Gastec’s GV-100 and GV-110 gas sampling hand pumps are used with Gastec standard gas sampling tubes for on the spot sampling in over 600 different applications. Features like a smaller diameter pump shaft to reduce the effort required to pull the handle, a built in thermal ring for ambient temperature readings, and a tip breaker with a diamond edge cutting blade increase both usability and safety. The housing is manufactured from a plastic and synthetic rubber compound enclosed in a soft elastomer for a comfortable grip and to eliminate the possibilty of any sparks when dropped in a hazardous environment. When sampling the pump shaft can lock into two clearly defined positions, allowing accurate and consistent sample volumes of 50 or 100 ml, while a flow finish indicator in the handle informs the user when the sample is finished.