1.2Mpa G1/2 Thread Water Liquid Flow Rate Sensor Flowmeter Product Name : Water Flow Sensor; Model : FS200A;Max Switch Current & Voltage : 10mA, DC 3-18V Working Range : 0.5-30L/min;MaleThread Size : G1/2;Max. Water Pressure : 1.2Mpa Total Size : 56 x 35 x 30mm/ 2.4" x 1.4" x 1.2"(L*Max.W*H);Cable Length : 13cm/ 5.1" Frequency Calculation: F=7.5*Q(L/Min)