Original STAUFF test couplings for temporary or permanent connection of analogue measuring equipment and digital sensors. Pressure monitoring in systems with liquid and gaseous media. Venting and extraction of fluid samples for analysing the level of contamination. Connection of hydraulic testers possible even during active operation under full operating pressure and without tools: Integrated ball valves or poppet valves open only after connection. Matching test hoses and test hose fittings in DN2 and DN4. Wide range of accessories.