For the upcoming HAM4 work, I place a Met One GT-521S, S/N T20776, particle counter (dust monitor) in the HAM4 clean room. This unit is not connected to CDS, so we won't be able to trend counts or see from the control room. It is located on the +X side of the tube, to -Y side of the door. Workers in the clean room will have to keep an eye on counts.

Before putting it out there I ran a zero count test and flow test on the unit, it passed both. I also double checked that the settings are correct.