Abstract: The positioner having an air circuit including magnetism generating portions producing magnetism based on a current in accordance with a difference between a valve opening setpoint of a regulator valve and a measured value for the valve opening, to generate a pneumatic signal wherein the air pressure is adjusted based on the magnetism produced by the magnetism generating portions, where this pneumatic signal is supplied to an operating device of the regulator valve, where the magnetism generating portions are connected in parallel, and including a plurality of coils connected through magnetically additive coupling.

Abstract: A diagnosis unit determines a first degradation degree of a display device on the basis of a measured illuminance calculated from an output of a photo sensor, compares the first degradation degree with a degradation threshold, and outputs a corresponding diagnosis when the first degradation degree reaches the degradation threshold.

Abstract: The positioner having an air circuit including magnetism generating portions producing magnetism based on a current in accordance with a difference between a valve opening setpoint of a regulator valve and a measured value for the valve opening, to generate a pneumatic signal wherein the air pressure is adjusted based on the magnetism produced by the magnetism generating portions, where this pneumatic signal is supplied to an operating device of the regulator valve, where the magnetism generating portions are connected in parallel, and including a plurality of coils connected through magnetically additive coupling.

Abstract: An electrode structural unit is fitted into, and held removably in, a portion of an inner peripheral wall of a case. The electrode structural unit has insulating material as a substrate, and is provided with a plurality of through-electrodes through that pass through the insulating material in the vertical direction. Bottom face electrode surfaces that are exposed on the bottom face of the electrode structural unit are brought into contact with electrodes for connecting to the various types of electrode components within the case. The top face electrode surfaces that are exposed on the top face of the electrode structural unit are caused to contact the electrodes that are formed on the circuit board.