Differential atmospheric tritium sampler

This paper describes an atmospheric tritium sampler. It comprises: a means for providing and containing a carrier gas, the carrier gas comprising a mixture of H2 and a diluting gas, the H2 concentration in the carrier gas comprising less than 4 per cent of the mixture; manifold means for drawing in an air sample through an air intake port and the carrier gas through a carrier gas intake port and for exhausting a mixture thereof through an output port, the air sample containing moisture and HT therein; regulating means for metering the flow of carrier gas to the manifold means; a first moisture trap, connected to receive the exhaust from the manifold means, for adsorbing the moisture from the air sample and exhausting the balance of the air sample/carrier gas mixture; combustion chamber means, connected to receive the exhaust from the first moisture trap; a second moisture trap connected to an separate from the combustion chamber means; discharge means for exhausting the balance of the air sample/carrier gas mixture from the second moisture trap into the atmosphere