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GDS404 1-4 Channel Gas Alarm



GDS404 Gas Alarm
Up to 64 addressable sensors
1-16 direct 4~20mA sensors
Either or both types of sensors
Single 4 core sensor network (addressable)
On screen text description of sensor locations
3 alarm levels
Event log
Low cost installation
Repeater panel - option
64 Additional relays - option
One man calibration utilising peak readings
Automatic safety check diagnostics/system surveillance




Combi has been designed to operate in the full range of environments from commercial premises through to heavy
industrial applications which may require hazardous area sensing.

Typical monitor locations are - public buildings, car parks, tunnels, breweries, boiler plant rooms, water treatment works, H&V control, manufacturing, process plants, horticulture, hotels, offices.



Each gas sensor continuously monitors the atmosphere, reporting any hazardous conditions to the control unit, for display by the alpha numeric screen indicating the reporting sensor, gas type, concentration and alarm status. Alarm levels that are exceeded will automatically activate a variety of signal outputs including analogue/digital data and user selectable
relays.

The Combi system operates on a 4-core (addressable) or 2/3 core (direct) cable network and has the capacity to monitor up to 64 addressable and 16 direct sensors of various gas types. Larger systems offering unlimited sensors can be achieved using multiple combi units housed in a 19” rack based system. The Combi is supplied ready to use with precalibrated gas sensors and provides for additional sensors that can be easily added to any point of the network.



Sensor points 1-64 addressable – Can bus – and/or
16 direct 4~20mA
Measurements Combustible Gas - L.E.L., % vol
Toxic Gas - ppm, % vol
Oxygen - % vol - Depletion/Enrichment
Refrigerant - ppm
Any 4 ~ 20mA transmitter
Indicators - control unit concentration Dot matrix LCD 4 line 40 character - indicating sensor location, gas type,
concentration (rising or falling), alarm status, system fault, line fault, sensor fault,
inhibit, real time clock, event memory
Red LED - global alarm Amber LED - global fault




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