The single point system is designed to monitor gas samples from pipelines orprocesses. A powerful high-flow pump extracts and transports gas samples tothe system where they are conditioned to remove dust and moisture. Theconditioned sample gas is then passed across one and four gas sensorsbefore being either exhausted to atmosphere or returned to the supplypipe/process.System integrity is maintained at all times using flow-fail monitoring devices,sample line flame arrestors and an internal flammable gas detector whichshuts the system down in the event of a gas leak within the system cabinet.The system is controlled by a programmable timer which sequences sampleand purge/drain cycles. The current operating mode is clearly displayed andsample/purge times are fully adjustable.The gas sensors are monitored by a Gasmaster control panel which provides gas level display, alarm and fault indication, relay outputs and 4-20mA outputs for each sensor plus RS-485 Modbus communications. Alternatively thesystem can be supplied without the Gasmaster and provide a 4-20mA signal from each sensor plus a system fault contact.