Is there an intrinsically safe combustible dust monitor for wood pellets?

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The discussion centers on the challenge of finding an intrinsically safe combustible dust monitor specifically for wood pellets, with a required capacity to handle concentrations of 50g/m^3 in a coal bunker. Participants express frustration over the lack of suitable monitors that meet both safety and performance criteria. Suggestions include using older technologies like the Davis lamp or exploring optical monitoring methods, which could be safer options. A specific monitor was initially considered but found unsuitable due to its lower dust capacity. The conversation highlights the need for effective and safe monitoring solutions in environments with combustible dust.
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I have been tasked with what seems an almost impossible feat. It sounds simple but for some reason it is not.

I am looking for a device that can monitor combustible dust, in this case wood dust from pellets. It must be able to handle concentrations of 50g/m^3. The area to be monitored is a coal bunker, roughly 80’ tall and 20’x50’.

And most important it must be intrinsically safe! This has been my biggest problem. I have found a handful of suitable monitors yet they are not intrinsically safe. Who designs a combustible dust monitor that could end up being the source of an explosion?!

Any help would be greatly appreciated.
 
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These guys might have something that would suit your needs:

http://www.omega.com/temperature/Z/pdf/z128-130.pdf
 
Travis_King said:
These guys might have something that would suit your needs:

http://www.omega.com/temperature/Z/pdf/z128-130.pdf

Unfortunatly they don't deal with dust monitors.
 
Would the old Davis lamp perhaps work for you?
It was admittedly used for combustible gas, rather than dust, but I would think that fine dust would be pretty equally diffused in a factory setting and would pass pretty reliably through the screen mesh of a Davis lamp.
 
If the coal dust is the only particulate matter in the air in that enclosure, maybe think about using a scanning laser beam and optical monitoring to figure out the density of dust in the air... Very intrinsically safe.
 
berkeman said:
If the coal dust is the only particulate matter in the air in that enclosure, maybe think about using a scanning laser beam and optical monitoring to figure out the density of dust in the air... Very intrinsically safe.

Yes it would work, But I can't find a product that exists.
 
Something like this? http://www.ducon.com/MIP%203188AZL.php
 
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etudiant said:
Something like this? http://www.ducon.com/MIP%203188AZL.php

That monitor was looking ideal for the application, until I noticed in the specifications: "Maximum dust = 2g per cubic liter. The OP is asking to monitor up to 50g per cubic liter.
 
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Bobbywhy said:
That monitor was looking ideal for the application, until I noticed in the specifications: "Maximum dust = 2g per cubic liter. The OP is asking to monitor up to 50g per cubic liter.

No, per cubic meter! That's 0.05 g/L.
 
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OOPS! Sorry. Thanks for catching my mistake.
 
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etudiant said:
Something like this? http://www.ducon.com/MIP%203188AZL.php

Very Intresting. I will contact the manufacturer! Thanks!
 
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