Abstract: A mass flow meter for flowing media, which operates according to the Coriolis principle, has a straight Coriolis measuring tube, an oscillation generator acting on the Coriolis measuring tube, and at least one sensor detecting Coriolis forces and/or Coriolis oscillations based on Coriolis forces. The problem which results from the fact the mass flow meter has only one straight Coriolis measuring tube is largely eliminated by designing the Coriolis measuring tube as a flow channel of a thick-walled body, namely a thick-walled tube, the thick-walled tube having recesses accessible from the outside and reaching very close to the Coriolis measuring tube. A vibration transducer as the oscillation generator acts upon the residual material of the thick-walled tube remaining in the area of the recesses, and the Coriolis forces or Coriolis oscillations appearing in the area of the residual material of the thick-walled tube are detected by each sensor.

Abstract: A mass flow meter for flowing media, which operates according to the Coriolis principle, has a straight Coriolis measuring tube, an oscillation generator acting on the Coriolis measuring tube, and at least one sensor detecting Coriolis forces and/or Coriolis oscillations based on Coriolis forces. The problem which results from the fact the mass flow meter has only one straight Coriolis measuring tube is largely eliminated by designing the Coriolis measuring tube as a flow channel of a thick-walled body, namely a thick-walled tube, the thick-walled tube having recesses accessible from the outside and reaching very close to the Coriolis measuring tube. The oscillation generator acts upon the residual material of the thick-walled tube remaining in the area of the recesses, and the Coriolis forces or Coriolis oscillations appearing in the area of the residual material of the thick-walled tube are detected by each sensor.

Abstract: A process for measuring the level of a liquid in a tank according to the radar principle, using a voltage-controlled oscillator determining the radar frequency, and a voltage source controlling the voltage-controlled oscillator, in the case of which the radar frequencies are modulated according to the FMCW process by a corresponding control of the voltage source. The frequency of the voltage-controlled oscillator is measured at least regularly during the frequency sweep, and a non-linear frequency characteristic is corrected during the frequency sweep through a corresponding controlling of the voltage source.

Abstract: A meter for flowing media, which preferably operates according to the Coriolis principle, with at least one conduit conducting the flowing medium, with at least one oscillation generator acting on the conduit, and with at least one transducer detecting preferably Coriolis forces and/or Coriolis oscillations based on Coriolis effects. With the transducer described, an electric current flows through at least a section of the conduit and/or the flowing medium.

Abstract: In a volume flow meter with a measuring line, a first measuring head and a second measuring head, the flow volume can be measured more simply and more reliably using evaluation technology by having the measuring line made of a material that transmits an acoustic signal given off by one of the measuring heads at a slower sound velocity than the fluid.

Abstract: A process for measuring the level of a liquid in a tank according to the radar principle, in which microwave energy is transmitted in the direction of the liquid level and the bottom of the tank from an antenna located above the liquid level, a measuring signal reflected from the liquid level is received by an antenna, and the liquid level may be determined from the transit time of the measuring signal, other signals than the measuring signals, i.e.

Abstract: A mass flow meter for flowing media which works on the Coriolis Principle includes a straight measuring pipe carrying the flow medium, an oscillator acting on the measuring pipe and two transducers detecting Coriolis forces and/or Coriolis oscillations based on Coriolis forces. The meter also has a carrier pipe holding the measuring pipe, the oscillator and the transducers and two temperature sensors that detect the temperature of the measuring pipe and correct the measured value depending on the temperature of the measuring pipe. The measuring pipe and the carrier pipe are connected to one another in a way that excludes relative axial movements, and the axial distance between the connecting points of the measuring pipe carrier pipe represents the oscillation length of the measuring pipe.

Abstract: An electrical device for measuring the liquid level in industrial tanks and the like with a microwave transmitter and receiver and a waveguide provided with an aperture and an antenna. The signal reflected from the liquid surface and the transmitted signal are fed to a frequency conversion stage (8), whose low-frequency output signal is sent via an A/D converter (12) to a microprocessor calculating the fill level. To reduce the effect of interference frequencies produced by reflection of microwaves in the optical aperture, etc., a band-pass filter (9,10) with a lower limiting frequency selected to attenuate the low-frequency interference frequencies is placed between the frequency conversion stage (8) and the A/D converter (12). The lower limiting frequency can either be controlled with microprocessor (13) or the band-pass filter (9, 10) has adjustable limiting frequencies.

Abstract: A distance measuring device for measuring the fill level in industrial tanks, which includes electronic transmitting- and receiving elements for short wave electromagnetic waves, such as microwaves, and a cylindrical waveguide which extends through a separating wall and inside of which is a waveguide window separating the two spaces and made of a material, such as quartz glass, which is transmissive with respect to electromagnetic waves. The waveguide and the waveguide window (3) have conically-shaped sections (5) to provide axial support. To protect the waveguide window against destruction due to thermal expansions and pressure fluctuations, the conical section (5) of the waveguide window (3) is in a correspondingly formed conical socket (8). The socket is mounted with play in a cylindrical bore (9) of the waveguide window (3) and is supported by a shoulder (10) of the waveguide in the axial direction.

Abstract: An electromagnetic flow meter consists of a metering tube made of an electrically non-conductive material and having a thick outer wall. The tube has at least two measuring electrodes and at least two magnetic poles, each of which is disposed in a blind bore of the tube. The poles are linked to one another by a yoke fitted with a magnetic coil. To achieve greater measuring precision both the yoke and the magnetic coils are mounted in a recess inside the outer surface of the metering tube. The recesses are in the form of through holes and grooves. When fully assembled all magnet components are disposed inside the outer surface of the metering tube.

Abstract: In liquid measuring apparatus, a cable supporting a sensing plate is attached to a drum that is connected via a magnetic clutch with the drive shaft of a servomotor. The servomotor is supported in a pivot mount which is flexibly rotatively connected to the apparatus housing. In response to liquid level changes, a contactless sensor generates a signal which is compared with a balance of moments reference signal in a comparator to develop a deflection signal which, after conversion into frequency pulses in fast servocontrol circuitry, activate the servomotor in one direction or the other as determined by a polarity switch activated by a directional decoder. Inaccuracies due to parts vibrations are compensated for. Also, measurement disturbances caused by waves at the surface of the liquid are avoided with the aid of slow servocontrol circuitry which, after a delay, activates the servomotor with an adjustable frequency supplied by an oscillator.

Abstract: When measuring the velocity of fluid flow by measuring the voltage produced by magnetic induction applied to the fluid, measurement is affected by the electrochemical potential developed at the electrodes. This may be compensated by storing the total signal produced with a first value of the induction and subtracting this stored signal from the total signal produced at a second value of the induction so that the electrochemical potential cancels out.