Rotating Torquemeters measure shaft-torque. A practical example is measuring the torque generated by an electric motor as it turns a generator. Or the torque developed as an engine drives a pump.
Strain Gages are bonded to the shaft inside the torquemeter. The challenge is: how can you supply power to the Gages (and receive a signal back), when the shaft is rotating? The answer lies in a rotary transformer, developed & patented by Mr. Sid Himmelstein in the 1960's.
Fast-forward half a century and S. Himmelstein & Co. manufactures a broad range of dozens of torquemeter models spanning the entire range from 'a few ounce-inches' to 'millions of pound-force'.
Reaction Torquemeters are simpler devices. They do not rotate. They measure the torque resulting from being twisted. Think of them as the torque-equivalent of a load cell. A broad range is offered here too. This type of Torquemeter can be matched to virtually any strain gage amplifier, or choose a newer design with internal amplification!
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