daga1600
Posts: 7
Joined: Tue Apr 30, 2019 12:00 pm

Ex-zone?

Tue Apr 30, 2019 12:04 pm

Have you guys used raspberry pi 3/Zero W in industri?

What about ex-zone? Is there special case you can buy for your processor or isn´t it dangerous for this zone? Help me
Kind Regards

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 22080
Joined: Sat Jul 30, 2011 7:41 pm

Re: Ex-zone?

Tue Apr 30, 2019 12:10 pm

Raspberry Pi have never done any testing for ex-zones, so we cannot comment on it at all. In fact, I would recommend not using them in such an enviroment without doing you own very thorough testing.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
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daga1600
Posts: 7
Joined: Tue Apr 30, 2019 12:00 pm

Re: Ex-zone?

Tue Apr 30, 2019 12:15 pm

Mnn, I just want to build a QR-code decoder with Raspberry pi in a chemical industri . Do you have any advice other devices? Like arduino?

scotty101
Posts: 3573
Joined: Fri Jun 08, 2012 6:03 pm

Re: Ex-zone?

Tue Apr 30, 2019 1:39 pm

I worked in a company doing Ex equipment for my summer Uni placement over 10 years ago so this is partially remembered information and not professional advice.

Something like the Pi could be used but it would require a sufficiently robust enclosure to prevent the ingress of explosive gases and that any inputs/outputs are "intrinsically safe" and galvanically isolated. A barcode scanner behind a pane of glass could be operated in this type of environment.
All of this does depend on the classification of the Ex zone which included factors such as the type of gases likely in the area. Hydrogen has a higher rating than hydrocarbons such as methane.
Also depends on operating temperature of the devices but without access to the appropriate standards, I can't tell you what the temperature limits are.
It's a complex area. A device like a Raspberry Pi/Arduino on its own can't be rated as safe for Ex zones as it is the entire system including any power supplies, enclosures, cables etc that need to be rated.

My advice to you would be to seek out a suitably qualified consultant or company who specialises in this area for their advice. Not likely to be cheap.
Electronic and Computer Engineer
Pi Interests: Home Automation, IOT, Python and Tkinter

daga1600
Posts: 7
Joined: Tue Apr 30, 2019 12:00 pm

Re: Ex-zone?

Fri May 03, 2019 8:07 am

Thank you for all information

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