Due to current weather conditions, deliveries may be delayed.
Charcoal filter attaches to the inlet probe of a Photo Ionization Detector (PID) to remove background Volatile Organic Compounds (VOCs), allowing the instrument to reference a zero, or near zero, air sample. Used during the "Fresh Air Cal" procedure. The charcoal filter canister has a check box so that the user can mark off a box each time the filter has been used. The charcoal filter should be replaced after 4 calibrations.