Like the TLV Panther, the TLV Falcon incorporates a photo-ionization detector (PID) for the detection of Volatile Organic Compounds (VOC’s). However, because the TLV Falcon is a single channel unit, it is much more compact. The TLV Falcon comes standard with a digital display, built-in sample pump, and audible and visual alarms. It operates on 4 ‘C’ size alkaline or nicad cadmium batteries, or the AC adapter/charger. The unit comes standard with 3 ranges which are selectable via a switch on the front panel. While the unit comes standard calibrated to isobutylene, calibration to other gases is also available.