| 摘要 |
<p>The present invention relates to a pneumatic sensor for measuring distances in heavy conditions, especially e.g. on tool machines exposed to impurities like fats, chips, dust or increased temperature. The sensor is incorporated into a pneumatic circuit, which comprises at least one pressure measuring device, wherein said sensor consists of a closed casing (1) with a charging member (22) , as well as of a compressed-air passage (2) in which a closing member (3) is foreseen together with a corresponding sealing seat (21) , which enables opening or closing said passage (2) for compressed air. The closing member (3) is supported by a spring (5) and pressed towards the reference member (4) , which extends coaxially with respect to said spring (5) and protrudes partially outwards from said casing (1) and is moreover displaceable in its longitudinal direction over a predetermined distance (L) .</p> |
