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A resistor symbol with a diagonal arrow or a zigzag foil pattern.
Also known as: Strain gauge, Foil gauge, Deformation sensor, Resistor with a diagonal arrow across it
A strain gauge is a resistor whose resistance changes very slightly when it is stretched — typically a few parts in a thousand. That tiny change is why gauges are almost always wired into a bridge circuit rather than measured directly.
Denotes a strain gauge: a resistive element whose resistance varies with mechanical deformation.
Contexts: Electrical equipment
Produces a resistance change of the order of a tenth of a per cent at full scale, which is why it is measured in a Wheatstone bridge rather than directly.
Contexts: Electrical equipment
Is temperature-sensitive as well as strain-sensitive, which is why bridges use dummy gauges for compensation.
Contexts: Electrical equipment
A rectangle or zigzag resistor outline with a diagonal arrow drawn across it, or a serpentine foil pattern on a backing outline.