EF-100 Single Point Gas Alarm


Key Features

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  • Flammable, Oxygen or Toxic Gases
  • Wall or panel mount
  • Two alarm stages + relays
  • Internal or remote sensor
  • Compact size


A fixed single point alarm unit that meets the requirements for economic and reliable monitoring of gas levels in a wide range of environments, from commercial premises through to heavy industrial applications which may require hazardous area sensing.

Typical monitor locations are – public buildings, boiler plant rooms, swimming pools, water treatment works, H&V control systems, manufacturing and process plants.

Additional Features

  • Low power consumption
  • 4-20mA analogue output
  • Sealed to IP65 rating
  • Extensive fault detection circuitry
  • Delay to alarm options

Tech Specs

Measuring Range

Combustible Gas – LEL, % Vol, ppm

Toxic Gas – ppm, % Vol

Oxygen – % vol – Depletion or Enrichment

Any 4~20mA input signal


Digital Display 31/2 Digit

Power – Green L.E.D.

Switch on delay power indicator flashing – 45 secs

Alarms Lo/Hi – Red L.E.Ds

Fault – Amber L.E.D.

System Test – Alarm L.E.D.s flashing

Alarm relay inhibit – Fault L.E.D. on

Audible Alarm

Low, High and Fault Alarms

Power Supply

230/115v AC 50/60 Hz or 24vDC

The two voltages may be utilised simultaneously – standby battery

Power Consumption

4 watts – full alarm


Low, High and fault alarm relays -SPCO normally de-energised – energised option

Low gas alarm relay SPCO normally energised – de-energised option latched or unlatched

Fault relay SPCO normally de-energised – energised option

All contacts rated 5A – 230v AC


Output 24vDC @ 100mA max – auxiliary equipment (non inductive)

Alarm Settings

Digital setting (fully adjustable between zero and full scale)

Delay to alarm options – 10/30 seconds, 10 minutes

Sensor Inputs

Bridge type 3 wire detector mv (Catalytic)

4-20mA (electrochemical / infrared)

Sensor Cable

3 core 1.5mm2 screened 1.5km


Operating temperature -10 to +50˚C

Storage temperature -10 to 65˚C

Alarm relay inhibit during calibration

Sounder Inhibit

System function test switch

Dimensions L200mm H 120mm D 58mm

Weight 0.8 kg

Protection IP65

Field Terminals – screw type 2.5mm

Cable entry – top, bottom, sides, rear

Part Codes

100-210EF100 Control Unit – Flammable Gas
100-220EF100 Toxic Control Unit
100-260Standby Battery Pack 24v/0.8Ah