| 摘要 |
<p>A device for measuring of pressure or temperature in a heating or cooling system and where the device is a measuring needle complete (1) build up of a measuring needle housing (6) with one in a cavity (20) spring-loaded non return valve (8), where the non return valve in measuring position has an open communication from the probe (10) via the measuring needle housing and a hose nipple via a hose to a measuring instrument and where this open communication is closed immediately as soon as the measuring is completed and the measuring needle (1) is removed from the measuring nipple and by this immediate closing a leakage is prevented from the, after measuring, enclosed fluid that exists in the complete measuring needle (1) and the measuring hose (5).</p> |
