Gas hazard monitor

Sunday, 10 April, 2005 | Supplied by:

Crowcon's Gasmaster control panel monitors toxic and flammable gases in water and wastewater installations. The wall-mounted device displays all gas levels simultaneously on a large, multilingual LED display, allowing full system status checks at a glance.

The Gasmaster can monitor up to four channels, with two levels of alarm per channel, allowing it to monitor virtually any combination of flammable and toxic gas detectors, oxygen detectors and fire detectors (smoke, heat or flame).

All functions, from day-to-day operation to re-calibration, are done on the front panel, so routine testing can be carried out in an instant. The device also warns when calibration is due and all inputs and outputs can be quickly tested at the push of a button.

All alarms and faults are recorded in an 'event log' which can be accessed regularly to assess risks on site. Analog outputs and RS485 digital communications allow the control unit to be connected to PLC/DCS/SCADA systems, a PC, a chart recorder or data logger. An integral 85 dB multi-tone sounder is fitted as standard. Battery backup is also provided as standard, ensuring continual protection even if the power fails.

Relays can operate in 'fail-safe' mode and all coils are actively monitored so Gasmaster can warn if a relay fails. In its alarm state, both visual and audible warnings are activated. Further relays are provided to control other equipment including ventilation systems, status lights and valves, depending on the alarm state of the control unit.

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