Abstract: In a method for providing measured values for end customers: The measured value for a process variable is recorded using a sensor and is transmitted to a process control system. The number of transmission operations is counted on the basis of the number of transmission operations. The fundamental advantage of the invention is that the end customer no longer pays for the sensor itself, but rather only for that which he actually requires, the measured value.

Abstract: In a method for the function checking of a process-automation field device, a radio signal is transmitted from a transmitting unit to the field device, and, with the help of this radio signal, a query of the device status is triggered in the field device. Depending on the result of the query of the device status, a corresponding, perceivable signal is produced.

Abstract: In a method for providing measured values for end customers:

Abstract: The invention relates to a hydraulically actuated bar-like clamping tool with an elongated base body (1), a reciprocating elongated clamping body (2) and a tubular inflatable body (18) arranged between both said bodies for moving the clamping body. The inflatable body is secured in a fluid-tight manner at one end and is connected to a fluid connection at its other end. The base body (1) and the clamping body (2) consist each of a U-shaped section with meshing legs (9;10). A reciprocating, elongated thrust piece (15) supported on the ends of the legs of the clamping body (2) and a fixed, elongated abutment (13) are arranged between the legs (9) of the base body (1). The tubular inflatable body (18) extends on the one hand between the base body (1) and the pressure member (15) and after it is deflected it extends on the other hand between the abutment (13) and the clamping body (2). The U-shaped base body (1) has a close-off arrangement (3) at least at its end provided with the fluid connection (3a).

Abstract: The pressure sensor comprises a base body and diaphragm which are assembled at a defined distance apart parallel to each other to form a chamber, at least one of the two assembled parts consisting of ceramic, glass, metal or a monocrystalline material. In dependence upon the external pressure acting on the pressure sensor the distance between said parts and thus the capacitance between two electrodes carried by said parts changes. The base body and the diaphragm are firmly connected together by a shaped part of metal serving at the same time as spacer. If at least one of the two parts consists of ceramic, glass, metal or a monocrystalline material, the two joined parts can be soldered together by a shaped part of active solder. If the two assembled parts consist of oxide ceramic or sapphire they can be connected together by the direct copper bonding method. In this case the shaped part consists of copper which is connected to the two parts by a eutectic melt forming at the surface.

Abstract: The capacitive pressure sensor (10) has two disks (11, 12) of alumina which are joined together around the periphery in a defined spaced relationship and parallel to each other, forming a chamber (14). At least one of the two disks (11) is designed as an elastic diaphragm. A pure nickel coating (16, 18) is applied to the surface of each disk by electroless deposition from an aqueous solution, and on the surfaces of the two disks facing each other, capacitor electrodes (17, 20, 21) are formed by patterning the nickel coating. The capacitor electrodes are connected to an electronic circuit disposed outside the chamber (14) by additional nickel coatings which are formed in plated-through holes (30, 31, 32) simultaneously with the deposition of the pure nickel coating.