Particle Counters
- Thread starter LarrySabo
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Amarbir[CDR-Labs]
Member
pclab":1krpe1t2 said:
Well,
And Why Not Jared Should Have ZERO Issue With This ,Plus He Can Enjoy a Colour Display :mrgreen:
LarrySabo
Member
I just ran another test and varied the direction in which the counter was pointing to see how it affects results. The counter sensor seems to have a very wide field of view. If I have the counter pointing directly into the air flow, its readings vary a bit, as described earlier. If I raise it 30 degrees or so, its readings become very stable and lower. With the sneeze-guard raised and the counter pointing straight up, it senses particles outside the chamber. If I lower the sneeze-guard, it stops sensing the particles outside the chamber. Other than that, and its unknown accuracy and units of measure, it seems quite responsive. Here's a video that illustrates what I just described.
https://www.dropbox.com/s/rhca6kk9jgayu ... t.wmv?dl=0
https://www.dropbox.com/s/rhca6kk9jgayu ... t.wmv?dl=0
Amarbir[CDR-Labs]
Member
Larry Ji,
Can You Post Some Pictures Of Its Backside ,Video Was Good i am sure it does a decent job IMHO
Can You Post Some Pictures Of Its Backside ,Video Was Good i am sure it does a decent job IMHO
Well, I received one of these today for testing and I'm not exactly impressed. It's nowhere near as sensitive as my Dylos DC1100 Pro is.
For example:
Open (not clean room) air of my office,
Dylos is reading somewhere in the neighborhood of 1200 0.5 micron particles and around 70-80 2.5 micron particles,
The cheap one is reading only about 15-20 2.5 micron particles sitting right next to it.
On a start-up of my clean hood from not running
The cheap one drops to 0 count on all particle sizes in about 5 or 6 seconds and stays there.
The Dylos continues logging particle hits for about another two full minutes before finally hitting zero particles and continued to log a hit of an occasional 0.5 size particle over the next several minutes before finally remaining at 0 on all particle counts. Even at the 2.5 micron size it was logging particle hits long after the cheap ebay one was at 0 particle count.
I don't think I'd trust it to be anywhere close to an accurate measurement. It's definitely a "home particle counter" as the listing implies.
For example:
Open (not clean room) air of my office,
Dylos is reading somewhere in the neighborhood of 1200 0.5 micron particles and around 70-80 2.5 micron particles,
The cheap one is reading only about 15-20 2.5 micron particles sitting right next to it.
On a start-up of my clean hood from not running
The cheap one drops to 0 count on all particle sizes in about 5 or 6 seconds and stays there.
The Dylos continues logging particle hits for about another two full minutes before finally hitting zero particles and continued to log a hit of an occasional 0.5 size particle over the next several minutes before finally remaining at 0 on all particle counts. Even at the 2.5 micron size it was logging particle hits long after the cheap ebay one was at 0 particle count.
I don't think I'd trust it to be anywhere close to an accurate measurement. It's definitely a "home particle counter" as the listing implies.