Abstract: A method for testing a measuring device is used to determine a permittivity of a frying fat which permittivity is inter alia dependent on the temperature, while taking into consideration the temperature. The method is characterized in that the permittivity is measured at least two different temperatures and the temperature dependence is determined and is used to make a statement on the ability to function of the measuring device.

Abstract: In a gas sensor with at least two electrodes and with a sensor body which is connected thereto and is composed of a gas-sensitive material, in addition to pores which may already be present, second cavities are provided in the sensor body. The second cavities may be suitable on account of their size to facilitate and accelerate the distribution of gas molecules in the sensor body and to thus improve the time response of the gas sensor.

Abstract: A measuring arrangement for determining flow speeds in a flow channel includes a probe tube which is introduced via a first opening into the flow channel. The probe tube is exposed to a flow with a flow speed, the side of the probe tube facing the flow comprising a plurality of openings which are interconnected inside the probe tube such that a total pressure dependent on the flow speed prevails inside the probe tube. The measuring arrangement also comprises a static pressure opening in the flow channel, and a differential pressure sensor that determines the differential pressure between the total pressure inside the probe and the static pressure in the flow channel. The probe tube may be partially surrounded by a shield which is mobile and/or length-adjustable and that, according to its position and/or length along the probe tube, may close one, several or none of the openings.

Abstract: The invention relates to a joint which can be subjected to the temperature influences of an external medium (20) and joins an especially ceramic component (2) to an especially metallic component (1). Said joint consists of a first adhesive joint (14) between the metallic component and the ceramic component, and a second adhesive joint (22), the adhesive (16) of the second joint having a higher elasticity than that (10) of the first adhesive joint (14), and the second joint being arranged in such a way that it prevents direct contact between the first adhesive joint (14) and an external medium (20). The inventive joint can preferably be used, for example, preferably in a sensor module of a measuring appliance which can be introduced into a medium to be analyzed.

Abstract: A method for testing a measuring device is used to determine a permittivity of a frying fat which permittivity is inter alia dependent on the temperature, while taking into consideration the temperature. The method is characterized in that the permittivity is measured at least two different temperatures and the temperature dependence is determined and is used to make a statement on the ability to function of the measuring device.

Abstract: A measuring device is used to measure the state of oils of fats. Said measuring device comprises a housing, a hollow connecting element which is secured therein and a carrier which is applied to the opposite end of the connecting element, said carrier being used to receive a sensor which can be used to measure an electric property of the product which is to be measured. The sensor is in contact with an evaluation unit by means of at least one electric line which is arranged on a non-conductive carrier, which is arranged in the region of the housing and/or the end of the connecting element which is oriented towards the housing. The measuring device comprises a plurality of carriers which are arranged in a row and which are thermally insulated from each other.

Abstract: A measuring arrangement for determining flow speeds in a flow channel includes a probe tube which is introduced via a first opening into the flow channel. The probe tube is exposed to a flow with a flow speed, the side of the probe tube facing the flow comprising a plurality of openings which are interconnected inside the probe tube such that a total pressure dependent on the flow speed prevails inside the probe tube. The measuring arrangement also comprises a static pressure opening in the flow channel, and a differential pressure sensor that determines the differential pressure between the total pressure inside the probe and the static pressure in the flow channel. The probe tube may be partially surrounded by a shield which is mobile and/or length-adjustable and that, according to its position and/or length along the probe tube, may close one, several or none of the openings.

Abstract: A system for the early detection of damage to and/or soiling of a capacitive sensor includes determining a degree by which the sensor is damaged and/or soiled by measuring a physical property of an electrode, e.g. the resistance of the electrode, or optically by means of the coefficient of reflection of the electrode surface of at least one electrode of the capacitive sensor. A capacitive sensor, according to the system described herein, may include components for provide the diagnostic function.

Abstract: A measuring device is used to measure the state of a liquid product which is to be measured, in particular oil or fat. Said measuring device comprises a housing, a hollow connecting element which is secured therein and a carrier which is applied to the opposite end of the connecting element, said carrier being used to receive a sensor which can be used to measure the electric property of a product which is to be measured. The sensor is in contact with the measuring unit by means of at least one electric line, which is arranged in the region of the housing and/or with the end of the connecting element oriented towards the housing. The measuring device comprises means which can be used to minimize the falsifying effect of the water content in the product, which is to be measured, on the measuring result.

Abstract: In a gas sensor with at least two electrodes and with a sensor body which is connected thereto and is composed of a gas-sensitive material, in addition to pores which may already be present, second cavities are provided in the sensor body The second cavities may be suitable on account of their size to facilitate and accelerate the distribution of gas molecules in the sensor body and to thus improve the time response of the gas sensor.

Abstract: The aim of the invention is to provide a simple and reliable method of measuring the quality of a fluid (2), in particular an oil or fat. This is achieved by a dielectric measurement in conjunction with a temperature measurement, which are carried out in situ by means of a measuring assembly and a sensor assembly (1) used with the latter, whereby the sensor assembly is submerged in the fluid. This permits information concerning the condition of the fluid, in particular concerning the age of the frying oil or fat, to be obtained in a rapid, low-cost manner.

Abstract: A measuring device is used to measure the state of oils or fats. Said measuring device comprises a housing, a hollow connecting element which is secured therein and a carrier which is applied to the opposite end of the connecting element, said carrier being used to receive a sensor which can be used to measure the electric property of the product which is to be measured, in addition to a sensor which can be used to measure the temperature of the product which is to be measured. The two sensors are in contact with the evaluation system by means of at least one electric line, which is arranged in the region of the housing and/or on the end of the connecting element oriented towards the housing. The temperature sensor is arranged at a pronounced distance from the connecting element and the sensor in order to measure the electric property of the product which is to be measured.

Abstract: A measuring device is used to measure the state of a liquid product which is to be measured, in particular oil or fat. Said measuring device comprises a housing, a hollow connecting element which is secured therein and a carrier which is applied to the opposite end of the connecting element (10), said carrier being used to receive a sensor which can be used to measure the electric property of a product which is to be measured. The sensor is in contact with the measuring unit by means of at least one electric line, which is arranged in the region of the housing and/or with the end of the connecting element oriented towards the housing. The measuring device comprises means which can be used to minimize the falsifying effect of the water content in the product, which is to be measured, on the measuring result.

Abstract: A measuring device is used to measure the state of oils of fats. Said measuring device comprises a housing, a hollow connecting element which is secured therein and a carrier which is applied to the opposite end of the connecting element, said carrier being used to receive a sensor which can be used to measure an electric property of the product which is to be measured. The sensor is in contact with an evaluation unit by means of at least one electric line which is arranged on a non-conductive carrier, which is arranged in the region of the housing and/or the end of the connecting element which is oriented towards the housing. The measuring device comprises a plurality of carriers which are arranged in a row and which are thermally insulated from each other.

Abstract: The invention relates to a joint which can be subjected to the temperature influences of an external medium (20) and joins an especially ceramic component (2) to an especially metallic component (1). Said joint consists of a first adhesive joint (14) between the metallic component and the ceramic component, and a second adhesive joint (22), the adhesive (16) of the second joint having a higher elasticity than that (10) of the first adhesive joint (14), and the second joint being arranged in such a way that it prevents direct contact between the first adhesive joint (14) and an external medium (20). The inventive joint can preferably be used, for example, preferably in a sensor module of a measuring appliance which can be introduced into a medium to be analysed.