Patent ID: 8882492

Claim:
A system comprising: an electromagnetic valve having an actuator rod with a first coil and a second coil positioned at different longitudinal locations on the actuator rod and being situated electrically parallel to one another in an electrical circuit, the electromagnetic valve constructed to induce a first voltage in the second coil when the electromagnetic valve is in the open position and to induce in the second coil a second voltage lower than the first voltage when the electromagnetic valve is in the closed position, the first and second voltages being induced by the first coil; a control device situated in series with the second coil in the electrical circuit and adapted to detect the open or closed position of the electromagnetic valve based on the induced voltage of the second coil; and a switch located within the electrical circuit, the switch changeable between a first position and a second position, the control device adapted to act upon the switch to change it between the first and second positions, wherein when the switch is in the first position, the circuit is configured to allow electrical current from a power source to be delivered to the second coil and wherein when the switch is in the second position, the circuit is configured to not allow electrical current from a power source to be delivered to the second coil.