LEFOO LF20 Extended Duty Pressure Switch, 10psi±2psi Adjustable, Air/Oil/Water Media, SPDT, 1/8 NPT Male, 1/4 Blade, Black, Automatic Operation, IP54 Rated

Was looking for a switch to shut down the electricity on my gauges when the tractor is stopped. Work flawlessly!

Works great for booster activated switch on turbo vehicle. Adjustable with Allen wrench. I've adjusted as low as 5 or so psi and as high as 20 psi but I think it goes higher.

I’m going to be using these for my oil pressure on my tractor, one to drive the gauges/hour meter and the second for an alarm.I took these switches into work and used probably $20K worth of calibrated testing equipment to test them out, I must say it’s handy having those types of tools at my disposal and this is what I foundOut of the box one was set for 10.8 PSI and the other 10.2 but both were very repeatable, ie I could go above pressure and they’d trigger, then drop below until they dropped out then bring it back up again and would trigger at the same pressure. I wanted a bit higher so adjusted them both to 11.5PSI and again they repeatedly would trigger at the same value.Adjustment was easy, just an Allen wrench keyI haven’t had a chance to try them in the tractor yet but so long as they don’t leak, very happy with them

With both normally open and normally closed contacts, this is a very versatile switch. It took me a while to figure out that to adjust it you have to pry off the little rubber plug on top. Under that is a bolt that needs an Allan wrench. It looks like it has a wide range of adjustment but I'll have to experiment to see what the limits are. I already want to order another.Update: I have created a highly reliable water tank level gauge with these pressure switches! I use one switch for each LED light on the gauge. The lights are displayed vertically and each represents one tenth of the volume in my tank. I set each pressure switch to correspond to the pressure of the level it represents. I can tell at a glance from a long distance how much water is in my tank. When water is in use the level drops a few notches until it is turned off so I can detect leaks with this gauge as well. I have an extra led on top that blinks when the pump is running. The blinking is caused by slight pressure fluctuations in the filling pipe from the pump which are detected by the sensitive pressure switch. No wires between the tank and the gauge. Powered by a tiny solar panel. No more ladder leaning on my water tank! I took a piece of pvc pipe and drilled and tapped 10 1/8" pipe holes. Screwed the switches into the holes. It can be located anywhere along the pipeline bit it must be calibrated for whatever location you choose.

Pressure sensor is working fine . Adjustment on the end help adjusting setting point.Thanks