Bosch optical level mounted on tripod with vertical leveling rod; setup used for measuring elevation differences on construction sites
Bosch GOL 32 D optical level with telescope, leveling screws, and circular scale; designed for precision in surveying and construction.
Labeled diagram of Bosch GOL 26 optical level showing features like 26X lens, bubble vial, quick sight, and durable housing.
Person operating Bosch automatic optical level on tripod at active construction site; dirt piles and buildings visible in background.
Person using an optical level mounted on a tripod at a construction site; measuring elevation with surrounding infrastructure and materials.
Bosch optical level mounted on tripod with vertical leveling rod; setup used for measuring elevation differences on construction sites
Bosch GOL 32 D optical level with telescope, leveling screws, and circular scale; designed for precision in surveying and construction.
Labeled diagram of Bosch GOL 26 optical level showing features like 26X lens, bubble vial, quick sight, and durable housing.
Person operating Bosch automatic optical level on tripod at active construction site; dirt piles and buildings visible in background.
Person using an optical level mounted on a tripod at a construction site; measuring elevation with surrounding infrastructure and materials.
BOSCH

Bosch Optical Level GOL 26 CK 26X Magnification (Self Leveling Compensator Plus Minus 1/16 Inch Accuracy 330 Feet Range Tripod Grade Rod Kit)

In stock
SKU: GOL 26 CK
$349.00 USD

Description

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Bosch GOL 26 CK 26X Automatic Optical Level Kit

The Bosch GOL 26 CK Automatic Optical Level Kit is a high-precision surveying and land layout instrument engineered for land grading, foundation footings, concrete slab pouring, and site elevation transfer tasks. Featuring a 26X magnification telescope lens with a large aperture, this optical sight delivers a 330-foot working range with a leveling accuracy rating of ±1/16 in. at 100 ft. Outfitted with a magnetically dampened wire-hung compensator with an automatic transport lock, horizontal drive screws, Stadia lines for distance calculation, and a circular bubble vial with a 90-degree penta prism, this complete kit includes a heavy-duty aluminum tripod and leveling grade rod.

Best Used For:

  • Building Foundation & Footing Leveling: Establishing flat concrete form elevations and verifying grade depth prior to foundation pours.
  • Civil Land Grading & Drainage Mapping: Calculating slope angles and elevation differentials across 330-foot site radii using Stadia line reticles.
  • Commercial Structural Framing Alignment: Verifying horizontal sill plate parallelism and column height benchmarks across structural steel bays.

Key Performance & Safety Features

  • High-Resolution 26X Magnification Lens: Large optical objective lens projects sharp reticle crosshairs across long-distance surveying runs.
  • Magnetically Dampened Wire-Hung Compensator: Internal self-leveling system stabilizes the line of sight against jobsite vibrations caused by heavy machinery.
  • Automatic Compensator Transport Lock: Internal mechanical lock secures the delicate pendulum mechanism when the tool is stored to prevent transit damage.
  • 90-Degree Penta Prism Bubble Viewfinder: Reflects the circular bubble vial image to eye level for fast leveling without shifting posture.
  • Top-Mounted Quick Sight Peep Finder: Directs rapid optical alignment toward distant grade rods before fine-tuning focus.
  • Continuous Friction Horizontal Drive Knobs: Fine-pitch lateral drive screws allow precise reticle targeting on the leveling rod.

What's Included

  • (1) Bosch GOL 26 Automatic Optical Level
  • (1) Heavy-Duty Aluminum Tripod Assembly
  • (1) Sectional Aluminum Grade Rod
  • (1) Precision Plumb Bob
  • (1) Adjustment Tool Kit
  • (1) Protective Lens Cover Cap
  • (1) Hard Protective Storage Case

Technical Specifications

Brand / Manufacturer Bosch
Model / Part Number GOL 26 CK
Optical Telescope Magnification 26X
Leveling Accuracy Tolerance ±1/16 in. at 100 ft (1.6 mm at 30 m)
Maximum Working Range Distance Up to 330 ft (100 m)
Compensator Mechanism Type Magnetically Dampened Wire-Hung Pendulum
Compensator Leveling Range ±15 Arc Minutes
Tripod Mounting Thread Size 5/8 in. - 11 UNC Thread
Overall Optical Tool Length 5-3/5 in. (142 mm / 5.6 in.)
Water & Dust Ingress Rating IP54 Environmental Protection Rating
Factory Warranty Coverage 2-Year Limited Manufacturer Warranty
Pro-Tip: Always check that the circular bubble vial is centered inside the penta prism before taking rod measurements; leveling the base screws first ensures the internal magnetic compensator stays balanced across long distance sighting runs.