OLC & OLCT 100


Fixed Gas Transmitter

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Designed for the detection of explosive gases, toxic gases or oxygen, this fixed gas detector comes with a Wheatstone bridge output (OLC 100) or 4-20mA output (OLCT 100). Whatever your application Oldham offers a solution: catalytic, electrochemical, semiconductor, or poison control version.
ATEX-approved; these fixed gas detectors are available in explosion safe or intrinsically safe versions, promoting reliability, durability and ease of use. In addition to this range the OLC/OLCT 100 offers an infrared sensor, which allows it to be used in more severe environmental conditions, where the presence of poisons could harm the use of a catalytic sensor. With a 3-year warranty on the sensor and electronics, the OLCT 100 XP-IR will provide reliability and extended lifetime.
SIL 2 certified according to EN 50402, the 100 series is very safe fixed gas detector. As an example, the Probability of Failure on Demand (PFD) of combustible versions is 1 out of 418 for the catalytic version and 1 out of 2857 for the infrared version.

Popular applications for the OLC and OLCT 100 Gas Detectors include:

• Steel Mills
• Petrochemical facilities
• Chemical industry
• Pharmaceutical industry
• Food industry
• Refrigeration industry
• Water treatment

Product variations:

OLCT 100 XP: Explosion-proof version and equipped with a catalytic, electrochemical or semiconductor sensor, for detection of explosive, toxic gases or oxygen.
OLCT 100 IS: Intrinsically safe version and equipped with an electrochemical sensor for detection of toxic gases or oxygen.
OLCT 100 XP IR: Explosion-proof version and equipped with an infrared sensor for detection of explosive gases or CO2.
OLCT 100 XP HT: High-temperature explosion-proof version, for detection of volatile gases up to 200°C.

Please contact us for a quotation and for up to date lead times. Our detectors are sourced direct from the manufacturer so that the sensors have the longest possible life span when they arrive with you.

Remember, to ensure that your detectors are working at peak performance and offering the maximum protection to you and your staff, we offer a full calibration and service facility here at Cambridge Sensotec. Please contact us at sales@cambridge-sensotec.co.uk for more information.


• 4-20 mA analogue transmitter without display
• SIL2 capability for LEL, O2, CO, H2S, NH3, CO2
• Detects combustible, toxic or refrigerant gases and O2
• Available with electrochemical, infrared or semi-conductor sensors
• Designed for industrial applications
• Available in explosion-proof or intrinsically safe fixed versions, and stainless steel
• New XP IR infrared sensor or catalytic sensor
• A high-temperature version allows operation up to 200°C


• AsH3
• C2H4O
• ClO2
• CO
• CO2
• COCl2
• H2
• H2S
• HCl
• NH3
• NO
• NO2
• O2
• PH3
• SiH4
• SO2

Product Certification

• CE
• ATEX (1GD and 2GD)
• Marine
• SIL2