FAQ Airborne Particles

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What is the limit on how much tubing can bend (max. radii) vs. the inner diameter of the tubing?
Can you please tell the sampling volume for ISO class?
At what temperature, relative humidity and absolute humidity are cleanrooms certified?
What is the frequency for performing a zero count on the LASAIR II 550L? How do you perform the zero count? What is the acceptance criterion for the zero count?
What is the certification frequency required for HVAC Systems?
Specifically, what is the number of leak tests per year, velocity, cleanliness, and other items required for HVAC Systems?
Our Zero Count measurement is done weekly, with results at the ninth and tenth measurement being "0" for the 5.0,1.0, and 0.5 um particle sizes. Does the Lasair have a similar procedure?
Can I sample pressurized gases?
What sampling rate should I use?
Where in my facility should I place aerosol particle counters to ensure I am effectively monitoring?
Which particles counters should I use for spot checking versus continuous monitoring?
I need to certify my cleanroom. Which particle counters are best for this?
Per ISO, statistical analysis is required if the number of locations to be measured are (as the area calculated) >2 and < 9. If, based on my area, the number of locations to be sampled are 7, can I perform counting at extra locations (up to 10) and avoid the statistical analysis?
What should the course of action be when the particle count exceeds 100 (0.5 micron) in class 100 ?
In MLPC-101 HP specification the maximum particle sizing threshold is 5 micron. What is the reference to use these sizes in compressed air or nitrogen gas?

Without Measurement There Is No Control

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