The invention relates to a sensor and
evaluation system for capturing data at a measuring
station (3), in particular for use in double sensors for determining end positions and limit values. The individual sensors (1, 1', 2, 2', 16, 16') are operated as sensor pairs (1'', 2'', 16'') by a largely shared
control circuit consisting of two connecting lines (5, 6) with an
electric current or
voltage of alternate polarity. A state of a sensor (1, 1', 2, 2', 16, 16') is transmitted on the corresponding half-wave of the sensor current and evaluated by a switching
amplifier (13) in relation to polarity and amplitude. Said sensor and
evaluation system reduces the number of connecting lines required. In addition, interference from neighboring sensors is largely excluded, so that sensors can be mounted more closely together in a
system. Said sensor and
evaluation system is especially suited for equipment required to comply with the DIN 19234 (NAMUR) standard.