Water flow sensor (pressure type)
Other products by Lightobject
Our Price: $7.50
158 units available


This is a pressure type water sensor that used to detect whether water is flowing or not. It is a simple device but works well. The water pressure is adjustable by turning a knob.

The device is ideal for water detector in CO2 laser machine. Once water is flowing through a "T" connector, the normally opened contact become a 'closed' contact. It comes with a free "T" connector


T connector outer diameter: 10mm


Average Rating:
(based on 7 reviews)

Showing 1 - 5 of 7 Reviews:

by Tako
on 3/2/2018
Is my sensor somehow reversed?
Is that possible? Mine seems to be a NC contact. It's closed when to pressure exists and the moment I turn on my pump and water starts flowing it closes! That's of course exactly the opposite of what it needs to be. Is it possible I somehow got a wrong one?
by LBaird
on 11/29/2016
I recieved my LSR-H2OPRSNR but would like to know how many amps/volts I can use on it.
by Roy
on 10/20/2016
Acts like a Momtary switch
Product is well made but final testing before stocking poor. If there were some inspection before stocking the problem would have been found. The switch acts like a momentary switch. at any setting of the dial or water pressure. Contact Lightobject and asked if I could open it up to repair and found that one of the terminals was loose. Tight as much as I could and then working fine. But have no faith in it.
by Jason
on 2/12/2016
Water flow/ pressure sensor
using with 8.3L/min (130GPH) Small DC12V Brushless Submersible Water/ oil Pump (purchased here) and it works flawlessly.
by Scott
on 1/17/2016
Won't Open...
The pump easily triggers it and it clicks and has continuity but when i unplug the pump the switch never opens. I can push down on the switch plunger to reset it and the pump will again close it but it never returns to open when the pump is shut off so it will never indicate a flow failure! Reply by LO: Did you know that you can adjust the sensitivity pressure by adjusting the screw? If it is not functioning well, please contact our support for a replacement.
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