Drager Accuro Pump- 640000 - 1/CSFast measurement with one hand. The Drger Tube pump accuro allows you to use the established Drger Tubes to take measurements under extreme conditions. The easy to use Drger Tubes have already been calibrated and form a perfect unit with the Drger Tube pump. The Drger Tube pump accuro draws in 100 ml per stroke. When measuring, the pump body (bellows) is pressed together completely. The exhaust valve is closed during the opening phase of the bellows