Endress+hauser Conducta Gmbh+co. Kg

Endress+hauser Conducta Gesellschaft Fur Mess- Und Regeltechnik Mbh+co. Kg

Hendrik Zeun

Ronny Michael

Thomas Nagel

Stefan Paul

Jörg Uhle

Andreas Eberheim

Andre Thieme

Sven-Matthias Scheibe

Stefan Pilz

A measuring method for measuring dissolved oxygen includes performing a first measurement sequence, including: emitting a first stimulation signal onto a sensor for a first period; detecting a first detection signal; determining a phase shift between the first stimulation signal and the first detection signal; and calculating a first measured value based on the determined phase shift. Performing a second measurement sequence, including a second stimulation signal onto the sensor for a second period, wherein the second stimulation signal is different than the first stimulation signal; detecting a second detection signal; determining a decay time of the second detection signal; calculating a second measured value based on the decay time. The method further includes comparing the first measured value to the second measured value and correcting the first measured value when a difference between the first measured value and the second measured value is greater than a first limit value.

Method for measuring oxygen and apparatus for measuring oxygen

A method for transmitting energy to a sensor comprises transferring energy from a primary side having a primary coil to a secondary side having a secondary coil, wherein the sensor is arranged on the secondary side, wherein transfer of energy occurs via the two coils, wherein the two coils are designed to transmit data bidirectionally; acquiring a measured variable using the sensor; transmitting the measured variable from the secondary side to the primary side; requesting an energy pulse from the primary side when an event occurs that requires more energy; interrupting transmission of the measured variable; transmitting an energy pulse from the primary side to the secondary side; and returning to the normal mode upon acquisition of the measured variable; and transmitting to the primary side the measured variable. Also disclosed is a corresponding sensor arrangement for carrying out the method.

Method and sensor arrangement for transmitting energy to a sensor

The invention discloses an intrinsically safe field device for process automation technology, comprising: at least one sensor element for detecting at least one measurand; a secondary coil for transmitting and receiving data&#x2014;in particular, values derived from the measurand&#x2014;from a primary coil, and for receiving power from the primary coil, wherein the secondary coil comprises first and second connections; a second coupling body that is designed to be complementary to a first coupling body, wherein the second coupling body comprises the secondary coil; and a circuit assembly that is arranged downstream of the secondary coil. Within the circuit assembly, Zener diodes are connected upstream of rectifier diodes.

Intrinsically safe sensor for process automation technology

A measuring system for determining the specific electrical conductivity of a medium in a vessel, comprising an inductive conductivity sensor with at least one transmitter coil that emits an input signal into the medium and a receiver coil connected to the transmitter coil via the medium that delivers the output signal, a temperature sensor for measuring the temperature of the medium, and a data processing unit that determines the conductivity of the medium using the input signal, the output signal, and the temperature provided. The system is characterized by the fact that the conductivity sensor and the temperature sensor are designed as non-invasive sensors.

Measuring system for determining specific electrical conductivity

An optical sensor, comprising a sensor head, which contains a sensitive element and which is adjoined by a housing, which contains sensor electronics, wherein the sensitive element is irradiated with light from an optical transmitter and a light characteristic radiated back by the sensitive element is detected by an optical receiver and evaluated by the sensor electronics. The sensor head and the housing are embodied to be separable, wherein different sensor heads having different sensitive elements are connectable to the housing containing the sensor electronics and the sensor electronics evaluates the light characteristics generated by the different sensitive elements.

Optical sensor, especially for determining substance concentrations in aqueous solutions by means of a fluorescence measurement

A measuring system for determining a value of a physical or chemical, measured variable of a medium, includes: a base unit; at least one relay unit connected with the base unit and a sensor unit connected with the relay unit. The sensor unit includes a circuit having at least one microcontroller, at least a first memory region, and a second memory region. The upload software is embodied, in interaction with the microcontroller, to perform an updating of the basic software with at least one software module provided from the base unit. The relay unit includes a circuit having at least one microcontroller, and at least a first memory region, in which a basic software of the relay unit is stored. The circuit of the relay unit further includes a second memory region, in which an upload software of the relay unit is stored.

Measuring system for determining a value of a physical or chemical, measured variable of a medium and method for operation of the measuring system

An inductively working sensor for determining the conductivity of a liquid medium. The sensor includes: at least one transmitting circuit, which is designed to deliver an input signal for a transmitting coil, in order to produce in the transmitting coil an alternating electromagnetic field, which causes a ring-shaped electrical current in the liquid medium; at least one receiving circuit, which is designed to evaluate a received signal produced by the ring-shaped electrical current in a receiving coil; a first coil; a second coil, which is arranged at a distance from the first coil; a switching means for switching between a first switch state and a second switch state, wherein, in the first switch state, the first coil, serving as transmitting coil, is coupled with one of the transmitting circuits; and the second coil, serving as receiving coil, is coupled with one of the receiving circuits, and wherein, in the second switch state, the second coil, serving as transmitting coil, is coupled with one of the transmitting circuits, and the first coil, serving as receiving coil, is coupled with one of the receiving circuits.

Conductivity sensor with switching between transmitting and receiving coil

An ion sensitive sensor having an EIS structure, including: a semiconductor substrate, on which a layer of a substrate oxides is produced; an adapting or matching layer, which is prepared on the substrate oxide; a chemically stable, intermediate insulator, which is deposited on the adapting or matching layer; and an ion sensitive, sensor layer, which is applied on the intermediate insulator. The adapting or matching layer differs from the intermediate insulator and the substrate oxide in its chemical composition and/or structure. The adapting or matching layer and the ion sensitive, sensor layer each have an electrical conductivity greater than that of the intermediate insulator. There is an electrically conductive connection between the adapting or matching layer and the ion sensitive, sensor layer.

Ion sensitive sensor with multilayer construction in the sensor region

A method for operating an inductive conductivity-measuring cell having a primary circuit with a sending coil, a secondary circuit with a receiver coil, and a short-circuit path, which passes through the sending coil and the receiver coil. The sending coil couples via the short-circuit path inductively with the receiver coil, wherein, in the case of closed short-circuit path, a first electrical signal present in the primary circuit is measured, and wherein the first signal is compared with, and/or weighed against, values, which are furnished or stored.

Growing community of inventors

Chemnitz, Germany

Hendrik Zeun