The multi-point system uses the same sampling arrangement as the singlepoint system, but can monitor up to 16 separate sample lines on a sequentialbasis. The multi-point system provides a cost effective and low maintenancesolution for monitoring gas hazards in buildings, pumping stations, storageareas etc.Each sample line is monitored for one minute on a sequential basis, and thesamples are passed across one to four gas sensors. Filters, flow-fail devices,internal gas leak detectors and flame arrestors are fitted to ensure safe andreliable operation at all times. Sample and purge times are fully adjustable, anda specific sample line can be selected and held at any time using buttonsmounted on the front panel.The gas sensors are monitored by a Gasmaster control panel which providesgas level display, alarm and fault indication, relay outputs and 4-20mA outputsfor 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.