Patent ID: 8528430

Claim:
A device included in a system for measuring of pressure and/or temperature of a fluid and where the device is a measuring needle complete ( 1 ), where measuring needle complete comprises a measuring needle housing ( 6 ) with a hose nipple ( 7 ) for connecting a measuring hose ( 5 ), and where, in the measuring needle housing ( 6 ), a non return valve ( 8 ), a reset spring ( 13 ), a probe ( 10 ) and a lock washer ( 15 ) is provided, wherein the non return valve ( 8 ) is displaced into a cavity ( 20 ) of the measuring needle housing ( 6 ) in connection with that the measuring needle complete is mounted on a measuring nipple ( 3 ), whereby a communication is opened from the fluid via a first opening ( 11 ) in the probe ( 10 ), through the probe and further via a second opening ( 12 ) in the probe to the non return valve ( 8 ) and its center part ( 21 ) where the center part is provided with a hole ( 26 ) outwards to the cavity ( 20 ) and further via a cavity ( 25 ) to the hose nipple ( 7 ) and finally further via the measuring hose ( 5 ) up to a measuring instrument ( 4 ), and the communication is opened by that the non return valve ( 8 ) and its upper part ( 18 ) is moved as far backwards in the cavity ( 20 ) until the center part ( 21 ) in the non return valve has reached a position where an open communication with the cavity ( 25 ) is provided.