• Multi Zone Gas Detector
  • GAS 306

GAS 306

Part No. Various

The GAS 306 system is designed to monitor gas levels from a number of sample-points, targeted at situations where the positioning of conventional gas sensors may not be practical.

Product Details


The GAS 306 system is designed to monitor gas levels from a number of sample points, targeted at situations where the positioning of conventional gas sensors may not be practical. This may be due to equipment security, cable routing, access for detector head installation/maintenance, harsh environment or a cost-effective means of monitoring designated hazardous areas, typically – tunnels, marine applications, underground/high-level voids, process control, landfills, multi-storey car parks, brewing, horticulture, superstore multi refrigeration units.


A central control unit sequentially extracts gas samples via fixed sample lines for a timed period. A high-rate sample is taken by the main pump, during which a reduced-rate sample is passed across the sensor device.

The central unit provides gas level readouts with two alarm trip points per line, providing a range of signal outputs for annunciator and control functions.

Key Features

  • 1-20 sample points
  • Monitor up to 4 gas types
  • No sample line purge delay
  • Wide range of sensor types
  • 4 line alpha/numeric display
  • Selectable sample line sequence
  • Display of each sample line location
  • Easily installed and maintained
  • Full indication of all operations
  • Event logging / Modbus / RS232 / RS485
  • Line blockage and pump fail monitoring
  • Variable sample time for optimum cycle time
  • High integrity, comprehensive self-check fault monitoring
  • Centralised one-man calibration offers minimum running costs
  • Split system operation – optional
  • Remote control panel – optional
  • Line blockage, blowback – optional
  • Hazardous area operation – optional
  • Auto flood cut-off – optional
  • Enclosure of internal gas monitoring with automatic system shutdown – optional
  • Sample line multiplier – optional
Sample points1–20
Sensors2 – standard
1~4 option
MeasurementsCombustible gas – LEL % vol
Toxic gas – ppm % vol
Oxygen – % vol
Refrigerant – ppm
Power Supply230/115vAC 50/60Hz
300W max
LED IndicatorsSystem healthy
Main power
Standby power
High gas alarm
Low gas alarm
System, flow, sensor fail
Comms fail
Display4 line alpha/numeric indicates all functions and status in text. Sample line locations (user settable)
User interface8 panel mounted push buttons – main panel and remote panel: Reset, Scroll, Hold, Dim, Enter, Down, Up, Select
PC – event log / data log, data to and from system controls
Relay OutputsGlobal Low S.P.C.O.
Global High S.P.C.O.
Global Fault S.P.C.O.
Flow Fail S.P.C.O.
Power Fail S.P.C.O.
Cabinet Sensor S.P.C.O.
32 programmable relays
Additional 32 optional
CommunicationRS232 – Data Stream
Modbus 2 x RS485
Can bus – internal
GeneralAudible alarm all alarm conditions
LED/display dimming
User/Eng password
LCD backlight
Event logging
Sample line size 8mm OD 6mmID
Maximum length 300m
Nylon, PTFE, Copper, Stainless Steel Sample vent x 2–10mm Tubing entry enclosure base, side option • Response time 15 to 45 seconds Colour – powder coat ash grey BSA01 Size 800mm H x 600mm W x 350mm D IP 63 Wall mount Weight 65kg
StandardsEN60945: 2002
Maritime general requirements
EN61010: 2001 Electrical Safety – LVD

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