Prismatic Compass Manufacturer,Supplier and Exporter in India
Product Code : EL-SI-12469
Quick Answer: The Prismatic Compass is a compass in a brass or aluminium circular box of 100/125 mm diameter, with a magnetised needle on a hard steel pointed pivot and a sliding prism with a sighting slit for reading the graduations.
Last updated: October 2026
Key Features
- Brass or aluminium circular box, 100/125 mm diameter
- Magnetised needle on a hard steel pointed pivot, balanced at the centre of the box
- Aluminium circle graduated to 30 min, with engraved inverted figures
- Sliding prism with coloured glasses and a sighting slit magnifies the graduations
- Can be customised to customer needs
Technical Specifications
| Specification | Value |
|---|---|
| Box | Brass or aluminium, circular |
| Diameter | 100/125 mm |
| Needle | Magnetised, on a hard steel pointed pivot |
| Circle | Aluminium, graduated to 30 min, engraved inverted figures |
| Sighting | Sliding prism with coloured glasses and sighting slit |
About This Product
A prismatic compass is a hand-held instrument used to measure the bearing of a line. The observer sights the object through the slit while reading the graduated circle through the prism, so the bearing is taken in one step. It is used in surveying and civil engineering practicals for compass traversing and for plotting directions. In this model the graduations are magnified by the sliding prism, and the compass can be customised to the customer's needs.
Frequently Asked Questions
Q1. What diameter is the Prismatic Compass box?
The circular box, in brass or aluminium, has a diameter of 100/125 mm.
Q2. How are the graduations read on the Prismatic Compass?
They are magnified by a sliding prism fitted with coloured glasses and a sighting slit at the top.
Q3. Can the Prismatic Compass be customised?
Yes. It can be customised to the customer's needs.
Related: Surveying Instruments, Drum Compass, Four Way Compass, Box Sextant, Line Ranger.
For a quotation on the Prismatic Compass, contact School Lab Equipment India.