This wireless transmitter works along with wireless repeater. In this type of wireless transmitter repeater arrangement, the cap of the sensor is perforated at top of the transmitter, which allows the surrounding atmospheric air to get diffused with the sensor. Thus if any gas is present in the atmosphere, it will cause variation in the sensor output indicating the presence of the gas. The sensor output is then amplified by the
electronic circuitry and digitally displayed on the transmitter’s LCD & transmitted in air through the wireless module transmitter repeater, which is then received by wireless module receiver. Depending upon the level of gas present, which also displays on receiver LCD, an alarm is triggered at corresponding levels.