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Windscreen for 1/2-inch microphone for SoundPro and Sound Examiner sound level meters.

PID (ppm) sensor.

Nylon Dorr-Oliver Cyclone. Accessory for certain DustTrak products.

Zero filter assembly (sold separately) for use with AeroTrak®+ 0.1 CFM Remote Particle Counters.

ACI Spring Clamps, set of 6 O-Rings

O-rings for External Filter Holder Insert Retaining Ring, Qty 10

Gas sensor calibration cap 

Carbon Dioxide Sensor

Nitric Oxide Sensor

VOC Sensor, ppb (low)