A gas monitoring and alarm system comprises a master monitor and at least one remote monitor. The master monitor is coupled to a master sensor that senses a concentration of a gas in a first area and sends data to the master monitor. The at least one remote monitor is communicatively coupled to the master monitor. The least one remote monitor is coupled to a remote sensor, which senses a concentration of gas in a second area. The at least one remote monitor receives data about the concentration of the gas in the second area from the remote sensor, and sends the data to the master monitor. The master monitor receives the data and triggers a first alarm status when the concentration of gas in at least one of the first area and the second area exceeds a first predefined alarm threshold.