Abstract: To meter catalysts into a reactor, the catalyst is firstly suspended in a hydrocarbon in a reservoir and the suspension obtained is kept in motion by stirring and then fed via a three-way metering valve and an ejector into the actual reactor, wherein the suspension containing the catalyst is firstly discharged from the reservoir by means of a pump and continuously circulated by returning the suspension via the three-way metering valve within a closed piping system to the reservoir, subsequently setting a pressure in the reservoir which is from 0.1 to 30 bar higher than the pressure in the reactor and then continuously introducing the suspension into the reactor via a flow meter which controls the three-way metering valve and via a downstream ejector by pulse operation of the now open three-way metering valve.

Abstract: In connection with a mechanical blood pressure measuring device having a pressure measuring cell with a pressure indicator for measuring the course of pressure and an operating unit with a pressure generating device and a presure regulating device, the pressure measuring cell and the operating unit are releasably connected with each other. The pressure measuring cell and the operating unit can be connected with each other in two positions which are turned by 180° in respect to each other.