Abstract: A method for bistably actuating an actuator includes applying positive pressure in an actuator fluid supply that is fluidly connected to an actuator chamber by means of an actuator fluid supply connection, wherein a working positive pressure is generated in the actuator chamber, whereby an actuator element fluidly connected to the actuator chamber is brought from a resting position to an actuation position, pressure-tight sealing of the actuator fluid supply connection, so that the working positive pressure in the actuator chamber is maintained and the actuator element remains in the actuation position.

Abstract: A pressure probe for detecting clathrates includes a probe wall defining an inside area. A window is arranged in the probe wall. A device including a circuit board having a surface is arranged below the window. A permittivity sensor and temperature sensor are arranged on the surface of the circuit board and in thermal contact with each other and with a temperature control device. An insulating layer is disposed on the surface of the circuit board over the permittivity sensor and the temperature sensor. The window includes a part of the insulating layer.

Abstract: A method for bistably actuating an actuator includes applying positive pressure in an actuator fluid supply that is fluidly connected to an actuator chamber by means of an actuator fluid supply connection, wherein a working positive pressure is generated in the actuator chamber, whereby an actuator element fluidly connected to the actuator chamber is brought from a resting position to an actuation position, pressure-tight sealing of the actuator fluid supply connection, so that the working positive pressure in the actuator chamber is maintained and the actuator element remains in the actuation position.

Abstract: A pressure probe for detecting clathrates includes a probe wall defining an inside area. A window is arranged in the probe wall. A device including a circuit board having a surface is arranged below the window. A permittivity sensor and temperature sensor are arranged on the surface of the circuit board and in thermal contact with each other and with a temperature control device. An insulating layer is disposed on the surface of the circuit board over the permittivity sensor and the temperature sensor. The window includes a part of the insulating layer.

Abstract: A device for controlling a flow of fluids through n=2m microfluidic channels, m being a natural number>0 includes a substrate having the microfluidic channels therein. Each channel includes m contact points. A respective heating element corresponds to each contact point. Each of a plurality of m pairs of conductor paths corresponds to a respective contact point of each of the microfluidic channels. Each pair includes a first conductor path that is in contact with a respective first half of the heating elements that correspond to the respective contact points of each microfluidic channel and a second conductor path that is in contact with a respective second half of the heating elements that correspond to the respective contact points of each microfluidic channel. A respective control line corresponds to each of the m pairs of conductor paths, where each control line is operable to actuate the corresponding pair of conductor paths with a switching status TRUE or a switching status FALSE.

Abstract: A device for controlling a flow of fluids through n=2m microfluidic channels, m being a natural number >0 includes a substrate having the microfluidic channels therein. Each channel includes m contact points. A respective heating element corresponds to each contact point. Each of a plurality of m pairs of conductor paths corresponds to a respective contact point of each of the microfluidic channels. Each pair includes a first conductor path that is in contact with a respective first half of the heating elements that correspond to the respective contact points of each microfluidic channel and a second conductor path that is in contact with a respective second half of the heating elements that correspond to the respective contact points of each microfluidic channel. A respective control line corresponds to each of the m pairs of conductor paths, where each control line is operable to actuate the corresponding pair of conductor paths with a switching status TRUE or a switching status FALSE.

Abstract: A device for creating a microfluidic channel structure includes two plates forming a chamber between the two plates. The chamber has at least one inlet for feeding a fluid into the chamber and at least one outlet for discharging the fluid out of the chamber. A cooling element is associated with at least one of the two plates for converting fluid disposed in the chamber into a solid. A plurality of heating elements is associated with at least a first of the two plates and distributed so as to provide, by a heating up of some of the heating elements so as to convert areas of the solid that are in a vicinity of the heating elements to the fluid, a channel structure leading from the at least one inlet through the chamber to the at least one outlet. The channel structure is configured to convey fluid flow.

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 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 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: In a device for controlling the speed of a motor vehicle in which a power-setting member for the internal combustion engine of the vehicle can be displaced via a switchable coupling by an electric motor, the electric motor receives the voltage necessary for the displacement of the power-setting member for the speed to be maintained from a control device, and the coupling is adapted to be switched by means of an electromagnet for separating the motor from the power-setting member when the device for controlling the speed is not in action. A first controllable switch is connected between one pole of the source of operating voltage and the electromagnet and a second controllable switch is connected between the other pole of the source of operating voltage and the electromagnet. The switches are adapted to be switched into conductive state by means of an operating element.