Detects organic vapors using both PID and FID technologies. The PID is operating with a 10.6eV lamp that will read any VOCs with an ionization potential (i.e.) of less than 10.6. The FID uses 99.9% hydrogen to fuel the internal flame that is included in the rental rate (special shipping required). The ranges for this instrument are 0.5-2000ppm (PID), 1-50,000ppm (FID). The PID is calibrated to Isobutylene and the FID is calibrated to Methane. (Intrinsically safe for Class 1, Division 2, Groups A, B, C, D)