CAT# MK-108

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$7.95 each
25 Available
Buzzer sounds when water is detected. Water sensor can be placed at a distance by cutting the board and using wires to connect the sensor. 9V operation. Battery not included.

Note: Kits cannot be returned or exchanged once assembly has begun.
Average Customer Review:  (7 Reviews) Write A Review

Customer Comments

Average Customer Review:  (7 Reviews) Write A Review

A customer from Chicago
Works great!
I have this near my basement sump. I even used a 9V transformer to power this up so I never have to worry about the battery. This unit is very sensitive.

A customer from Sioux Falls, SD
Great kit!!
I picked up three of these kits. I was amazed at how easily they go together. Each kit consists of a PCB board, two resistors, a transistor, a buzzer, and a battery holder.

Used in conjunction with All Electronic's 108dB piezo alarm I can hear this thing two floors up.

A customer from Orinda, CA US
Water Sensor
This kit is easy to build, work wells, and can be used to trigger a relay instead of sounding the buzzer. Kit includes an on-board water probe, but circuit is so sensitive that you can just use two wires, with skinned ends for a probe.

A customer from USA
Pump Engine Shutoff
I work for a Lawn Care Co. We have main tanks which hold up to 500 gals. and 30 gal. saddle tanks. It has happened in the past when switching from main to saddle and back again that the valves would be left in the main to saddle position when they should be in the main to main position. A person would be spraying the lawn not realizing their error and then the saddle tank would overfill and you can guess the rest... I'm trying to modify the kit so the it will operate off of a 12v car battery and shut the pump engine off when the saddle tank overfills. I've got everything work out ok but I'm still having a little trouble stepping down the 12v to 9v without frying the transistor. Any suggestions?

A customer from HOONAH, AK US
Finally - a practical water alarm!
Should have bought these *before* my hot water tank sprung a leak. Now I have three: one by the washer, by the hot water heater, one by an outside basement wall.

Very little current draw. After almost 2 years, my standard Raovac Alkaline battery still has 9.3V in it!

Extremely easy to make, loud, sensitive, cheap, easy to use
=> very practical!