Abstract: In a programmable control means for switching timers or chronometers, a magnetic field sensor having a ferromagnetically alloyed wire is disposed on a program carrier. A coil is brought into the proximity of the wire. A permanent magnet adjacent thereto has a magnetic field which influences the core polarity of the wire such that the coil emits voltage pulses given polarity changes therein for the control of an electric or of an electronic switch. According to the invention the sensor wire is releasably disposed on the program carrier.
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