Experts in gas detection and respiratory protection
Generic selectors
Exact matches only
Search in title
Search in content
Search in posts
Search in pages

4-20 mA detector/transmitter with relay outputs and RS485 communication. Pre-calibrated sensors to detect oxygen, flammable and toxic gases.

Fixed gas detector Oldham OLCT80
  • Detection of O2, CO, CO/H2 NUL, H2S, NO, NO2, SO2, Cl2, H2, HCl, HCN, HF, NH3, ETO, O3, PH3, ClO2, SiH4, COCl2, AsH3, CH4, H2, NH3, VOC
  • Alarms: 2 gas alarms (alarm 1, alarm 2) and 1 fault alarm
  • Inputs and outputs: 4-20 mA with signal smart treatment
  • Approval: ATEX – II 2 GD, INERIS 03ATEX0240X, compliance with EN50270 standard, IP66
Request a quote

Additional information

Designed according to the most demanding requirements, the Oldham OLCT 80 detector transmitter is one of the most reliable fixed gas detector on the market. This fixed gas detector is available in remote version and uses intrinsically safe or fireproof sensors according to the target gases. The OLCT 80 has been especially designed to detect O2, the combustible, toxic and refrigerant gases: AsH3, C2H2, C2H4, C2H4O, C2H6, C2H6O, C3H6, C3H6O, C3H8, C3H8O, C4H10, C4H10O, C4H6, C4H8O, C5H12, C6H14, C6H6, C7H8, C8H10, CH20, CH3OH, CH4, Cl2, ClO2, CO, CO/H2 null, CO2, COCl2, F2, H2, H2S, HCl, HCN, HF, N2H4, NH3, NO, NO2, O2, O3, PH3, SiH4, SO2 and the volatile organic compounds (VOC).


Developed to meet the most demanding requests from industries, the OLCT 80 detector transmitter is a powerful and cost effective fixed gas detection solution. This high-end gas detector can be used in ATEX zone 1 and features a line-of-sight range up to 3 km.


This multi-function triple head fixed gas detector is equipped with a digital display, three alarm relays for high, low and fault alarms and two 4-20 mA inputs. Several other input and output types are also available: analog, TOR, RS485 Modbus.


The calibration of the OLCT 80 is non-intrusive and can be performed by only one operator either in automatic mode at the sensor location or in semi-automatic mode with confirmation at the gas detection controller.


Moreover, as the high-end gas detection technologies used by the OLCT 80 detector transmitter require low power, the gas detector is very energy efficient. This way, fixed gas detection operation costs are reduced.


According to the target gases, this detector transmitter can be equipped with XP IR infrared sensors as well as catalytic, electrochemical or semi-conductor sensors. The OLCT 80 can furthermore be configured in standard, stand alone or digital versions.

Fixed gas detectors

Manufacturer : Oldham

Detected gas: 1,3-Butadiene - 2-Butanone - Acetonitrile - Acetylene - Acrolein - Acrylic acid - Acrylonitrile - Allyl alcohol - Ammonia - Arsine - Benzene - Bromine - Butane - Butyl acetate - Butyl acrylate - Butyl alcohol - Carbon dioxide - Carbon disulfide - Carbon monoxide - Chlorine - Chlorine dioxide - Chloromethane R40 - Cumene - Cyclohexane - Cyclohexanone - Cyclopentane - Diesel - Diethyl ether - Dimethylether - Dodecane - Ethane - Ethanol - Ethyl acetate - Ethyl acrylate - Ethyl chloride - Ethyl mercaptan - Ethylene - Ethylene oxide - Forane FX56 - Formaldehyde - GPL - Heptane - Hexane - HFO-R1234yf - HFO-R1234ze - Hydrogen - Hydrogen chloride - Hydrogen cyanide - Hydrogen fluoride - Hydrogen sulfide - Isobutane - Isobutene - Isopropyl alcohol - Kerosene - Methane - Methanol - Methyl acetate - Methyl mercaptan - Methyl methacrylate - Methylamine - Methyl isobutyl ketone MIBK - Naphta - Naphthalene - Natural Gas - Nitric oxide - Nitrogen dioxide - Nonane - Octane - Oxygen - Ozone - Pentane Phosgene - Phosphine - Propanal - Propane - Propylene - Propylene oxide - Freon / Refrigerants - Silane - Styrene - Sulfur dioxide - Super (SP95) - Toluene - Trimethylamine TMA - White spirit - Xylene

Contact us