Sensors that smell trouble

Roboticwares developed olfactory sensors to keep track of the amount of LPG in the air. The sensor is an electronic circuit that carries chemicals that react with LPG in the air. Based on this, the electrochemical sensor gives an analogue value output as per the density of the LPG.

Once the amount of LPG reaches 1000 parts per million (ppm), the system turns the alarm ‘on’ and sends alert SMS to the registered mobile numbers. The alarm switches off only when the amount of LPG in the air reduces to a safe level. SMS is sent once again to the mobile numbers after the leakage stops.