Chromalox | Heaters & Cables | Hazardous Area & Explosion Proof | ATEX IECEx Certified


Hazardous Area & Explosion Proof Electrical Heaters

Heaters & Heating Cables

Chromalox are a world leader in the manufacturer of explosion proof and hazardous area heating solutions, including Ex e Increased Safety and Ex d Flameproof certified electrical heaters according to ATEX Directive for use in Zone 1 and Zone 2 locations – Thorne & Derrick, Experts in Equipment for Explosive Atmospheres, are stockists and suppliers of Chromalox heaters in the UK including ATEX and IECEx certified electrical heating products.

With headquarters in Pittsburgh, Pennsylvania, Chromalox have a presence in six continents and more than 2,000 authorised distributors worldwide providing rapid service and support of specialist electrical heating equipment.

Chromalox invented electric heating technology when Edwin L. Wiegand, a self taught engineer, had a patent in 1915 for a resistance heating element embedded in an insulating refractory and enclosed in a metal sheath. Today they develop advanced industrial and hazardous area heating solutions for explosive atmospheres including heat tracing cables, circulation heaters, immersion heaters, fan heaters, air heaters and component heating technologies.

Chromalox Industrial Heaters

Chromalox Hazardous Area Industrial Heaters – ATEX & CSA certified for safe installation in Zone 1 and Zone 2 hazardous areas.

Chromalox Hazardous Area Industrial Heaters

Industrial heaters are available for use within both safe and hazardous areas with a full range of international certifications covered including ATEX, IECEx, CSA, SAA, BKI, EVPU and GOST.

Chromalox line of heat tracing cables utilise a number of different cable heating technologies to ensure all frost protection and process temperature maintenance applications can be satisfied – this includes self-regulating, constant wattage, mineral insulated and PFA insulated heating cables. Also available are heat tracing accessories to aid installation and monitoring with ambient and line sensing thermostats, junction boxes, splice kits and fixing tape which are also suitable for hazardous area applications.

Chromalox Heat Trace Cables & Product Overview 

Listen to Chris Myers, Product Manager of Chromalox Heat Trace, presenting an overview of the Chromalox heat trace products for commercial, industrial and hazardous area pipework heating.

In addition to heat tracing cables, Chromalox specialise in a broad range of industrial and hazardous area heaters:

Chromalox Industrial Process Heaters

Chromalox Process Heaters – Industrial & Hazardous Areas

Chromalox Brand Value 

“To pioneer the new thermal technologies and shape the future of industrial heating.”

Chromalox CVEP Hazardous Area Convection Heater

Chromalox CVEP Hazardous Area Convection Heater

Chromalox Hazardous Area Convection Heater

Chromalox CVEP is a wall mounted convection heater which is ideal for industrial heating applications within a Zone 1 or Zone 2 hazardous area location where volatile flammable liquids, gases or vapours may be present. The CVEP is UL listed and CSA Certified along with ATEX and GOST approvals.

Constructed using low watt density heating elements with copper and aluminium fins, housed within heavy duty corrosion resistant polyester powder coated 16 gauge steel. An explosion proof junction box protects the conduit entry and allows for easy power wiring.

Optionally the CVEP can be factory installed with a thermostat, magnetic contactor or control voltage transformer.

Suitable for supply voltages up to 575V and with power outputs up to 9kW the CVEP is especially suited for heating large industrial premises where high power outputs are a necessity. Typical applications for the CVEP convection heater include:

  • Petroleum Refineries, Gasoline Storage & Dispensing Areas
  • Industrial Areas Using Flammable Liquids In Dip Tanks
  • Petroleum Refineries
  • Dry Cleaning Plants
  • Utility and Natural Gas Plants
  • Aircraft Hangers/Fueling Areas
  • Solvent Extraction Plants
  • Storage Areas For Flammable Products & Batteries
  • Sewage Treatment Plants
  • Hydrogen Atmospheres

Chromalox Product Applications

As Chromalox manufacture a broad range of electrical heating products, they are able to cover almost any environment where heating is required such as building, construction, chemical processing, commercial food equipment, lab, analytical, medical equipment, oil, gas, petrochemical , power, transportation and waste water.

Within the building and construction industry for example, heat tracing cables can be used for frost protection of water pipework, snow melting for roofs and gutters or hot water temperature maintenance for energy efficiency.

Circulation heaters can be used within the chemical industry to to heat steam for large tank heaters which maintain viscous materials at an optimal temperature for pumping or to maintain the temperature of heated water loops for eye wash and safety shower stations.


Chromalox technical manual covering trace heating cable selection, design, heat loss calculation, heat transfer fundamentals and radiant infrared heating theory.

Chromalox Immersion Heaters

Chromalox Heating Solutions

About ChromaloxEdwin L. Wiegand

Founded in 1917, Chromalox initially began producing strip heaters using Edwin L. Wiegand’s resistance heating element patent which was used in a product which became the modern household clothes iron. Stamped with the word “chrome” and using a cement mix to “lock” in the heating element, Chromalox was established.

As the company grew, they continued to develop new industrial heating products, moving into new industries before eventually expanding into global markets by acquiring manufacturing facilities in Grimwood, England and Etirex, France.

Today, Chromalox continues to develop new advanced thermal technologies for the world’s toughest industrial heating applications with an international presence and offices around the world in countries including India, Thailand, Germany, Singapore, and Dubai – their focus is on is on engineering innovative heaters and controls of the highest quality for our customers, just as Edwin L. Wiegand did more than 90 years ago.


Explosion Proof Exd Flameproof Heaters | Exd Radiators | Exe Increased Safety Heaters | Explosion Proof Convection Heaters | Exd Flameproof Heaters | Distributed by Thorne & Derrick | Experts in Equipment for Explosive Atmospheres

Hazardous Area Electrical Distributors

Integrity | Knowledge | Reliability | Electrical HVAC Process Instrumentation Equipment


Thorne & Derrick are leaders in the development and distribution of ATEX & IECEx 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 UK and international projects.

Panels | Plugs | Isolators | Enclosures | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame DetectionProcess InstrumentationProcess Heating | Fans | Security Locking & Access Control 

Hazardous Area Electrical Equipment

Competitive Prices | Extensive Stocks | Technical Support | Express Delivery