Quick Answer: The Compass, Magnetic Plotting, Both Side Transparent is a 20mm plotting compass with a transparent housing on both faces, so the needle can be seen from either side or on an overhead projector. Its carbon steel needle sits on a low-friction pivot.
Last updated: October 2026
Key Features
Double-sided transparent polymer housing
20mm diameter small-format body
Carbon steel needle balanced on a low-friction pivot
Readable from both faces
Suitable for showing field plots to a class on an overhead projector (OHP)
Technical Specifications
Specification
Value
Diameter
20mm
Housing
Transparent polymer, both sides
Needle
Carbon steel on low-friction pivot
HS Code
9014.10.00
About This Product
Plotting compasses are moved step by step around a magnet or current-carrying wire to trace the direction of the magnetic field. With both faces clear, the teacher can place the compass on an overhead projector and show the needle direction to the whole room. Educational Instrument can dispatch the Compass, Magnetic Plotting, Both Side Transparent to laboratories in Maldives, Laos, Philippines, Bosnia and Herzegovina and Mauritania.
Frequently Asked Questions
Can this plotting compass be used on an overhead projector?
Yes. Both faces of the housing are transparent, so the needle shows through when the compass is placed on an OHP.
