Oldham OLCT 100 Gas Detector - Infrared

Name: Oldham OLCT 100 Gas Detector - Infrared – Datasheet & Quote
Brand: Oldham

Overview

The Oldham OLCT 100 gas detector in its IR version is an infrared CO2 or combustible gas detector and transmitter built to withstand harsh environments such as offshore platforms, petrochemical and chemical industries, naval installations, and wastewater treatment plants.

The detector provides a 4-20 mA analogue transmitter output for direct connection to gas detection controllers and safety systems, with SIL2 capability for safety instrumented applications.

Engineering & Design

Infrared technology is often the only solution for environments where catalytic sensors fail, because the measurement does not depend on combustion and is resistant to poisons. The OLCT 100 uses a double source / four beam optical arrangement with heated optics and dirty optics compensation, maintaining accuracy as contamination builds on the window.

The IP67 enclosure suits outdoor and offshore installation, and non-intrusive calibration allows the detector to be adjusted without opening the housing, reducing the risk of moisture ingress and simplifying maintenance.

Key Features

Infrared CO2 or combustible gas detection
4-20 mA analogue transmitter output
SIL2 capability
IP67 enclosure
Double source / four beam optics
Heated optics and dirty optics compensation
Resistant to poisons
Long lifespan exceeding 10 years
Non-intrusive calibration
Low maintenance design

Applications

Offshore platforms
Petrochemical and chemical plants
Naval installations
Wastewater treatment plants
Onshore and offshore gas detection

Specifications

Specification	Value
Manufacturer	Oldham
Model	OLCT 100 IR
Measured Gases	CO2 or combustible gas
Technology	Infrared
Output	4-20 mA analogue
Safety	SIL2 capability
Protection	IP67
Optics	Double source / four beams, heated
Calibration	Non-intrusive
Lifespan	Greater than 10 years

For fixed gas detection projects in harsh environments, the Oldham OLCT 100 gas detector is a proven choice, and Seven Star LLC supplies the Oldham OLCT 100 gas detector with verified specifications for your site.

For fixed gas detection projects across the Gulf, the Oldham OLCT 100 gas detector is a commonly specified instrument. It provides the 4-20 mA signal your controller expects, and Seven Star LLC supplies the OLCT 100 with project documentation and engineering support.

For multi-detector projects, the Oldham OLCT 100 gas detector configuration is repeated across the installation with consistent documentation.

Why Seven Star LLC

Seven Star LLC supplies the Oldham OLCT 100 IR gas detector for fixed gas detection projects across the Gulf, with verified specifications and technical support. Our team assists with gas type selection, calibration planning, and integration with detection controllers.

We serve oil and gas, petrochemical, marine, and utility customers with reliable B2B supply of gas detection equipment throughout the GCC.

Installation & Operation

Installation of the OLCT 100 IR follows the standard fixed gas detection practice: the detector is mounted at the monitoring point and connected to a gas detection controller over the 4-20 mA loop. The IP67 enclosure allows outdoor and offshore mounting, and the non-intrusive calibration method keeps the housing sealed during adjustment.

Routine operation is essentially maintenance-free because the infrared source and detector arrangement is immune to the poisoning that affects catalytic sensors, and the heated optics keep condensation from disturbing the measurement.

Supply Chain & Sourcing

Seven Star LLC sources the Oldham OLCT 100 IR directly through the manufacturer distribution network, giving Gulf customers access to current production units and the full documentation package.

For projects involving multiple detectors, we support spare parts planning, calibration gas supply, and the interchangeability checks that keep installed gas detection systems maintainable.

Daily operation of the detector is limited to verifying the controller reading and the fault status. Because the IR measurement does not consume the sensing element, the long-term cost of ownership is lower than catalytic detection in poisoned environments.

Calibration intervals are established by site practice and gas detection standards, and the non-intrusive procedure allows bump testing and span adjustment with the housing sealed. For maintenance teams, the diagnostic information from the transmitter supports early identification of optics contamination and component ageing.

Request a Quote for Oldham IR Gas Detector OLC100 / OLCT 100

For the Oldham OLCT 100 gas detector or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your measurement range, connection and configuration, and our specialists will respond with a detailed commercial proposal and the relevant Oldham documentation.

Detector Siting and Commissioning

Good infrared detection starts with correct siting. Combustible hydrocarbon vapours heavier than air collect near grade, while lighter gases and hot releases rise, so the mounting height should follow the density of the target gas and the site gas detection philosophy. Place each head close to likely leak sources such as pump seals, compressor skids, flanged manifolds and loading points, and orient it so that the optical window is protected from direct water jets and heavy sand deposition.

During commissioning, confirm the gas type and range on the nameplate against the cause-and-effect matrix, check the loop wiring and screen termination at the controller end, and verify that the controller alarm thresholds match the detector range. Zero the head in clean air, then apply a certified test gas through the calibration accessory and record the response. A documented zero and span check at hand-over gives the maintenance team a baseline for later trending.

Troubleshooting Checklist

Reading drifts or fault flag appears: inspect the optical window for dust, salt film or insect nests and clean it according to the manual before recalibrating.
No signal at the controller: measure loop current at the terminals and check supply voltage and cable continuity before suspecting the head.
Slow response to test gas: check that the calibration adaptor is seated correctly and the flow rate is as specified.
Negative reading after a sand storm: contamination of the optics is the usual cause; the dirty optics compensation extends the interval, but it does not replace cleaning.

Applications in Oman and the GCC

Desert and coastal sites in the region combine high ambient temperature, humidity swings, salt-laden air and blowing sand. These conditions shorten the life of catalytic sensors and increase the value of infrared measurement. The Oldham OLCT 100 gas detector is a practical fit for wellhead and gathering stations in the interior of Oman, gas processing facilities, refineries and terminals at Sohar and Duqm, and pumping stations on water and wastewater networks where hydrocarbons or CO2 must be monitored.

Sourcing Through Seven Star LLC

Seven Star LLC supplies OLCT 100 IR heads and related accessories to operators, EPC contractors and maintenance teams across the GCC. Send the existing tag list or the model code from the nameplate, and our engineers will check the gas type, range and certification against your requirement before we issue an offer.

Related Products

Fixed gas detection for industrial sites is what Oldham has been known for since the company started in Arras, France, in 1948. Detector heads from the OLCT family and the MX controllers that supervise them are common in process plants and utilities. Seven Star LLC sources and supplies Oldham fixed gas detectors and gas detection controllers for sites in Oman. Current units are sold under the Teledyne Gas and Flame Detection name.

Oldham gas detector models listed here

The page lists the Oldham OLCT 100 fixed gas detector, including its infrared version, the OLCT 710 fixed gas detector and the MX 62 gas detection controller. The OLCT 100 is a 4-20 mA transmitter family offered for combustible gases, toxic gases and oxygen, depending on the sensor fitted, while the OLC 100 variant has a Wheatstone bridge output. The MX 62 takes the signals from the detectors, and applies the configured alarm logic.

Ordering an Oldham sensor or detector: what we need

Send the reference number from the detector label, the gas and measuring range, and the hazardous-area marking. For a replacement Oldham sensor, add the detector version and the number printed on the cell, since sensor blocks differ between versions. For an MX 62, list the number and type of detector inputs, the modules fitted, and the supply voltage. Projects in the GCC that need a specific approval should state it.

Browse Oldham products by category: Fire & Gas Detector, Logic Controller.

Frequently Asked Questions