Precise, accurate mercury vapor measurements are important to ensuring a safe environment during hazardous cleanups, spills, and industrial uses. CIH Equipment’s mercury vapor calibration lab employs the best available practices for calibration of these specialized instruments. Calibration makes use of a mercury vapor generation device that uses permeation tubes as the trace gas source to verify the accuracy of mercury vapor monitors. The generator can deliver precise concentrations (micrograms to milligrams per cubic meter) by varying the chamber temperature and flow rate. The generator is verified by the use of instrumentation with a sensitive detection method, UV absorption (CVAAS) in three ranges, 0-100, 0-1000, and 0-2,000ug/m3. Sensitivity is 0.1ug/m3.