Patent ID: 6329611
Filing Date: 2001-12-11
Classification: G01G

Abstract:
An apparatus for measuring weight/force of a substance comprising:a measuring unit having a transducer;a partition member provided between a measuring space in which said measuring unit is arranged and a substance space in which the substance whose weight/force is to be measured is placed, said partition member having a hole formed therein, said measuring space being communicated with said substance space through said hole;a force transferring member extending through said hole formed in the partition member such that a first end of said force transferring member situates within said substance space and a second end of said force transferring member situates within said measuring space and is coupled with said transducer;a magnetic fluid provided in a space within said hole such that said substance space and measuring space is isolated from each other in a liquid tight manner by means of said magnetic fluid; anda magnetic force generating means for producing a magnetic force such that said magnetic fluid is kept in position by said magnetic force.