Uniphos
Charcol Tubes
Uniphos Charcoal tubes provide a NIOSH approved method of monitoring the work environment for non-polar organic vapors such as benzene, xylene, toluene, etc. They allow for the measurement of Time Weighted Average (TWA) concentration of these compounds. They consist of sealed glass tubes filled with two columns of accurately weighed, high purity coconut shell charcoal. They are available in a number of sizes, based on the sampling protocol chosen.