The TVOC is a fixed PID detector for the fast and accurate detection of volatile organic compounds (VOCs) with a multiple-detection range. TVOC measures time-weighted averages (TWAs) and short-term exposure limits (STELs) for 450 selectable gases. It is unaffected by humidity and contamination.

TVOC detects gas by diffusion; it has no pump that needs either servicing or potentially replacing over time. This means that servicing costs are low. The detector can accurately measure over three different ranges and is simple to use, requiring minimal user training.