We're here to help. Whether you're having issues with Presence or you have a great idea for a new feature. We want to hear about it. Seriously.

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425 Broadway Street
Redwood City, CA 94063

Presence is the award-winning free app that turns old smartphones and tablets into Wi-Fi security cameras and you can download it today.

Presence Security is the addition of easy to install wireless sensors that notify you and your trusted circle when something important happens to fit with today's mobile lifestyle. No monthly fees are required! We want security to be affordable for everyone because we all have homes, loved ones and valuables that we want to protect.

How our Water Sensors Work


How our Water Sensors Work

Brian Hinderberger

The Water Sensor has a small water probe attached to the transmitter with a long cable.

You can completely submerge the small water probe in water, but don't get the transmitter wet. When the water probe is wet with some water connecting both metal probes at once, the sensor will report 'Wet'. When there is no water touching both metal probes, the sensor will report 'Dry'.


  1. Peel off the sticky backing on the transmitter. Place it up high, on a wall, away from water.
  2. Peel off the sticky backing from the small water probe. Stick this to a place you want to detect water, with the metal tips facing down to where the water will collect.


The Water Sensor is typically used to detect leaks, which can cost a homeowner tens of thousands of dollars to repair. 

The Water Sensor will automatically alert you when its battery is getting low. It takes a CR2450 Lithium coin cell battery, which should last a few years.