Gas detectors will keep you, your company, and your staff safe. Knowing what your gas detectors can do for your team is important. Let’s break it down.


Ex. Sensor Assembly

OI-[Model #]-[Sensor Type]-[Gas Type]-[Power Supply]-[Enclosure]


Choosing your sensor type is important. Each sensor is different. Sensors take time to respond to a gas leak. 

EC: Electrochemical

  • measures concentration of target gas by oxidizing or reducing the target gas at an electrode and measuring the resulting current

CB2: Catalytic Bead

  • used for combustible gas detection 

IR: Infared

  • sensor for direct measurement of carbon dioxide and combustible gas

LPIR: Low Power Infared

  • sensor for direct measurement of carbon dioxide and combustible gas

PID: Photo Ionization Detector

  • measures Volatile Organic Compounds (VOCs) and other gas compounds in parts per million (ppm)
  • more sensitive than catalytic sensors


CO: Carbon Monoxide

  • produced by partial combustion of fossil fuels
  • source may be a faulty boiler or furnace without adequate ventilation, or a vehicle engine or generator left running in an enclosed area
  • common domestic hazard

H2S: Hydrogen Sulfide

  • “bad egg” odor can be smelled at 0.13 ppm
  • between 50-100 ppm, sense of smell is paralyzed
  • produced during the decay of organic materials
  • extracted with sour oil
  • constituent or byproduct of biogas

O2: Oxygen

  • normal level is 20.9%
  • a small decrease can impair mental & physical agility

LEL: Combustible Gas (Methane) 

HCL: Hydrgen Chloride

HCN: Hydrogen Cyanide

NO: Nitric Oxide

NO2: Nitrogen Dioxide

O3: Ozone

SO2: Sulphur Dioxide

  • colorless
  • formed when burning sulfur and materials containing sulfur (oil & coal)
  • highly acidic, forms sulphuric acid when dissolved in water
  • with oxides of nitrogen, causes acid rain
  • affects respiratory system

H2: Hydrogen

CO2: Carbon Dioxide

  • can be released by leaking refrigeration systems & cylinders
  • may be fatal in a confined space

NH3: Ammonia

CH4: Combustible Gas (Methane)

HF: Hydrogen Fluoride

PH3: Phosphine

VOC: Volatile Organic Compounds

Cl2: Chlorine

  • pungent smell
  • corrosive
  • heavy green/yellow gas 
  • used in water purification for domestic uses, swimming pools, manufacture of PVC, bleaching paper & fabrics


9: GEN II 900 MHz Radio with Right-Angle Flexible Dipole Antenna

  • used for Domestic Applications

2: GEN II 2.4 GHz Radio with Right-Angle J-Pole Antenna

  • used for International Applications



  • 4-20mA


  • time saving conduit-free setup and maintenance
    • requires fewer field hands
  • no wires
  • safe
  • cost-efficient
  • no external power source
  • ease of use and implementation
  • ability to use multiple receivers
  • ability for remote monitoring
  • accurate readings
  • dependable application


DC: Direct Current

  • OI-6900: dual 3.6 VDC lithium batteries
  • OI-6940: 3.6 VDC/76Amp Hour battery pack
  • All other devices 12-35 VDC with varying current draw

AC: Alternating Current

  • 100-240 VAC input, 24VDC output power supply


Explosion Proof

  • Group C & D Explosion Proof Enclosure

Non-Explosion Proof

  • Cost-Efficient