An auto level — automatic compensator optical level in 24×, 28× and 32× magnification for precise construction and road levelling surveys. Multi Trade Combines stocks and demonstrates in Guwahati for Northeast India; price on request.
The automatic level, known universally as the auto level, is the workhorse instrument of construction site surveying. Using a pendulum compensator mechanism, it automatically maintains a horizontal line of sight within a working range of ±15 minutes of tilt — the operator merely rough-levels using the three footscrews and the circular bubble, then the compensator does the rest. Multi Trade Combines in Guwahati stocks auto levels in 24×, 28× and 32× magnification, covering everything from routine building set-out to precise levelling traverses for infrastructure projects across Northeast India.
The auto level is used with a graduated levelling staff (typically 4 m or 5 m aluminium E-staff) to determine height differences between points. The surveyor reads the horizontal cross-hair on the staff at each instrument setup, records the staff reading, and combines the readings across a chain of instrument positions to derive precise elevation differences. For a new building, the auto level transfers the slab-soffit level from a benchmark to the formwork shuttering props, ensuring a flat and level slab. For road construction, it checks the formation level and finished-surface gradient at intervals across the width.
Northeast India's active construction sector — covering PMAY housing under GMDA, NHIDCL highway expansions, BRO mountain road construction in the border states, and the ambitious railway network expansion — keeps site survey teams working continuously. Every civil contractor, surveyor-of-works and site engineer in the region relies on an auto level as their primary day-to-day instrument. We support contractors in Guwahati, Shillong, Jorhat, Dimapur, Agartala and across all NE states with instrument supply, demonstrations and accessory stocking.
| Category | Surveying Instruments |
|---|---|
| Magnification | 24× / 28× / 32× magnification |
| Compensator Type | Magnetic damping, automatic (±15' working range) |
| Objective Aperture | 40–45 mm (model-dependent) |
| Staff Reading Range | Up to 100 m with standard 4 m staff |
| Standard | ISO 17123-2 / BIS guidelines |
| Availability | In stock — price on request |
Civil construction contractors working on residential apartment blocks in Guwahati's expanding suburbs use auto levels on every floor cycle to check formwork and slab levels. Government PWD and irrigation department field officers carry auto levels on road surveys and canal-lining projects. PMGSY rural road contractors are required to submit levelling cross-sections; the auto level is the standard instrument for these submissions. BRO road-opening parties in Manipur, Nagaland and Arunachal Pradesh keep auto levels in their survey sets for road-formation level checks. Tea-estate civil-works supervisors use them for factory-floor and drainage grading. ITI and polytechnic surveying students across Assam learn on auto levels as their first instrument — Multi Trade Combines supplies institutions at education-sector pricing.
An auto level is always used with a levelling staff (4 m or 5 m aluminium E-staff), a surveying tripod (aluminium or wooden), and a field book. A staff bubble ensures the staff is held vertically. For soft ground, tripod shoes with points prevent settling. A total station complements the auto level for combined angle-and-distance work on more complex surveys. Laser levels serve as a faster alternative for indoor formwork setting on small jobs. Multi Trade Combines stocks tripods, levelling staffs, staff bubbles and all accessories for complete auto-level survey kits.
An automatic level (auto level) is an optical surveying instrument used to establish a horizontal line of sight so that elevation differences between points can be measured with a staff or levelling rod. On construction sites it is used for setting formwork levels, checking slab flatness, transferring benchmarks, road grading and drainage-gradient surveys. The compensator mechanism automatically levels the line of sight within a small tilt range, removing the need to manually level as precisely as a tilting level requires.
For most building and road construction set-out work, a 24× or 28× auto level provides adequate magnification to read a 4 m staff accurately at 60–80 m range. For control levelling over longer distances — benchmarking across bridge sites or irrigation project networks — a 32× model gives better precision at 100 m+ ranges. Multi Trade Combines stocks 24×, 28× and 32× auto levels in Guwahati — call +91 91812 13332 for stock and pricing.