Gas detection system

A gas detection system for detecting a predetermined gas, the system comprising:

• a first sensing location and a second sensing location;
• a first gas sensor and a second gas sensor;
• a valve system including at least two valves for selectively positioning the first gas sensor in fluid communication with at least one of the first sensing location and the second sensing location and the second gas sensor in fluid communication with at least one of the first sensing location and the second sensing location;
• and
• a controller controlling the valve system in response to signals from the first gas sensor and the second gas sensor, the controller enabling:
• setting the valve system in a first setting in which the first gas sensor is in fluid communication with only the first sensing location to detect the predetermined gas in only the first sensing location, and the second gas sensor is in fluid communication with only the second sensing location to detect the predetermined gas in only the second sensing location;
• in response to detecting the predetermined gas with a tripped sensor of the first gas sensor in the first sensing location or the second gas sensor in the second sensing location, switching the valve system to a second setting in which a non-tripped sensor of the first gas sensor or the second gas sensor that did not detect the predetermined gas is in fluid communication with the first sensing location or the second sensing location in which the predetermined gas was detected;
• in response to the non-tripped sensor detecting the predetermined gas in the first sensing location or the second sensing location in which the predetermined gas was detected by the tripped sensor, initiating an alarm;
• and
• in response to the non-tripped sensor not detecting the predetermined gas in the first sensing location or the second sensing location in which the predetermined gas was detected by the tripped sensor, recalibrating the tripped sensor that detected the predetermined gas.