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E2E Engineer Discussion Forum » HVAC Building Automation » Explosion Proof Sensors » Re: ATEX intreprutation and Embedment RTD's

ATEX intreprutation and Embedment RTD's

Last post 06-15-2005, 1:01 PM by Livewire. 3 replies.
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  •  05-09-2005, 9:32 AM 197

    ATEX intreprutation and Embedment RTD's

    What is the process that a customer needs to go thru so that they get can get their embedment RTD ATEX certified?

  •  05-11-2005, 9:37 AM 199 in reply to 197

    Cool [H] Re: ATEX intreprutation and Embedment RTD's

    ATEX (ATmosphere EXplosive) certified devices go through an approval process with a regulatory body such as KEMA. Hazardous location questions could be directed to them at email address: hazloc@kema.com

    There are essentially 3 levels of classification: explosionproof, flameproof or intrinsically safe, which allow devices to be used in certain environments. An embedment sensor for bearings is not likely to be capable of getting classified as explosionproof. They are non-incendive devices that can be used in an intrinsically safe system through the use of barrier devices that will prevent excess voltages with spark potential from reaching the sensor. Someone wanting to have their system ATEX certified that contains an embedment sensor will probably need to employ the use of these barriers.
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  •  05-12-2005, 9:07 AM 202 in reply to 197

    Re: ATEX intreprutation and Embedment RTD's

    ATEX certification is required for electrical equipment that will be used in hazardous locations located in the European Union. There are several different protection methods that could be used for embedment RTD's.

    Intrinsic Safety: Requires no approval of the RTD, but the RTD circuit must include a special intrinsically safe barrier. This method is good for Zones 0, 1 or 2 hazardous locations.

    Increased Safety: Requires approval by a "Notified Body" which is a European testing organization similar to UL or FM here in the states. PTB, KEMA and LCIE are examples of notified bodies. Increased safety RTD's do not require an intrinsically safe barrier and can be used in Zone 1 or 2 locations.

    Non-Sparking: Requires approval, but the approval can be run by anyone that has an ATEX approved quality system. Non-sparking equipment can only be used in Zone 2 locations. It requires no intrinsically safe barrier.

  •  06-15-2005, 1:01 PM 247 in reply to 202

    Re: ATEX intreprutation and Embedment RTD's

    Is ATEX certification adequate in the US? We design and manufactuer both domestically and in Europe so it would be easier if we could follow one set of guidelines.

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