Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to your UK and international projects.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access Control
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
Published 31 Aug 2026
Ex d, Ex e and combined Ex d e markings describe different methods of protecting electrical equipment intended for use in potentially explosive gas atmospheres. An Ex d beacon uses a flameproof enclosure designed to contain an internal ignition and prevent flame propagation into the surrounding atmosphere. Ex e...
Published 27 Aug 2026
What Makes a Torch Intrinsically Safe? ATEX & IECEx Explained Intrinsically safe torches are designed for use in hazardous areas where flammable gases, vapours or combustible dusts may be present. Unlike conventional torches, intrinsically safe lighting is engineered to control potential ignition sources so that the equipment does not...
Published 25 Aug 2026
High-Temperature and Demanding Electrical Heat Tracing Applications Quick Navigation Mineral-Insulated Cable Overview How MI Cable Is Constructed High-Temperature Duties High Output & Heat-Up Duties Long Circuits & Engineered Resistance Harsh Industrial Environments Hazardous-Area Applications MI vs Other Cable Technologies When MI Cable May Not Be Required Design & Installation...
Published 24 Aug 2026
Hazardous area beacon lens colours help personnel distinguish between alarms, warnings, equipment states and process conditions. Red, amber, green, blue and clear signals can each communicate a different message when used within a properly defined alarm philosophy. However, a beacon colour does not have one fixed meaning in every...
Published 17 Aug 2026
Steady, flashing, strobe and rotating beacons communicate different types of warning and status information. Although each produces a visible signal, the way that signal attracts attention and conveys meaning can vary considerably. A steady beacon provides continuous illumination. A flashing beacon switches between illuminated and non-illuminated states. A strobe...
