| 摘要 |
<p>The invention relates to a pressure switch provided with an opto-electronic device for fluid pressure control within a technological process, in an industrial field. According to the invention, the pressure switch comprises an opto-electronic subassembly (10) comprising an infrared light emitting diode and an infrared light receiving diode, respectively, which generate an electric signal which is taken over by an electronic amplification unit (8) provided with a relay or thyristor wherethrough there passes the electric current needed for the operation of a power electromotor, depending on the adjusted pressure, the force created by the working pressure in a sensing element (2) being balanced by the force inside a spring (5) suitably tensioned by a screw (6), any electrical commutation point in the operation range being reachable by tensioning the spring (5), where the opto-electronic device (10) can control directly an alternating current or direct current motor, can control various actuators or can be connected in an optic or acoustic warning circuit.</p> |
