Key Features

  • Data logging
  • Three alarm stages + Relays
  • 4~20mA analogue output
  • Internal or remote sensor option
  • Aspirated option


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 101 may be utilised as a standalone unit or as an addressable sensor forming part of the Combi CANbus addressable network system and therefore offering the features of our most advanced system. Typical monitor locations are:

Public buildings
Boiler plant rooms
Swimming pools
Water treatment works
H&V control systems
Manufacturing and process plants

Tech Specs

Measuring RangeCombustible Gas – LEL, % Vol, ppm
Toxic Gas – ppm
Oxygen – % vol – Depletion or Enrichment
Any 4~20mA source input signal
IndicatorsTwo line alpha numeric back lit display
Power – Green LED.
Alarms 1, 2, 3 – Red LEDs
Fault – Amber LED
Alarms inhibit – Amber LED
Audible Alarm1, 2, 3 and Fault Alarms – mutable
85dB @ 10cm
Power Supply24v nominal 18v to 30vDC
Option – 230/115v AC 50/60 Hz
The two voltages may be utilised simultaneously –
standby supply
Power Consumption4 watts – full alarm
Outputs1, 2, 3 and fault alarm relays – SPCO normally de-energised – energised option, latched or unlatched
All contacts rated 3A – 230v AC
Selectable inhibit active indicator or re-settable sounder output – O/C 100mA – 24DC
4-20mA, Sink/Source
Alarm SettingsDigital setting (fully adjustable between zero and full scale)
Delay to alarm
Sensor InputsBridge type 3 wire detector mv (Catalytic)
4-20mA (electrochemical / infrared / catalytic / PID / semiconductor)
Sensor Cable3 core 1.5mm2 screened 1.5km
MiscellaneousOperating temperature -15 to +50˚C
Storage temperature -5 to 55˚C
Alarm relay inhibit during calibration
Sounder Inhibit
System function test
Dimensions (L x H x D)145mm x 145mm x 65mm 24vDC version
145mm x 145mm x 100mm AC version
Ingress ProtectionIP64


Gas list available on request.


101 Gas Detector

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