Shut-off valves, valve manifolds or monoflanges, can be used to securely separate pressure measuring instruments from the process during commissioning, maintenance or calibration. Protective devices, such as siphons, overpressure protectors and snubbers, increase the service life and extend the application spectrum of pressure measuring instruments. Alongside the extensive selection of instrumentation valves and accessories, WIKA also offers qualified assembly of different individual components into a complete measuring unit.