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.
• Akron Electric explosion-proof electrical enclosures.
• AMOT Controls specializes in Hazardous Area & Industrial Control Systems and Panels to IEC, CENELEC, ATEX & NEC Standards.
• 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.
• EGS / ATX products, such as increased safety lighting and cable entries.
• Epsilon Compliance Limited - includes Basic Techniques of Intrinsically Safe.
• EUTEX stocks a wide variety of International, European & American certified products, such as electrical cable, cable glands, lighting, control gear, junction boxes.
• Explosion proof Equipment (was L & W Equipment): air conditioning systems and enclosures.
• 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.
• FT Sensors  - FT702IS Intrinsically Safe Airflow Measurement System - ATEX Certified: EEx ia IIC T5
• GLS-Global - offices in Houston, TX and Melbourne, Vic, AU specializes in IEC and NEC hazardous location lighting products.
• HazLoc Computer Systems -- HazLoc Computers for Hazardous Areas by Computer Dynamics. Custom solutions to the Oil & Gas markets, workstations, industrial computers and monitors, hazardous area operator interface, HMI control, Zone 1, Class I Division 1 & 2
• 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
• Macro Sensors - PTI 750 series 2 wire, 4-20mA position transmitters for use in hazardous locations, certified by Factory Mutual (FM) for use in Class I,II,III, Division 2,2, Group A,B,C,D,E,F,G, Type 4X locations.
• 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.
• OMEGA Temperature Measurement - Intrinsic safety.
• Opti-light Explosion proof lighting and Explosionproof "Zone-0" luminaires.
• 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.
•   - Explosion-proof switches sensors/transmitters for machinery or provide industrial control information in hazardous environments such as mines, petrochemical facilities and explosive plants.
• 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.
• Thermon  - including hazardous location heating cable products.
• 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. -  Walsall are the worldwide electrical control panel manufacturers, these customised control panels in enclosures are manufactured from cast iron, cast aluminium and cast stainless steel.
• 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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