Abstract: In a sensor on the basis of surface wave components disposed in a housing with at least one surface wave component, a fluid channel and conductors for high frequency signals, the conductors are connected to coupling capacitors with capacitive coupling surface areas which are arranged opposite each other on the housing and the surface wave equipment and closely adjacent one another so that high frequency signals can be transmitted to, and from, the surface wave components.

Abstract: In a mass-sensitive sensor consisting of an acoustic surface wave component on the basis of shear waves, the sensor includes a substrate with an active surface carrying two different layers, one which is a parylene layer of a thickness of between 0.2 and <1.6 ?m, which has been produced on the substrate by a vacuum-based deposition method and is capable of generating Love waves and the second layer forms a utilization layer, which interacts with an analyte disposed in a medium contacting the utilization layer.

Abstract: Devices are disclosed for the display of the “activated” or “deactivated” state of electromagnetic or acousto-magnetic security tags, whereby it is possible to recognize, at a glance, whether the goods, for example on a pallet, have activated or deactivated security tags.

Abstract: In a method for producing surface wave sensors on the basis of a surface wave building component a polymer parylene film with a thickness of 20 to 200 nm is applied to a hydrophilic sensor surface of the surface wave building component by deposition from the gas phase, whereby the hydrophilic sensor surface becomes hydrophobic, the surface is then subjected to plasma activation to render it hydrophilic and a hydrophilic sorption polymer layer is then applied to the parylene film so as to provide a surface wave sensor with a homogenous sorption polymer layer.

Abstract: Security elements used to secure goods, as well as castings or injection-molded parts containing such security elements, for protection against theft are encased in a powder lacquer layer. Security elements for protecting goods contain soft magnetic and hard magnetic components. When a magnetic alternating field is applied to the soft magnetic components, they are excited in order to emit a characteristic signal. The hard magnetic components are located on the soft magnetic components in such a way that the hard magnetic components, in their magnetized state, prevent the emission of the characteristic signal of the security element. In order to protect the security elements, in particular against detachment of the soft magnetic components from the hard magnetic components, the security components are at least partially encased in a layer of powder lacquer.

Abstract: Devices are disclosed for the display of the “activated” or “deactivated” state of electromagnetic or acousto-magnetic security tags, whereby it is possible to recognize, at a glance, whether the goods, for example on a pallet, have activated or deactivated security tags.

Abstract: A method and device for activation of large quantities of security elements for the electronic article protection. The security elements are exposed to at least one magnetic field produced by one or more coils carrying a line current subjected to sine oscillations. The coils are supplied with current pulses that are shorter than the sine oscillations. The amplitude of the current pulses diminishes as a function of time.

Abstract: In a method for producing surface wave sensors on the basis of a surface wave building component a polymer parylene film with a thickness of 20 to 200 nm is applied to a hydrophilic sensor surface of the surface wave building component by deposition from the gas phase, whereby the hydrophilic sensor surface becomes hydrophobic, the surface is then subjected to plasma activation to render it hydrophilic and a hydrophilic sorption polymer layer is then applied to the parylene film so as to provide a surface wave sensor with a homogenous sorption polymer layer.

Abstract: A grain product is provided that contains flaked grains stabilized in a solid foam matrix that contains no added fat and cohesively binds together the flaked grains. The solid foam matrix has an expanded volume formed by introduction of a gas, which may be formed in situ by evolution of a gas upon reaction of at least one gas-releasing compound with at least one material selected from the group consisting of an acid or an acidic salt when the foam matrix materials are in a fluid state. Preferably, the gas-releasing compound is a leavening agent or virtually any chemical compound that, by reaction with another compound, results in the evolution of a gas in a sufficient amount to form the desired liquid foam that can be dried or cured to form a solid foam matrix. The flaked grain product typically having a density in the range of from about 22 lb/ft3 to about 31 lb/ft3.

Abstract: In a sensor comprising a housing, through which a medium to be examined is conducted, the housing includes at least two passive building components capable of oscillating and oscillator circuits of which each includes an amplifier component and a variable phase shifting component providing for a phase shift range sufficiently large to switch the oscillating components off while the amplifier component remains operating.

Abstract: In a gas sensor comprising a housing and having driver and amplifier circuits the housing has a bottom part with at least four cavities arranged in radial symmetry around a central gas admission space from which gas admission passages of the same shape and size extend radially outwardly to the various cavities for supplying gas to be measured to surface wave components of which one is disposed in each of the cavities and the cavities have discharge passages extending outwardly and having all the same gas flow resistance for the discharge of the gases from the housing cavities.

Abstract: A high-sensitivity surface wave gas sensor in which the interaction of a surface wave field with a solid film suitable for adsorbing the gas to be determined causes a change in the frequency of an oscillating circuit containing a surface wave delay line as a function of the type and concentration of the gas entails the delay line provided for adsorption of the gas being completely coated with the solid film, and the dimensions of the delay lines being such that the length of the surface wave transformer is greater than that of the delay line.