The German KRACHT functional turbine rotor is mounted in a stainless steel housing on both rotor shafts. The bearing material is PTFE or tungsten carbide. This means that even erosive or slightly abrasive fluids can be measured. The medium passes through the turbine blades, causing the rotor wheel to spin at a rate proportional to the speed of the fluid. As each rotor blade passes through the magnetic field generated by the transducer, a voltage output is produced. The preamplifier converts the sine wave into a square wave signal. Explosion Proof Design (ATEX) • All turbine flowmeters have an explosion proof design in accordance with ATEX regulations. • Explosion-proof design includes turbine flowmeter (intrinsically safe electrical) device) and switching amplifier K 130 (related electrical device). The type protection "intrinsic security" applies to this structure. • Turbine flowmeters are installed in explosive hazardous environments. • The installation of the amplifier K 130 is carried out in a secure area. • Turbine flowmeter and switching amplifier are electrically connected to each other. The switching amplifier