Particle Counters

[LarrySabo]

Found some used on ebay: https://www.ebay.com/itm/Dylos-Laser-Pa ... ondition=4

Thanks for the tip, Nuno! That was an excellent price, so I bought one. I'm pleased to say my clean chamber is at least Class 100. It reached that reading in about 3-5 seconds; it's very responsive meter! :mrgreen:

 

[lcoughey]

I wouldn't trust the .3 and .5 micron stickers on that unit. The Dylos 1100 splits those into small (1 micron) and large particles (5 microns) for the non pro version. The pro version is calibrated for small (.5 microns) and large (2.5 microns).

You are likely fine, just the same Larry, but I think you were duped.

 

[LarrySabo]

We'll soon find out. I have asked the manufacturer what they have to say about them and will report back.

 

[lcoughey]

Great letter. I'm most curious to hear how they respond.

It would seem rather remarkable for them to refurbish a unit and make it better than the pro unit. But, I guess we should give them the benefit of the doubt and hope for a favorable response.

 

[LarrySabo]

I've been told by Dylos that they have recently cleaned units for this reseller, and re-calibrated them for 0.3 and 0.5 microns, and also that this reseller is known to them and honest. :mrgreen:

 

[pclab]

I've been told by Dylos that they have recently cleaned units for this reseller, and re-calibrated them for 0.3 and 0.5 microns, and also that this reseller is known to them and honest. :mrgreen:

Hey Larry

You also have a particle counter from ebay, right? Like this one: https://www.ebay.co.uk/itm/122636811441 ... .S1.R1.TR6
Do you care to compare it with the Dylos?

Thanks

 

[LarrySabo]

Yes, I still have that one. I thought Jared already made a comparison with his Dylos? I'll look for that post. If I can't find it, I'll do a test myself.

Edit: Here's Jared's post of his findings with the cheapo meter vs his Dylos 1100 Pro. IIRC, my Dylos measures 30-50 thousand particles per cubic foot in my lab, which is consistent with what the standard says is normal (35 thousand). It's hard to believe Jared's normal (unfitered) environment should read 1200 thousand particles per cubic foot vs my 30-50 thousand, especially given that my lab is in my unfinished basement! Without a calibrated particle counter for comparison, this exercise is turning into a mug's game. I'll do more testing.

 

[pclab]

Thanks Larry!

 

[Jared]

Yes, I still have that one. I thought Jared already made a comparison with his Dylos? I'll look for that post. If I can't find it, I'll do a test myself.

Edit: Here's Jared's post of his findings with the cheapo meter vs his Dylos 1100 Pro. IIRC, my Dylos measures 30-50 thousand particles per cubic foot in my lab, which is consistent with what the standard says is normal (35 thousand). It's hard to believe Jared's normal (unfitered) environment should read 1200 thousand particles per cubic foot vs my 30-50 thousand, especially given that my lab is in my unfinished basement! Without a calibrated particle counter for comparison, this exercise is turning into a mug's game. I'll do more testing.

In unfiltered air in my office it's reading 1200 particles, not 1200 thousand.

 

[LarrySabo]

The Dylos read-out is in thousands of particles per cubic foot, so how can you tell it's 1200 particles? I assumed you meant it read 1200, which would be 1200 thousands, no?