G1/2 Hall Effect Liquid Water Flow Sensor Switch Flowmeter Counter DC5V 1-30L/min Black YF-S201 4 Wire Curtain Track Rollers The amount of sound absorption

The amount of sound absorption cotton in a box should be tested actually

Wash them after each time of use

Package Include: 8 Pack x Standoff with rubber spacer

Easy to store

G1/2 Hall Effect Liquid Water Flow Sensor Switch Flowmeter Counter DC5V 1-30L/min Black YF-S201 4 Wire Curtain Track Rollers The amount of sound absorption1. The Water Flow Sensor is light, nimble outline, small size and easy to install. The bearings used in the rotating part. 2. There is an integrated magnetic hall effect sensor that outputs an electrical pulse with every revolution. The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry. 3. Four wire connection: Red for positive, black for negative, yellow for pulse signal, green for temperature signal(3950K