Single Point Gas Alarm

Key Features
Data logging
Three alarm stages + Relays
4~20mA analogue output
Sensor input select 4~20mA/mV


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 that may require hazardous area sensing.

The EF-101 may be utilsed as a standalone unit or as an addressable sensor forming part of the EF Combi CANbus addressable network system and therefore offering the features of our most advanced system.

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

Additional Features

  • Back lit alpha numeric full status display
  • Internal or remote sensor options
  • Aspirated sensor option

Tech Specs

Measuring Range

Combustible Gas - LEL, % Vol, ppm

Toxic Gas - ppm

Oxygen - % vol - Depletion or Enrichment

Any 4~20mA source input signal


Two line alphanumeric back lit display

Power - Green LED

Alarms 1, 2, 3 - Red LEDs

Alarms inhibit - Amber LED

Audible Alarm

1, 2, 3 and Fault Alarms - mutable

85dB @ 10cm

Power Supply

24v nominal 15 to 30vDC

Option - 230/115v AC 50/60 Hz

The two voltages may be utilised simultaneously - standby supply

Power Consumption

4 watts - full alarm


1, 2, 3 and fault alarm relays - SPCO normally de-energised - energised option, latched or unlatched

All contacts rated 3A - 230v AC



Logging - intervals - one minute to one hour

Storage - 2, 880 readings

Alarm Settings

Digital setting (fully adjustable between zero and full scale)

Delay to alarm

Sensor Inputs

Bridge type 3 wire detector mv (Catalytic)

4-20mA (electrochemical/infrared/catalytic/PID/semiconductor)

Sensor Cable

3 core 1.5mm2 screened 1/5km


Operating Temperature: -15 to +50ºC

Storage Temperature: -5 to 55ºC

Alarm relay inhibit during calibration

Sounder Inhibit

System function test

Dimensions: L 145mm H 145mm D 65mm 24v DC, Version (S)

L 145 mm H 145mm D 95mm AC, Version (D)

Weight: 0.8 kg

Protection: IP65

Field Terminals - screw type 2.5mm

Cable entry - top, bottom, sides, rear

Part Codes

EF-101-S Single Point Gas Alarm, 24V DC Version
EF-101-D Single Point Gas Alarm, 24V AC Version



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