Quick Answer: The Spot Reflecting Galvanometer detects very small currents with a taut-band suspended coil and a light spot projected onto a 150 mm or 200 mm scale. Sensitivity is up to 20–30 mm/µA, depending on model.
Last updated: October 2026
Key Features
Taut-band (ligament) suspension
Built-in 6 V / 0.5 A projection lamp with light-spot reading
150 mm or 200 mm scale
Sensitivity up to 20–30 mm/µA, depending on model
Internal resistance typically 100 to 500 ohm
Bakelite or ABS housing with internal mirrors
Technical Specifications
Specification
Value
Suspension
Taut-band / ligament
Lamp
6 V / 0.5 A projection lamp
Scale
150 mm or 200 mm
Sensitivity
Up to 20–30 mm/µA (by model)
Internal resistance
Typically 100 to 500 ohm
Housing
Bakelite / ABS
About This Product
The light spot works as a long, weightless pointer, so a tiny turn of the coil shows as a clear movement on the scale. The galvanometer is used for balancing bridges and other null-method circuits and for measuring minute currents in high-resistance circuits.
Frequently Asked Questions
How sensitive is the Spot Reflecting Galvanometer?
Sensitivity is up to 20–30 mm per microampere, depending on the model.
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