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Prismatic Compass

Prismatic Compass

Product Code : JA-MI-3410

The prismatic compass (SKU JA-MI-3410) measures the magnetic bearings of survey lines, with the reading taken through a prism at the same moment as the sight. A strongly magnetised needle on a hard steel pivot carries an aluminium circle graduated to 30 minutes, housed in a brass or aluminium box of 100 or 125 mm diameter. JaincoLab makes the prismatic compass, with customisation available, for surveying practicals and field work.

Specifications

The prismatic compass has a brass or aluminium circular box of 100 or 125 mm diameter, a magnetised needle on a hard steel pivot, an aluminium circle graduated to 30 minutes (0.5 degree) with engraved inverted figures, and a sliding prism with coloured glasses and sighting slit.

ProductPrismatic Compass
SKUJA-MI-3410
BoxBrass or aluminium, circular, 100 mm or 125 mm diameter
NeedleStrongly magnetised, on a hard steel pointed pivot
Graduated circleAluminium, 30 minute (0.5 degree) graduations, engraved inverted figures
ReadingSliding prism with coloured glasses and sighting slit
CustomisationAvailable to buyer's needs

Applications of the prismatic compass

The prismatic compass is used to observe whole-circle bearings of survey lines in compass traversing, to check for local attraction and to take quick bearings in reconnaissance, and it is a standard instrument in surveying practicals.

  • Whole-circle bearings of survey lines
  • Open and closed compass traverses
  • Detecting and correcting local attraction
  • Reconnaissance and small-area surveys
  • Surveying practicals for civil engineering, polytechnic, ITI and geography students

Scope of supply and ordering

The listing covers the prismatic compass in brass or aluminium, 100 or 125 mm. Tripod, case and any custom features are confirmed on the quotation with quantities.

MOQ, lead time and packing for the prismatic compass are confirmed on each quotation for the size, material, quantity and delivery destination. Class sets for surveying laboratories and bulk quantities for institutes are supplied, including export to Africa, the Middle East and South and South-East Asia.

Frequently asked questions

Which sizes are available?
100 mm and 125 mm diameter boxes, in brass or aluminium.

What is the graduation of the circle?
The aluminium circle is graduated to 30 minutes (0.5 degree), with engraved inverted figures read through the prism.

Why are coloured glasses fitted?
They allow sights to be taken towards bright light, such as the sun, without glare.

Related products

Other surveying instruments are listed in the JaincoLab measuring instruments range.

Request a quote

To order the prismatic compass, send the quantity and delivery destination through the JaincoLab contact page or email [email protected]. Buying under a laboratory tender? Use our tenders page.

Last updated: September 2026

   
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Office Address

Jain Scientific Suppliers
2475-84, Hargolal Road,
Ambala Cantt, Haryana, India

[email protected]

+91-85699-09696

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