Gas Sensors

Guardian Gas Monitors Available 

Gas Sensors

A range of high quality OEM gas sensors for Air Quality, Gas safety & Industry.

Technologies include Catalytic, Electrochemical, NDIR, PID & metal oxide sensors.

  • Gas sensors for NH3, CO2, CO, H2S, O2, CL2, ETO, H2, HCN, HCL, CH4, NO, NO2, O3, PH3, SO2 & VOC's.
  • Support products – mounts, filters, support circuits
  • 4-20mA transmitter boards.
  • Application notes
Alphasense Amatek
Examples of Guardian gas monitors

Precision NDIR Gas sensing solutions for Agriculture, landfill, Biogas, TOC, Mining, HVAC, MAP, CA, Heat Treatment & Horticulture applications.


  • Gascard NG OEM NDIR gas sensors for CO2, CO, CH4, N2O & General Hydrocarbons
  • Chillcard NG OEM NDIR gas sensors for CO2, CO, SF6, CF4, R125, R134a, Refrigerants & Freons.
  • Accessory products – Displays, pumps, filters.
  • Guardian NG & Guardian NG DC – Complete wall mount monitors for CO2, CO, CH4, N2O, SF6 & Refrigerants/Freons.
Edinburgh Sensors — Ferntree Gully, VIC — Anri Instruments & Controls
Gascard NG — Ferntree Gully, VIC — Anri Instruments & Controls

PAROX 1200 OEM Paramagnetic Oxygen sensors with long service life.

Heated cell, Ranges available from 0-5% up to 0-100% Oxygen.

Voltage or 4-20mA outputs. 12-28Vdc supply.

FoxSense AG Front Side — Ferntree Gully, VIC — Anri Instruments & Controls
FoxSense AG Back Side — Ferntree Gully, VIC — Anri Instruments & Controls

Axetris AG

  • Precision OEM Laser Gas (TDLS) Gas detection & Analysis solutions for CEM, Research, Process Control, Biogas, Environmental monitoring, Medical, Natural gas & gas leak detection applications.
  • TDLS (Tunable Diode Laser Spectroscopy) offers excellent target gas selectivity and sub-ppm detection.
  • Gases measured include NH3, HCL, H2O, CH4, CO2, C2H6, C2H4 – For other gases - Please enquire.
  • Easily integrated – Dual gas variants available.


Two models to choose from:-


F200 and Compact — Ferntree Gully, VIC — Anri Instruments & Controls

An extensive range of Electrochemical micro-fuel cell oxygen sensors for Industrial & Medical applications.

See website for the user guide.

Southland Sensing — Ferntree Gully, VIC — Anri Instruments & Controls

For more information about our gas sensors, call 03 9752 3782.

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