The Portable Gas Diluter is used to calibrate the FROG or TOCAM™. The portable gas diluter enables the user to mix various known concentrations from a single calibration gas cylinder. An internal compressor supplies the dilution gas in the Portable Gas Diluter, or it can be connected to a supply tank of dilution gas. The Inline Diluter is used for diluting high concentration samples for the FROG™ or TOCAM™. An internal scrubber provides dilution air for the Inline Diluter.