Spectra CTO-GL720-10 Dual Grade Laser w/CR600 Receiver


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The Spectra GL720 is an automatic, self-leveling construction grade laser with dual grade capability. Featuring +/-10% grade range in the X axis and -0.5 to +25% in the Y axis, the GL720 laser level is ideal for general construction and automatic machine control applications. This grade laser has a working range of up to 3,000 feet and can be mounted on a 5/8-11 tripod.

Active temperature compensation gives accurate, stable results regardless of temperature changes. In addition, the Spectra Precision GL720’s large alphanumeric display is visible from the ground even on ten feet tripods.

With weather-resistant control panel and built-in non-slip carrying handle, the GL720 allows you to work in all weather conditions. This grade slope laser uses NiMH batteries and offers flexible power options, battery life indicator, and wirelessly operated sleep mode that saves power during breaks.

The Spectra CR600 is a handheld and rod-mounted laser receiver that can also be used for machine control. It has 270-degree reception and a highly visible display for use on a backhoe, small excavator or skid steer. Rugged, accurate and easy to use, the CR600 provides high, low or on-grade information for all your grading and excavation applications. With 15-channel linear display and receiver cells with continuous pickup, it provides less dead spot and does not require you to be on-grade to measure.

SKU: CTO-GL720-10 Category: Tag:


  • GL720 Dual Grade Laser
  • CR600 Laser Receiver
  • C50 & C51 adaptors for clamping laser receiver grade rod
  • Charger 1445-2092 w/ Cable 6003-0820
  • 6 x D-Cell NiMH Batteries Q103077
  • Carrying Case
  • Operating Manual


  • General construction
  • Site preparation
  • Trenching
  • Pipe laying
  • Road construction
  • Machine control
    • Setting and Checking Elevations
    • Basement Excavations
    • Digging Septic Tanks
    • Checking Foundations
    • Digging Footings
    • Leveling and Setting Forms
    • Checking sub-base materials
    • Screeding concrete


  • Up to 3,000-foot operating range
  • ±1/16 inch accuracy at 100 feet
  • Self-leveling
  • Dual grade to ±10% horizontal and -0.5 to +25% vertical
  • Automatic temperature compensation
  • Selectable rotation speeds
  • Ideal for machine control
  • Fully sealed aluminum housing
  • Protective lens hood
  • Large alphanumeric display
  • 5/8-11 tripod thread
  • Unmatched beam stability
  • Intuitive, simple controls


Servo Deadband Accuracy4.6 arc seconds4.6 arc seconds4.6 arc seconds
Operating Diameter3,000 feet3,000 feet3,000 feet
Axis Grade Range XNA-10 to +10%-10 to +10%
Axis Grade Y-0.5% to +25%-0.5% to +25%-0.5% to +25%
Grade Resolution0.001%0.001%0.001%
Slope TypeSingleDualDual
Power SourceNiMH (6-D Cell)NiMH (6-D Cell)NiMH (6-D Cell)
Battery Life30 hours30 hours30 hours
Rotation Speeds300, 600, 900 rpm300, 600, 900 rpm300, 600, 900 rpm
Radio Remote ControlNoNoYes
Auto Axis AlignmentNoNoYes
Grade Match ModeNoNoYes
Water ResistanceCompletely Sealed and Waterproof
Size L x W x H (inches)7.75 x 10 x 11.75
Weight (lbs)18

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