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Sealed load or force sensor e.g. for weighing - has deflection member with internal fluid damping and strain gauge elements in corrosion resistant housing with metal sealing membranes for receiving load applicator input.
Sealed load or force sensor e.g. for weighing - has deflection member with internal fluid damping and strain gauge elements in corrosion resistant housing with metal sealing membranes for receiving load applicator input.
A load/force sensor (1) has a twin beam deflecting element (2) of aluminium alloy having a rectangular cross-section which is supported as a cantilever at a first end (3) within a corrosion resistant steel housing (5) of similar cross-section with sealed ends (11, 12) and provided with strain gauges. The second end (4) of the deflecting element (2) carries a load applicator (6) which is sealed wrt the housing (5) by rustless steel membranes (7, 8). The centre space (18) of the deflecting element (2) contains a flexible metallic piston type bellows unit (20, 21) filled with a fluid which exerts a damping influence on any oscillations initiated by the load or by external vibration. USE/ADVANTAGE - Fully sealed construction, which minimises effects of pressure, temperature, humidity or aggressive atmospheres and solvents. Damping enables use in high speed weighing installations eg in foodstuffs packaging industry.
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