Analogue STAUFF hydraulic testers with brass and aluminium housing for mechanical and therefore network-independent flow rate measuring of hydraulic media flow in mobile and industrial hydraulics. For load testing of the hydraulic system, the SDMKR is equipped with a load valve for targeted control of the working pressure. This product also accepts reverse flow (without flow metering). The SMD on the other hand can and must not be subjected to reverse flow. Designed for installation in straight tubes.