Commercial links (alphabetical order):

See Manufacturers page for companies offering more detailed technical information on zone classification of hazardous areas and related topics

• AB-CO Purging Systems for Div. 1 and Div. 2 applications.
• ABTECH products include a range of enclosures for use in a variety hazardous environments and can be supplied with a number of certificates, including; ATEX Ex‘e’ to BS EN 60079-7 (Zones 1 & 2) EEx‘nA’ to BS EN 60079-15 (Zone 2) and NEMA 4X (CSA, UL & FM class 1, div 2) and GOST.
• Akron Electric explosion-proof electrical enclosures.
• AMOT Controls specializes in Hazardous Area & Industrial Control Systems and Panels to IEC, CENELEC, ATEX & NEC Standards.
• ASI cable glands.  EEx e and ATEX rated cable glands and stain relief fittings for applications in the mining, fertilizer, chemical, offshore, petro chemical etc. with increased safety level.
• ATEC Training & Certification Services is a North American based company located in Houston, Texas specializing in training, compliance and product certification. The company was formed to provide Hazardous area Solutions by providing specialist training & compliance services for engineers working with products & systems in Hazardous Area locations.
• ATHEX bvba The name Athex is a short form compilation of the different disciplines we are active in. eArth & earth control equipment, Tankfarm equipment, industrial Heating & burner controls, Explosion safe materials, X = service, advice, problem solving.
• A.T.X. (part of EGS Electrical Group)
• Bebco Industries Purging and Pressurization Systems, "EX" HVAC & Custom Enclosures
• BEVI Ex-e Increased Safety Motors - Explanation of Limiting Temperature, Initial Sharing Current etc.
• Bifold-FluidPower Ltd. U.K. Hydraulic & Pneumatic directional control valves, Solenoid valves and air preparation equipment, including products with explosion protection certification and listings by EECS (BASEEFA), ATEX, IEC, UL, CSA. Approvals/listings include EExia, EExd, EExme, Class 1 Division 1.
• CMP Products - one of the world's leading specialist manufacturers of cable connectors and accessories.
• CorDEX Instruments manufactures hand-held inspection & NDT devices for use within hazardous (potentially explosive) environments, with certification including ATEX, IECEx and CSA
• EGS / Appleton - products, such as increased safety lighting and cable entries.
• Epsilon Compliance Limited - now part of Intertek.
• EUTEX stocks a wide variety of International, European & American certified products, such as electrical cable, cable glands, lighting, control gear, junction boxes.
• ExDirect Explosion-proof instrument housings.
• Exloc Instruments, Inc. specialize in products which are outside the scope of the major and mainstream process control instrument vendors.
• Explosion Research Ltd. - Alberta, Canada. Also "A must read for 'intrinsically safe' design engineers - MINIMUM SPARK IGNITION ENERGIES --- A MATHEMATICAL MODEL.
• Ex-Protecta - Manufacturers of Weatherproof (Ingress Protected) & All type of Ex protected (Flameproof, Increased Safety,Intrinsically Safe, Purge protected,Encapsulated, Non-sparking & other specially protected ) electrical & electronic products. India.
• Extronics - a leading UK supplier of electrical and electronic intrinsically safe and explosion proof hazardous area equipment.
• FEEL Ex-e GRP enclosures:  Data sheet (large - slow to transmit): FEEL  Flameproof Electrical Enclosures Limited (UK).  EEx-e certified. (FEEL UK web page.)
• F-RAMS® Fuel Registration and Management System - Certified Intrinsically safe for hazardous (classified) locations by Factory Mutual Research Corporation for Class I, Division I, Group C and D for Class T3=200^oC with Tamb=75^oC.
• Flowmeter Directory -  Flowmeterdirectory.com is the most comprehensive web portal on flowmeter technology, manufacturers, suppliers, and system designers. The site contains both commercial and non-commercial information on flowmeter types, manufacturers, suppliers, articles and technology. We always welcome useful user input.
• Gastronics   - The Gastronics True Wireless Explosion Proof Gas Monitors are available for measuring H2S and Combustible Gases for Hazardous Locations.
• FT Sensors  - FT702IS Intrinsically Safe Airflow Measurement System - ATEX Certified: EEx ia IIC T5
• Hazloc Heaters  - Manufacturer of Industrial Unit Heaters for Hazardous and Severe-Duty Locations, Calgary, Alberta, Canada.
• Heatex  - Electrical Heating and Control Equipment, U.K.
• Hohner Automation Ltd.  Intrinsically Safe Encoders.
• InnoScan Computing A/S - Industry PC for Ex zone 1 & 2 with special barrier circuit for the keyboard.
