Quick Answer: Tangent Galvanometer measures small electric currents by the tangent law, using an insulated copper coil of about 162.5 mm diameter with windings of 2, 50 and 500 turns and a detachable compass box at its centre.
Last updated: October 2026
Key Features
Insulated copper coil on a non-magnetic Bakelite bobbin, about 162.5 mm in diameter
Three windings of 2, 50 and 500 turns, with 4 terminals marked for each coil
Coil rotates on a vertical axis through its centre; non-magnetic tripod metal base with levelling screws
Aluminium dial, 100 mm diameter, graduated 0-90° four times, with anti-parallax mirror
Agate-centred magnetic needle with aluminium pointer for damping
Detachable compass box (magnetometer) that can be used separately
Technical Specifications
Specification
Value
Coil diameter
About 162.5 mm
Windings
2, 50 and 500 turns
Terminals
4, marked for each coil
Dial
Aluminium, 100 mm diameter, 0-90° four times
Needle
Agate-centred, aluminium pointer
Base
Non-magnetic tripod metal base with levelling screws
About This Product
This piece of physics lab equipment from the Lab Meters range measures small currents: current through a chosen winding sets up a magnetic field at the coil centre, and the needle deflection is read on the 0-90° dial against the anti-parallax mirror.
Frequently Asked Questions
Q1. Why does the coil have three windings? It has three sets of windings of 2, 50 and 500 turns, connected through 4 marked terminals, so a different number of turns can be selected for an experiment.
Q2. Can the compass box be used on its own? Yes. The compass box (magnetometer) at the centre of the ring is detachable and can be used separately for magnetometer work.
Our export customers include schools, colleges and dealers in Bangladesh, Chad and Suriname.
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