Prismatic Compass Manufacturer,Supplier and Exporter in India
Product Code : EL-MI-3410
Jlab Export is a leading Prismatic Compass Manufacturer,and suppliers in India
Prismatic Compass (code EL-MI-3410) is a surveying compass that reads the whole-circle bearing of a line through a prism while the line is being sighted. A strongly magnetised needle balances on a hard steel pivot in a circular brass or aluminium box of 100 mm or 125 mm diameter and carries an aluminium ring graduated to 30 minutes. Each prismatic compass is made by JLab in Ambala, India, and can be customised to order.
Specifications
| Parameter | Detail |
|---|---|
| Box | Circular, brass or aluminium |
| Box diameter | 100 mm or 125 mm |
| Needle | Strongly magnetised, on a hard steel pointed pivot |
| Graduated ring | Aluminium, carried by the needle |
| Graduation | 30 minutes |
| Figures | Engraved, inverted |
| Prism | Sliding, with coloured glasses and a sighting slit at the top |
| Customisation | Made to order |
| Quality check | Each prismatic compass is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-MI-3410 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Sighting and Reading in One Step
The compass is held level, the prism is slid into place and the object is sighted through the slit at its top. Because the graduated ring travels with the needle, it stays pointed to magnetic north while the box turns, and the prism shows the graduation that lies under the line of sight: the whole-circle bearing, counted clockwise from magnetic north. The figures are engraved inverted so that the prism shows them the right way up, and the prism magnifies the graduations so the reading can be taken to 30 minutes, or half a degree.
Box Sizes and Fittings
Two box diameters are made, 100 mm and 125 mm, each in brass or aluminium. The coloured glasses on the prism are brought into the line of sight to cut glare when a bright object is observed. Other changes can be built in to the buyer’s requirements.
Other Field Compasses and a Tripod
- Survey Compass — aluminium or brass compass supplied in a case with a tripod.
- Brunton Compass — geologist’s compass for measuring inclination and strike.
- Tripod Stand — brass and aluminium stand with adjustable legs for surveying instruments.
More compasses, levels and theodolites are in Measuring Instruments, a part of Survey Equipment.
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Last updated: 29 October 2026
