The multi-point system uses the same sampling arrangement as the single point system, but can monitor up to 16 separate sample lines on a sequential basis. The multi-point system provides a cost effective and low maintenance solution for monitoring gas hazards in buildings, pumping stations, storage areas etc. Each sample line is monitored for one minute on a sequential basis, and the samples
are passed across one to four gas sensors. Filters, flow-fail devices, internal gas leak detectors and flame arrestors are fitted to ensure safe and reliable operation at all times. Sample and purge times are fully adjustable, and a specific sample line can be selected and held at any time using buttons mounted on the front panel.
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 the system can be supplied without the Gasmaster and provide a 4-20mA signal from each sensor plus a system fault contact.