“K4” adjustable pressure switches permit opening or closing of an electric
circuit upon reaching predetermined pressure value . The preset pressure is
found by rotating the external screw located at the centre of the instrument
clockwise to increase and vice-versa to decrease the pressure set point value.
Mechanical stops protect both the spring and the micro-switch. from over
pressurization. The main characteristic of this series is that this miniature
pressure switch can be totally dismantled.

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