Spectra Precision AL24A Automatic Level

Data Sheet

The Spectra Precision AL24A is a high-accuracy, 24x magnification auto level engineered for construction and engineering professionals who demand consistent precision. Equipped with an air dampened compensator, the AL24A delivers superior stability and accuracy in conditions where vibration is minimal but exact measurement is critical—such as large-scale grading, surveying, or site layout.

With a standard deviation of 2.0 mm per 1 km of double-run leveling, the AL24A provides sharp, clear images through its erect image optical system and wide 30 mm objective aperture, ensuring excellent visibility in all lighting conditions. The durable housing protects the optics in rugged environments, and its short minimum focusing distance of just 0.60 m (1.97 ft.) allows for close-range work around structures and foundations.

Key Specifications:

• Magnification: 24x
• Accuracy: 2.0 mm per kilometer double-run
• Dampening Type: Air
• Field of View: 120′
• Minimum Focus Distance: 0.60 m (1.97 ft.)
• Objective Aperture: 30 mm
• Dimensions: 215 × 103 × 135 mm
• Weight: 1.85 kg (4.1 lbs)

What’s Included in Each Package

AL24A Standard Unit

• AL24A Automatic Level (Air Dampened)
• Plumb Bob
• Adjustment Tools
• Rain Hood
• Hard Carrying Case

AL24A-1 Tenths Package

• AL24A Automatic Level
• Plumb Bob
• Adjustment Tools
• Rain Hood
• GR151 Aluminum Grade Rod (Tenths)
• 5301-27-BLK-SP Heavy-Duty Tripod
• Hard Carrying Case

AL24A-2 Eighths Package

• AL24A Automatic Level
• Plumb Bob
• Adjustment Tools
• Rain Hood
• GR152 Aluminum Grade Rod (8ths)
• 5301-27-BLK-SP Heavy-Duty Tripod
• Hard Carrying Case

Magnetic vs. Air Dampened Auto Levels

The AL24A uses an air-damped compensator, making it ideal for tasks where maximum accuracy and sensitivity are required in stable environments. Air dampening reacts quickly and smoothly, delivering tighter leveling precision over long distances—perfect for surveying, engineering layout, or slope work.

By contrast, magnetic dampened modelsoffer better vibration resistance and are suited for active construction zones where heavy machinery or movement might otherwise disrupt readings. Choose air dampening for tighter tolerances, and magnetic for tougher jobsite conditions.