Abstract: A monitoring system includes a master station and a plurality of monitor stations which are spaced from the master station. Each of the monitor stations includes a programmable computer which is connected with a radio and a sensor. The computer and radio may be enclosed in an explosion-proof housing. To change a program in the computer at a monitor station, the program change may be transmitted from the master station to the monitor station. In addition, data relating to a condition to be sensed may be transmitted from the master station to the monitor station.

Abstract: The current invention discloses a wireless monitoring system. The system has one or more monitoring devices. Each device can transmit data and receive messages from an output center or alarm system. The output center can also transmit and receive messages. Both the output center and each device preferably have a transceiver that enables both the transmission and receipt of messages. No remote terminal units or hardwiring is required for the system to function. The system is truly a wireless gas monitoring system. The system may use low earth orbit satellite technology, or licensed radio frequencies or any other means to wirelessly transmit and receive messages.

Abstract: The current invention provides a wireless monitoring system. The system has one or more monitoring devices. Each device can transmit data and receive messages from an output center or alarm system. The output center can also transmit and receive messages. Both the output center and each device preferably have a transceiver that enables both the transmission and receipt of messages. No remote terminal units hardwiring is required for the system to function. The system is truly a wireless gas monitoring system. The system may use low earth orbit satellite technology, or licensed radio frequencies or any other means to wirelessly transmit and receive messages.

Abstract: A monitoring system includes a master station and a plurality of monitor stations which are spaced from the master station. Each of the monitor stations includes a programmable computer which is connected with a radio and a sensor. The computer and radio may be enclosed in an explosion-proof housing. To change a program in the computer at a monitor station, the program change may be transmitted from the master station to the monitor station. In addition, data relating to a condition to be sensed may be transmitted from the master station to the monitor station.