DIGITEN G3/8" Quick Connect Water Flow Sensor Switch Flowmeter Counter 0.3-10L/min
Waterproof, heat resistance, pressure resistance, cold resistance. Easy to install.
Frequency: F=21 * Q (L / Min) error: ± 2% voltage : 3.5-24VDC,
current can not exceed 10mA, 450 output pulses/liters,
F=constant * units of flow (L / min) * time (seconds)
Working voltage range: DC 5-24 V
Operating Temp:≤80℃,Operating humidity:35%-90%RH
Pressure range: Water pressure 0.8 MPa below
Output Waveform: Square Wave, output pulse signal.
G 3/8" Flowmeter x 1
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I've updated this review and deleted what I had before. While I had problems with air flowing through it, as the seller pointed out here, it isn't made for airflow. Once I began pumping water through it, I had no problems with the spinner inside. The mistake was mine, and the product is good!