uxcell Stainless Steel Float Switch for Water Pump Tank Swim Pool Garden Pond Liquid Water Level Sensor M11 240mm Length

I put this in my sink to shut off my washing machine if the water level gets too high. You can flip the metal float to change it from NC to NO

I'm very impressed with the apparent quality of these switches. They are beautifully made and work properly as received. Only time will tell if they are reliable and remain free of corrosion.I purchased two of these to use as level control switches in cattle watering tanks. I mounted them inside 1-1/2" PVC pipes to act as stilling wells and to provide protection from big, curious animals. I use these to operate relays that turn the water supply pumps on and off. Previously, I used float valves, but they leaked and wasted water in a solar powered watering system that needs to be efficient. Now the pumps turn on and off based on tank level, and not back-pressure from leaky float valves. The pumps don't run as often, and they operate against very little back pressure, since no valves are involved in the system any longer. Less water is wasted and less solar/battery power is used.

I've been using a few of these float switches in my freshwater top off tanks for my aquariums. When the water reservoir container gets low, the float drops and signals me to add more water.I've been using them in freshwater for months and they're working great. No rust, no sticking and they alert me every time. For the price, compared to other float switches, they're very good

Float switch fail mode is 8K Ohms closed and .5meg Ohms open. Supposed to be glass encased reed switch which should show <10 Ohms closed and infinite resistance open. I'll take the failed on apart to locate any obvious error, moisture ingress possible. Used in outdoor water tank as pump control. They're handy for my application, so I'll keep a spare.

Bought on 3-19, delivered on 3-20, quit working on 4-23 and the return window was 4-20. Just my luck...

I connected this to an ecolink smart sensor with inputs https://www.amazon.com/gp/product/B01N5HB4U5/ and it works perfectly to alert if there is a backup in a floor drain.

used this assembly to make an automatic water top off for the sump of my aquarium. The float trips a timed relay that causes a fresh water valve to open for the right amount of time to fill the overflow back up. Note that this isn't meant to take more than an .5 amps so if your using it to turn something on, you should be using a relay. I also took the top float stop off so I could see it rise better.

I used three of these (different lengths) to measure the water level in the 60 gallon water tank on my sail boat. LEDs are wired in series with the contacts which can be set for NO or NC. Worked out great.