The apparatus has been designed to illustrate the basic features of electrical resistance strain gauges and their application in measuring bending and torsion.
A cantilever has a single gauge bonded onto its surface, and an identical gauge is fixed to an unstressed piece of the same material for temperature compensation. The two gauges form part of a wheatstone bridge which has a balancing potentiometer, and whose meter is calibrated directly in microstrains.
The cantilever is loaded by the Load hanger and calibrated weights hung from its free end. A torsion bar is also supplied having two gauges bonded orthogonally at 45º. A detailed label on the unit shows the wheatstone bridge arrangement and how the specimen strain gauges connect into the circuit.
![ELECTRICAL RESISTANCE STRAIN GAUGE ELECTRICAL RESISTANCE STRAIN GAUGE](/sites/default/files/styles/product_gallery/public/product-images/hsm18.jpg?itok=jZNoCWK4)
![ELECTRICAL RESISTANCE STRAIN GAUGE ELECTRICAL RESISTANCE STRAIN GAUGE](/sites/default/files/styles/product_gallery/public/product-gallery/HSM18%231.jpg?itok=7w5l5H2I)