Quick Answer
What is the David White LM800?
See also: Nikon AC-2S Automatic Level
See also: Pentax AP-241 Automatic Level
The David White LM800 is a 26x magnification automatic optical level with a compensator range of ±15', accuracy of 1mm per km, and rugged construction for general construction and site grading work.
David White LM800 — Complete Specs, Manual & Guide
Category: Optical Level | Brand: David White | Model: LM800
The David White LM800 is a professional-grade automatic optical level designed for construction layout, earthwork grading, and elevation transfer. The LM800 uses a pendulum compensator for automatic horizontal plane establishment, eliminating the need for manual leveling screws. It is a popular choice for contractors who need a reliable, accurate level at a competitive price point, backed by David White's North American service network.
David White LM800 Full Specifications
| Magnification | 26× |
| Objective aperture | 36mm |
| Accuracy (standard deviation) | 1.0mm per km double run |
| Compensator type | Pendulum (magnetic damping) |
| Compensator range | ±15' |
| Field of view at 100m | 2.5m |
| Minimum focus distance | 0.5m |
| Circular level sensitivity | 8'/2mm |
| Horizontal circle | 360° graduated in degrees |
| Weight | 1.6 kg |
| Tripod mount | 5/8" × 11 thread |
Included Accessories
- Hard carrying case — Foam-lined for transport and storage
- Sunshade — Reduces glare on the objective lens
- Lens cloth — For cleaning optics
- Adjustment tool — For cross-hair reticle adjustment
Frequently Asked Questions — David White LM800
How accurate is the David White LM800?
The LM800 achieves 1.0mm per kilometer double-run accuracy, which is suitable for most general construction layout, earthwork grading, and floor level checking. For high-precision survey work requiring sub-millimeter accuracy, a digital level is recommended.
Is the LM800 compatible with standard survey tripods?
Yes. The LM800 uses a standard 5/8" × 11 thread mount, which is compatible with virtually all construction and survey tripods on the market. It also works with grade rod clamps and tribrach adapters using the same thread.
How do I level the LM800 before use?
Place the instrument on the tripod, roughly level by adjusting tripod legs until the circular bubble is centered. Use the three footscrews to fine-level the circular bubble. Once the circular bubble is centered, the automatic compensator handles final horizontal plane establishment within the ±15' compensator range.
What is the difference between the LM800 and LM800D?
The LM800D adds a digital display rod with horizontal distance measurement capability. The standard LM800 is a conventional optical level requiring a staff rod for all measurements. The LM800D is the preferred choice when horizontal distances need to be measured simultaneously with elevation differences.
Related models: Nikon AC-2S | Pentax AP-241
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