Adjustable pressure switches allow the commutation of a micro-switch with exchange contact. The preset pressure is adjustable through a regulated screw put inside the instrument and protected by an external closure plug. Of compact and economical construction, the “K7” pressure switch is suitable for systems not requiring a constant alteration of the operating point, conversely, the possibility to block the protection plug can avoid unwanted or unintentional changes of the same value. Mechanical stops protect both the spring and the microswitch from over pressurization.
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