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MX gas detector is a device which detects the presence of various gases within area, usually as a part of safety system. This type of equipment is used to detect a gas leak. This type of device is important because there are many gases that can be harmful to organic life such as humans and animals. Gas detectors can be used to detect combustible flammable and toxic gases and oxygen detection. They transmit warnings via a series of audible and visible signal such as alarms and flashing lights, when dangerous levels of gas vapors are detected. As detectors measure a gas concentration, the sensor responds to a calibration gas which serves as the reference point or scale. As a sensor?s detection exceeds a preset alarm level the alarm or signal will be activated.