Abstract: An electrode comprising: a least a first, preferably cylindrical, glass body, in which at least a first chamber is formed; at least a first electrolyte, which is located in the first chamber; at least a first potential-forming element, which is arranged in the chamber, and forms a first potential when contacted by the first electrolyte; at least a first closing element, which is axially fixed in the first chamber for enclosing the first electrolyte and the first potential-forming element and sealedly closes the first chamber; wherein, additionally, the first closing element is conductive, the first potential-forming element conductingly contacts the first closing element, and the electrode furthermore includes at least a first electrical conductor, which electrically contacts the first closing element on the side of the first closing element facing away from the first electrolyte.

Abstract: A method for monitoring the functioning of sensors for the measurement and monitoring of state parameters of liquids or gases, especially in the field of process measurement technology, for example of electrochemical, electrophysical or optical sensors, wherein the sensor is placed into a test state at time intervals and test parameters are registered, or these test parameters are registered at time intervals in the course of the measured value registration. The registered parameters are stored and a backwards-looking, chronological development of the stored test parameters is evaluated for performing the functional monitoring and the development of sensor behavior to be expected in the future is predicted therefrom and information concerning the duration of the remaining, disturbance-free operation of the sensor is obtained.

Abstract: An ion-sensitive sensor arrangement includes: a semiconductor chip having a first surface, which has a media-sensitive region and at least one, first, electrical contact surface; and a support having a second surface, which faces the first surface of the semiconductor chip. An opening is provided, which aligns with the sensitive region, and at least one, second, electrical contact surface, which overlaps, or aligns with, the at least one, first, electrical contact surface. Between the support and the semiconductor chip, a preferably elastic, anisotropic conductor is arranged, which produces a conducting connection between the at least one, first, contact surface and the at least one, second, contact surface, and which has a traversing opening, which aligns with the opening, so that the sensitive region of the semiconductor chip can be contacted through the opening by an analyte. The preferably elastic, anisotropic conductor seals the region outside of the opening against contamination with the analyte.

Abstract: A method for monitoring a reference half cell, which forms with a measuring half cell a potentiometric measuring point for determining and/or monitoring an ion concentration of a medium. The ion concentration of the mediums determined on the basis of at least one measurement signal determined in a measuring circuit, between the measuring half cell and the reference half cell. According to the invention, the measuring point is operated intermittently in an operating mode and in a test mode, wherein, in the operating mode, the ion concentration is measured and wherein, in the test mode, the proper functioning of the reference half cell is checked.

Abstract: A pressure sensor including: A pressure measuring cell having an end face loadable with the medium; a housing having a media opening and a ring-shaped, axial bearing surface, which surrounds the media opening; a clamping apparatus; and a ring-shaped sealing arrangement. The pressure measuring cell is positioned in the housing and the sealing arrangement is positioned between the bearing surface and the end face, and the sealing arrangement, as well as the pressure measuring cell, are axially clamped between the bearing surface and the clamping apparatus. The sealing arrangement includes, a decoupling ring, as well as a first and a second, ring-shaped sealing element. The first sealing element lies against the end face, the second sealing element lies against the bearing surface, and the decoupling ring is axially clamped between the first and the second sealing elements.

Abstract: The sensor arrangement includes: a least two sample chambers; at least two potentiometric FET-sensors, especially ISFET-sensors or ChemFET-sensors, having, in each case, a sensitive surface section, wherein each sensitive surface section lies in flow connection with its one of the sample chambers; and a reference cell having a reference medium for providing a reference potential, wherein the sample chambers are connected with the reference medium via an electrolyte bridge. The reference cell has, preferably, a potentiometric reference-FET-sensor for providing a reference potential, which is registered against the pseudo-reference-potential of a redox electrode. The potentials Udiff1, Udiff2, . . .

Abstract: An apparatus for photometric measurement of the concentration of a chemical substance in a solution, wherein a cuvette is provided containing the solution The cuvette is transmissive at least in predetermined regions for electromagnetic radiation, wherein a transmitting unit is provided, which produces electromagnetic radiation in at least two wavelength regions and which radiates into the cuvette The electromagnetic radiation in a first wavelength region serves for measurement purposes and the electromagnetic radiation in a second wavelength region is used for reference purposes The electromagnetic radiation in the two wavelength regions takes the same path through the cuvette and through the solution At least one detector unit is provided, which is so arranged that it receives the electromagnetic radiation in the at least two wavelength regions following passage through the solution, and wherein a control/evaluation unit is provided, which determines the concentration of at least one chemical substance in t

Abstract: A measuring device for process technology, having a central unit for the connection of different measurement modules, with the central unit containing a central power supply, to which the measurement modules can be connected. In the measurement module a module power supply is provided, which, from the central power supply, generates one or more supply voltage(s) (V_2, V_3) required by the measurement module. For this purpose, the module power supply has a transformer, a rectifier circuit, or also a switching power supply.

Abstract: A device for photometric measurement of the concentration of a chemical substance in a solution, including: a lamp, which emits electromagnetic radiation in a predetermined wavelength range; a first receiving unit in a measuring branch (MB), which receives the radiation transmitted through the solution at a first wavelength; a second receiving unit in a reference branch (RB), which receives the radiation transmitted through the solution at a second wavelength; and a control/evaluation unit, which, depending on the conditions present at the measuring site, uses the intensity values determined either by the measurement branch (MB) or by the reference branch (RB), in order to control the intensity of the radiation emitted by the lamp, such that the resulting, measured values are highly plausible.

Abstract: A receiving container for a sampler or analyzer for accommodating at least one containment for storage of a liquid sample, wherein the receiving container is so embodied that it is positionable in the sampler or analyzer and removable from the sampler, wherein in the lower region of the receiving container at least one transport roller or one transport wheel is provided for transport of the receiving container and wherein in the upper region of the receiving container at least one handle is provided.

Abstract: For simplified supply of potentiometric sensors with a reference electrolyte, a sensor plug head for connecting to a cable connection piece of a potentiometric sensor is provided. The sensor plug head including, besides the usual electric connections, a supply connection for connecting to a reference container of the potentiometric sensor. The supply connection includes, preferably, an electrolyte line and the reference container an opening, with the electrolyte line being connectable to the opening, in order to supply the reference container with electrolyte.