It was not very long when smart home sensor system came with half a dozen special purpose deices and each having a different function of the home environment. The co-creator of the Notion home monitoring system Brett Jurgens says,”Gone are the days of needing different types of sensors for different applications.” Each Notion sensor has an identical multi function design which can detect anything at a time. It is a disk shaped device that can sense sense sound, temperature, light, proximity, orientation, acceleration, natural frequencies and moisture. It uses multiple sensor modes to keep tabs on the situation even if one tells each sensor to monitor if a door or window is opened, to know whether a “dumb” appliance is running or to see if a fish tank is leaking.
The term “Natural frequencies” definitely needs some explanation. It is also known as resonant frequency and it is the concept that several objects are able to vibrate on a certain frequency. Consider blowing air over the highest point of a glass container to make a profound shrieking tone. The less fluid in the jug, the more profound the note: Changing the level of the fluid changes the resonant frequency. Notion says that it is able to detect how full a gas tank is just by attaching to the outside surface using the piezoelectric sensor to measure the vibration of the tank.
Notion sensor uses a replaceable coin cell batteries and the manufacturers are targeting for the battery life of two years span. The sensor sends data to a hub via an 802.15.4 radio protocol that Notion developed in-house. The hub plugs directly into a wall socket and connects to the Internet over wifi. Majority of the data processing is done in the cloud with alerts and info passed back to users via a mobile app.