• Instco  - Instruments & Controls (Hull), U.K.
• J.B. Systems Stockists and authorised assemblers for ATX ATX EExd Explosion Proof enclosures. Finished enclosures carry an LCIE/CENELEC certificate.
• Jim Munro International Compliance Pty Limited  - services, including: Assistance to organisations on certification, Assessments of laboratories and certifying bodies, Development of standards, Auditing of manufacturers, Training and Assistance to organisations on OHS
• KERMAZ - EEx-d & EEx-e boxes, components and accessories.
• Lord Electric
• Meltric Corporation - Plugs and receptacles, including the DXN models, hazardous duty plugs and receptacles that allow users to make and break under load. Certified for Class I Div II locations.
• Nematron industrial flat panel monitors and industrial computers that are approved for Class I Division 2 in both the US and Canada.
• Newson-Gale - leading the way in hazardous area static control. Use this form to get an excellent the 'Grounding & Bonding Applications Booklet'.
• Offshore Technology List of suppliers to this industry.
• OMEGA Temperature Measurement - Intrinsic safety.
• Opti-light Explosion proof lighting and Explosionproof "Zone-0" luminaires.
• Pentair Industrial Heat Tracing Solutions offer a range of trace heaters, including self-regulating, power-limiting, skin effect, series resistance and mineral insulated. The leading provider of electric trace heating solutions for all industrial and commercial uses.
• Peppers Cable Glands Limited including technical information, such as notes on EN50262 standard for glands.
• Pioden Controls - Intrinsically Safe High Pressure Transducer BP70. Canterbury, U.K.
• Precision Digital - Precision Digital supplies digital panel meters, process meters, batch controllers and rate totalizers. The majority of Precision Digital's products have been approved and/or certified as compliant to UL, CSA, FM, ATEX, IECEx, CE, and NEMA standards.
• PROFIBUS-PA Fieldbus system - intrinsically safe  - a revolutionary development in instrumentation and control.
• Raxton Limited, U.K. - Stainless steel cable glands and accessories
• Raychem HTS - Heating Cables  - (see Tyco Thermal Controls) - includes Hazardous location electric heating cable products and accessories.
• Remora  - Remora Electrical Limited, U.K.
• Rose+Bopla Enclosures
• RUFFNECK Heaters Calgary, Alberta, Canada.
• SKF has a new, intrinsically safe, pocketsize thermometer ThermoPen, TMTP 200Ex, that meets ATEX requirements and can be used in potentially explosive atmospheres caused by mixtures of air and gasses
• Standards Council of Canada - list of Accredited Certification Organizations.
• Teleindustria  - Explosion-proof telephones, Italy.
• TE Connectivity - Position sensors and low pressure Class I Division 2 stainless steel pressure transmitters for use in hazardous areas.
• Thermon  - including hazardous location heating cable products.
• Tiger-Vac - With forty years of experience, established internationally as a manufacturer of high-quality industrial, explosion proof, cleanroom and ATEX, IECEx, NFPA-NEC compliant vacuum cleaner systems for contamination controlled environments & hazardous locations.
• Turck - Intrinsically-safe equipment. Select 'Tutorials' to download 'Understanding Hazardous Area Sensing'.
• Tyco Thermal Controls - the leading provider of electric heat tracing solutions for all industrial and commercial uses.
• Videotec - Explosion-proof housing for video camera, Italy.
• VisiWear - EX WI-FI Access Point.
• Walsall Ltd. -  explosion protected products ranging from lighting and terminal enclosures through to local control, distribution and complex control systems designed and built to order, with all products approved to the very latest European / worldwide harmonised standards, ATEX 94/9/EC, IECEX & GOST-R.
• Western Electric motors.

Broken links  (kept here in case these companies' web pages resurface)

• IRSST - list of several links to Laboratory Accreditation sites.
• Motion Control Systems, a distributor of Sensors - Intrinsic Safety by Robert Trask, P.E.
• Electrical Products Marketing, Inc.  - Houston, Texas.  "Tech. Stuff" information page. (Link not broken but does not allow 'nesting' and Techstuff.htm page was removed.)
• Wirac Automation Limited U.K. with information on the European Machinery Directive (EMD) and some notes on Hazardous Area Installations.

Note, these links do not necessarily include detailed technical information on the Zone Classification system.  They are included as a courtesy, and are not verified for being up to date.

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