EF-100 Single Point Gas Alarm

Key Features
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

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



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