Patent ID: 7614315

Claim:
A probe for measuring the concentration of mercury in a flue gas in a stack, which probe comprises: a) a housing having a first end adapted to be situated in a stack and a second end adapted to be external thereto, b) at least one sorbent trap containing a media capable of capturing mercury when a flue gas stream is passed there-through, which the at least one sorbent trap is held in a cartridge forming a frame having a front end and a back end and side walls and whose top and bottom are open and which cartridge is located within the first end of said housing so that said at least one sorbent trap is in fluid communication with the flue gas stream within the stack and a receiving tube within the housing; and c) the receiving tube located within said housing having a first end fluidly connected to the cartridge and the at least one sorbent trap and a second end extending from the second end of said housing.