Floor Water Sensor for Flood and Leak Detection (30 ft)

I had previously asked a question through Amazon on how far I could extend the wires on this unit. The response I got was that it had only been tested up to 30 feet. I can confirm the product works fine at least up to the 50 feet of wire I used to extend it (I wasn't able to respond to my own question). I used typical CAT5e wire that I had around, bundling 4 of the 8 strands together to create 2 heavier gauge wires. Works just fine when paired with an Arduino using a digital PULL_UP pin and the onboard ground connection.

I wanted to know when the drip pan in my attic air conditioner unit had water in it. I wired this sensor into the NO/NC contacts on an Avigilon IP security camera. When the pan fills with water, the sensor activated the input on the camera and sends a alert to my smartphone and sounds a buzzer I mounted to the wall. Great sensor for the price!

I was trying to hook it up to my home a/c system, but it is a "Normal Open" switch and I need it to be "Normal Closed"

Just received this product. Using it to automatically add water to a pool. Connected it to an 12 bit ADC. A 10M resistor divider is required. Have ran several tests including fully submerged for hours and then fully removed from water. Works perfectly. As the device dried the voltage approaches 0V. Will put into production shortly.Update: After one season, sadly the chemistry of the pool water caused the leads to erode. As a result a different sensor maybe needed for my use. This being said the sensor did perform flawless until the erosion.

I hooked 3 of these sensors up to my Lorex nvr alarm inputs. When my basement floods, I’m sent notifications. I installed an 8v dc power supply directly in line with the sensor circuit. So basically when the two prongs are in contact with water, the circuit is closed and sends that 8v current into the alarm input. Works perfectly

Edit: this seems to retain water after the level has gone down, so it continues to report water is present. I ended up not using it.It's literally two wires leading to metal contacts, no other electronics; and hence a bit overpriced. When the contacts are immersed in water you get around 1.4Mohm of resistance from the water between them, which means they'll work with a 10 Mohm pulldown resistor and an Arduino's analog input. Water doesn't conduct enough to trigger an digital input, so if you want that you'll have to rig up your own amplifier with a 2N2222 or something.You're paying for someone to supply wire to two contacts that won't rot away in water, which is what happens if you just use bare copper wires an 1" apart for the same purpose.

Water alarm in Concord 4

I used this to build a custom "leak indicator" for an intermittent plumbing leak up in the ceiling of our garage. I built a circuit similar to the example given, and it works great! It's a well-built unit and I would definitely purchase again for all leak detection needs. Comes with pre-stripped and tinned wires which was a nice touch.

2 wire easy install. Tested out fine.Buy with confidence