摘要:
A potentiometric probe, comprising: a housing, which has a first chamber, in which a reference half-cell is formed, which is in communication with a medium surrounding the housing via an electrolytic contact location arranged in a wall of the housing. The housing has a second chamber, in which a measuring half cell is formed, wherein the second chamber is closed on one end by a measuring membrane, such that a surface area of the measuring membrane facing away from the second chamber is in contact with the medium surrounding the housing, and wherein the measuring half cell has a lengthwise extension between the measuring membrane and a closure element bounding the measuring half cell on an end lying opposite the measuring membrane. A quotient of a separation of the measuring membrane from the closure element and an outer diameter of the housing amounts to less than 5, especially less than 2.
摘要:
A potentiometric probe comprising: a housing, which has a first chamber, in which a reference half-cell is formed, which is in communication with a medium surrounding the housing via an electrolytic contact location arranged in a wall of the housing. The housing has a second chamber, in which a measuring half cell is formed, wherein the second chamber is closed on one end by a measuring membrane, such that a surface area of the measuring membrane facing away from the second chamber is in contact with the medium surrounding the housing, and wherein the measuring half cell has a lengthwise extension between the measuring membrane and a closure element bounding the measuring half cell on an end lying opposite the measuring membrane. A quotient of a separation of the measuring membrane from the closure element and an outer diameter of the housing amounts to less than 5, especially less than 2.
摘要:
A measuring transducer embodied to produce and output a measurement signal dependent on an activity of a target ion present in a measured medium, wherein the measuring transducer has, in a region provided for contact with the measured medium, at least one membrane conducting the target ion; wherein the measuring transducer has a first potential sensing element and a second potential sensing element, and wherein at least one section of the second potential sensing element is arranged in the interior of the membrane and the first potential sensing element is arranged in an inner electrolyte, which is separated from the measured medium by the membrane and is in contact with the membrane.
摘要:
A conical gear drive comprising an input element that interacts with a truncated conical gear via which an output element can be driven. A number of different output elements or variably selectable output elements should be able to be connected to the truncated conical gear drive.
摘要:
In order, in the case of a moulding composition for the production of sanitary-ware components, comprising a methyl-methacrylate-based syrup and from 50 to 85%, expressed in terms of the moulding composition, of an inorganic filler, to obtain an improvement in the scratch-proofness and the abrasion resistance of the shaped components which are obtained therefrom, it is proposed that the composition furthermore comprise elastomer particles or elastomer particle aggregates having a particle size
摘要:
A biaxially-oriented film with high mechanical strength, which includes 69 to 94.99% by weight of a polyolefin, 5 to 30% by weight of a natural or synthetic resin having a softening point in the range from 70.degree. to 170.degree. C., and 0.01 to 1% by weight of a nucleating agent, based on the total weight of the film. A method for producing this film includes biaxially drawing the film at temperatures below the melting point of the polyolefin.
摘要:
A process for producing a metallizable, sealable, biaxially stretch-oriented multi-ply film includes the steps of: providing melts of a predominantly polypropylene base layer, and first and second polyolefinic facing layers; co-extruding the melts through a flat film die, wherein the first and second polyolefinic facing layers are co-extruded on either side of the base layer; solidifying the co-extruded film by cooling; longitudinally stretching the co-extruded film at a temperature from about 120.degree. to 130.degree. C. in a ratio of from about 5 to 7:1; transversely stretching the co-extruded film at a temperature from about 160.degree. to 170.degree. C. in a ratio of from about 8 to 10:1; and corona-treating one facing layer of the co-extruded film which is metallizable. Each of the melts contains a calcium carbonate neutralizing agent having an absolute particle size of less than about 10 .mu.m, a mean particle size of less than about 0.1 .mu.m, a specific surface area of more than about 40 m.sup.2 /g and a whiteness of more than about 90%, and also a phenolic stabilizer against thermal degradation which has a molecular weight of more than about 1,000 g/mol, and wherein one polyolefinic facing layer contains an anti-blocking agent.
摘要:
A biaxially-oriented film, suitable for use as an electrically insulating film, is disclosed. The film is composed of a highly-pure electrical film raw material based on polyolefins, in particular propylene polymers, and contains carbonate particles as a neutralizing agent. The carbonate particles preferably have an absolute particle size of less than 10 micrometers, a mean particle diameter of less than 0.1 micrometer, a specific surface area of more than 30 m.sup.2 /g and a degree of whiteness of more than 90%. The film is used as a dielectric in a capacitor and shows improved electrical properties.
摘要:
A measuring arrangement for registering an analyte concentration in a measured medium includes a three electrode arrangement having a working electrode, a reference electrode and a counter electrode. The working electrode includes an analyte-insensitive, redox mediator, and the reference electrode a pH-sensitive electrode. The counter electrode can be formed of an inert, electrically conductive material. The measuring arrangement can be embodied to provide a desired voltage between the working electrode and the reference electrode and to register the electrical current flowing, in such case, through the measured medium, between the counter electrode and the working electrode.
摘要:
A measuring transducer, which is embodied to produce and output a measurement signal dependent on the content of H+ and/or OH− ions present in a measured medium, wherein the measuring transducer has, in a region provided for contact with the measured medium, at least one polymer membrane selectively conducting H+ and/or OH− ions. The polymer membrane can comprise an H+ ion conducting polymer and/or an OH− ion conducting polymer.