QPS - Explosion Research Ltd

Hazardous Location Certification for Canada and the USA

 

 

Pressurization standard 60079-2

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Environment

 

Explosion Risk

MPL (Minimum Protection Level)

Zone

Ex code

 

Minimum protection technique

Description

II  (gas)

Explosive gas 10 to 1000 hrs/yr

Gb

1

Ex px

Pressurized

 

The device can be installed in a zone 1 area; however, it may contain general-purpose-rated components internally.”Purge” units can be obtained to do this or it can be designed in with the enclosure using outside (Clean) air and pressure switches that can shut off the power.

II  (gas)

Explosive gas 10 to 1000 hrs/yr

Gb

1

Ex py

Pressurized

The device can be installed in a zone 1 area; however, it may contain Zone 2-rated components internally.”Purge” units can be obtained to do this or it can be designed in with the enclosure using outside (Clean) air and pressure switches that can indicate clearly that that the device is functioning properly.

II  (gas)

Explosive gas 1 to  10 hrs/yr

Gc

2

Ex pz

pressurized

The device can be installed in a zone 2 area; however, it may contain general-purpose-rated components internally.”Purge” units can be obtained to do this or it can be designed in with the enclosure using outside (Clean) air and pressure switches that can indicate clearly that that the device is functioning properly.