8026 Particle Generator Salt Shenanigans...

The over-engineered ultrasonic dehumidifier that TSI calls the **8026 Particle Generator** was originally designed for the PortaCount 8020A, so you didn't have to have open flame candle, if you were, I don't know, paranoid about the flammability of reagent isopropanol (or some other substance in the room) and didn't trust... #8020a #8026 #portacount #tsi #CPCSupport

https://fedia.io/m/CPCSupport/t/563273

Q+A / How to Post

The previous post's instructions you may have seen here is **not recommended anymore!** Instead, follow the steps below:... #cpcsupport #8020agang #niosh #8020a #8020m #8020 #tsi #m41pats #openaeros #fittest #fittesting #portacount #CPCSupport

https://fedia.io/m/CPCSupport/t/516540

Repost of @masknerd 's tweet about his upcoming talk at the European Aerosol Conference about the OpenCPC: The world's first open source condensation particle counter.

Commercial particle counters are prohibitively expensive unless you can eBay an old working one. The Portacount 8020A I use for respirator fit testing is a discontinued model from decades ago.

Would love to move to unit that we can maintain and keep calibrated if the OpenCPC becomes a reality.

#EAC2023 #PortaCount #FitTest

Drager 1920 M/L: Sanity tested a sample from a new Ebay box before stocking up a family member for an overseas trip. The printing on the M/L looks more washed out compared to the S - no particular concerns about the vendor but I may as well make sure.

I'd already passed in the S size, but it looks like the M/L also fits. The M/L scores even higher but feels looser around the nose/chin. Will have to stress test later.

#FitTest #PortaCount #Respirator #Drager #FFP2 #8020AGang

Probed my first couple of old respirators today just to practise doing fit test exercises.

This battered 3M Vflex fit when I stayed still, but failed with head movement.

The Moldex's nice seal tested well even with head movement, but also fell below 100 FF when I started speaking.

Maybe a true result, or could be due to the old masks, low ambient particle counts or user issue. Will try other models before coming back to these.

#FitTest #PortaCount #Respirator #8020AGang #vflexgang #moldex

Picked up a second hand PortaCount 8020A condensation particle counter, to quantitatively measure how well my different respirators fit (or not).

It's the same type of equipment used to do proper fit tests, which use the ratio of the particles measured outside and inside the mask to work out a fit factor.

Just starting on this with the support of an active circle of hobbyist doing this on the birdsite, but I plan to post future progress here also.

#FitTest #PortaCount #Respirator #8020AGang