Description
OLDHAM OLCT20d
Reliable fixed gas monitoring for industrial environments with flexible sensor options and robust hazardous-area protection
| Brand | OLDHAM |
| Model | OLCT20d |
| Voltage | 16-30 V DC, nominal 24 V DC |
| Country of Origin | France |
| Weight | Approximately 1.2 kg |
| Dimensions | Approximately 200 x 150 x 100 mm |
| Warranty | 6 months |
| Certifications | ATEX, IECEx, CE |
| SKU / MPN | OLCT20d |
| What’s in the box | OLCT20d gas detector, sensor, mounting accessories, installation manual |
| Detection Type | Fixed gas detection and measurement |
| Output Signal | 4-20 mA analog output |
| Sensor Compatibility | Electrochemical, catalytic, or infrared sensors |
| Display | Integrated digital display |
| Ingress Protection | IP66 |
| Operating Temperature | -20 to +50 °C, sensor dependent |
Key benefits: Continuous gas measurement, broad sensor compatibility, 4-20 mA integration, rugged enclosure, clear local indication, certified hazardous-area operation
Typical applications: Chemical plants, oil and gas facilities, wastewater treatment, boiler rooms, industrial process areas, and confined-space monitoring
Lifecycle: Active industrial product with serviceable sensors and ongoing maintenance support
Our Advantages
Exact match for many brands
We make replacements easy with an exact match for almost any brand.
We use OEM catalogs to match your part number
Don't worry about ordering the wrong part by matching your part number with our OEM catalogs.
Competitively priced
Shop with confidence knowing we are offering very competitive pricing!
Orders usually ship the same day
Rest assured your order will arrive as soon as possible knowing we usually ship the same day.
Individually inspected
Before any package is shipped we carefully inspect every product to ensure quality.
Guaranteed for one full year
All of our New Surplus and Reconditioned products come with a 1 year warranty.
Run Business
Building a reputation for quality products at a reasonable price. Our inventory is far more extensive than what can be represented on our web site, so please call one of our knowledgeable salesmen with your specific needs.








Susan Y. –
Very sturdy enclosure, IP rating seems genuine. Good value for money.