Proportioning Pump is used to continuously and simultaneously push fluids, air and gases through the analytical chain. In fact, it is the heart of the automatic analysis system. It is available either for single-speed or for two speed operations. The single speed pump has the capacity synchronous gear had utilizing 10 rpm output shaft at 50 Hz. The two-speed pump has a non-synchronous 45rpm motor. The slow speed in this pump is used for the ordinary working during a run and a much quicker one for filling the system with reagents before a run and for rapid washing to clear out reagents after the run.