OLCT100 Gas Detector | Toxic and Combustible Gas Detector

Technical Description – OLCT100 Gas Detector

Versions and Configurations

Multi-Technology Gas Detection

To suit virtually any industrial gas hazard, the OLC(T) 100 supports a wide range of detection technologies:

• Catalytic bead sensors for combustible gases (0–100 % LEL)
• Infrared (IR) sensors for CH₄, CO₂, SF₆, and refrigerants including R134a, R407F, R449A, R452A, R454B, R1234yf, and R1233zd
• Electrochemical (EC) sensors for toxic gases and oxygen, including hydrogen sulphide (H₂S), carbon monoxide (CO), ammonia (NH₃), chlorine (Cl₂), nitrogen oxides (NO, NO₂), sulphur dioxide (SO₂), hydrogen cyanide (HCN), hydrogen chloride (HCl), phosphine (PH₃), arsine (AsH₃), phosgene (COCl₂), ethylene oxide, formaldehyde, hydrogen, and oxygen (O₂)
• Semiconductor (SC) sensors for solvents and refrigerants including methyl chloride, methylene chloride, ethanol, toluene, isopropanol, MEK, and xylene
• MEMS sensors for combustible gases, with extended sensor life of up to 180 months

As a result of this breadth of sensor compatibility, the OLC(T) 100 acts as a single-platform solution for facilities monitoring multiple gas hazards across diverse process areas.

Hazardous Area Certification and Compliance (Australia / New Zealand)

Across the Australian and New Zealand markets, the OLC(T) 100 is certified for use in hazardous industrial environments under the relevant international standards:

• IECEx certification – the internationally recognised scheme adopted under the AS/NZS 60079 series for hazardous area equipment in Australia and New Zealand
• OLC 100, OLCT 100 XP, OLCT 100 XP IR: Ex db IIC T6 Gb / Ex tb IIIC T85 °C Db IP66
• OLCT 100 XP HT: Ex db IIC T6 Gb (transmitter) and Ex db IIC T4..T2 Gb (sensor)
• OLCT 100 IS Aluminium: Ex ia IIC T4 Gb / Ex ia IIIC T135 °C Db IP66
• OLCT 100 IS Stainless Steel: Ex ia IIC T4 Ga / Ex ia IIIC T135 °C Da IP66
• SIL 2 functional safety certified to IEC 61508
• Metrological performance to IEC 60079-29-1, adopted in Australia and New Zealand as AS/NZS 60079.29.1
• Electromagnetic compatibility tested to recognised international standards

Robust Construction for Harsh Industrial Environments

As standard, the OLC(T) 100 features an epoxy-coated aluminium enclosure. However, an optional 316L stainless steel housing is also available for highly corrosive environments such as marine, wastewater treatment, and food processing applications.

In addition, all sensor bodies are made from 316 stainless steel for enhanced durability. The detector provides IP66 ingress protection and is therefore suitable for both indoor and outdoor installation. Furthermore, cable entries are available in M20 or ¾ NPT to suit regional installation standards.

Electrical and Signal Specs

Below are the key electrical specifications for the OLC(T) 100 range:

• Supply voltage: 11–32 VDC (depending on version)
• Average consumption: 23.5 mA to 340 mA
• Output signal: Linear 4–20 mA analogue output
• Operating pressure: Atmospheric ± 10 %
• Wiring: 2 or 3 active wires with shielded cable

Industrial Applications

Throughout Australia and internationally, the OLC(T) 100 fixed gas detector is widely deployed across high-risk industries, including:

• Steel mills and metal processing
• Petrochemical and oil & gas facilities
• Chemical and pharmaceutical manufacturing
• Food and beverage production
• Commercial and industrial refrigeration
• Water and wastewater treatment plants
• New energies, hydrogen, and clean technology applications