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Member #620428

Member Since: November 21, 2014

Country: United States

  • @774106 - With this type of load cell, you could construct a brake dynamometer (https://en.wikipedia.org/wiki/Dynamometer). You would need something for the shaft to turn against, for example a water brake, eddy current discs, electric motor, etc. That brake would be mounted on a bearing, allowing it to turn. A bar or post mounted radially to the brake is used to scale the amount of force you want (longer = less force measured at the end). That is where you attach a load cell like this, the other end of the load cell would be mounted rigidly.

    If you want a true torque sensor, which measures the deflection of a rotating shaft, and then provides that voltage to instrumentation via a slip ring, be prepared for much more expensive components.

  • Casey, not sure if this is still relevant to you six months later... but in general when specifying something like a polymer for a peristaltic pump you should be looking for solvent compatibility. Many polymer suppliers will have tables that give at least a general ideal of whether something is suitable for use with a particular fluid. They often come with caveats, however, like the operating temperature. Frequently any tests conducted were probably a room temperature.

    Sometimes you might have to worry about a chemical reaction, say if you were pumping something like concentrated sulfuric acid. In the case being discussed here, the alcohol is likely just acting as a solvent.

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