EF-306 Sequential Gas Sampling System

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


The 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, landfill, multi storey car parks, brewing, horticulture, superstore multi refrigeration units.

Additional Features

  • 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, blow back - optional
  • Hazardous area operation - optional
  • Auto flood cut off - optional
  • Enclosure internal gas monitoring with automatic system shutdown - optional
  • Sample line multiplier - optional

Tech Specs

Sample points



2 - standard

1~4 option


Combustible gas - LEL % vol

Toxic gas – ppm % vol

Oxygen – % vol


Refrigerant – ppm

Power Supply

230/115vAC 50/60Hz

LED indicators

System healthy

Main power

Standby power

High gas alarm

Low gas alarm

System, flow, sensor fail

Comms fail




4 line alpha/numeric indicates all functions and status in text. Sample line locations (user settable)

User interface

8 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 Outputs

Global 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 - option


RS232– Data Stream

Modbus 2 x RS485

Can bus – internal


Audible alarm all alarm conditions

LED/display dimming

User/Eng password

LCD backlight

Event logging

Sample line size 6mm OD 4mm ID

Nylon, PTFE, Copper, Stainless Steel. Max length 100m specials 100m+

Sample vent x 2-8mm

Tubing entry enclosure base

Response time 15 to 45 seconds

Colour - powder coat ash grey BSA01

Size 400mm H x 450mm W x 200mm D

Weight 20kg

IP 63

Wall mount


EN60945: 2002

Maritime general requirements

EN61010: 2001

Electrical Safety - LVD

Part Codes

008-920 EF306 Multi-way Sample System Control Panel, 1~20 Sample lines - 2 Sensors
008-925 Enclosure Extension (Top Mounting), 250mm High
008-811 Sample line valve, 24V DC (maximum of 20 per system)



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