Thread by @ARISense_AQ

#AAA2022 Performance of Plantower PMS Sensors and the Alphasense Optical Particle Counter for Measuring PM10 Concentration in the Laboratory and Field. KERRY KELLY, Kamaljeet Kaur, Ross Whitaker, University of Utah. 1/

The "Great" Salt Lake is no longer 'so great' -

We have a large 750 mile stretch of dry lake bed. Prevailing wind pushes the air into population of over 1M people.

5 dust events in a single month this past Spring. That's unusual. Used to be maybe ~ 1 dust event/mo.

Running VOAG 2 micron particles PA-IIs are completely BLIND. Blind people. Doesn't detect them. Any of them.

Same story for the 10 micron particles.

Alternatively - good sensitivity from the OPC-N3 to 2 micron and 10 micron DOS particles in the lab.

Field stuff: Comparing the PMS5003 and OPC-N3 PM10 results against BAM PM10. PMS is trash. OPC-N3 is good. No surprises here folks - physics matters.

PM2.5/PM10 ratio correction factors... try and reconcile PMS5003 response to dust..

But you still need to make a legit measurement of PM2.5 and PM10 to get the ratio, right? (I am confused - Eben speaking here..)