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Spectra GL720 Dual Grade Laser

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  • 3,000 foot operating range

  • Self-leveling

  • Dual grade to ±10% horizontal and -0.5 to +25% vertical

  • Choice of receiver and battery

  • Automatic temperature compensation 

  • Fully sealed aluminum housing

  • Large alphanumeric display

  • 5/8-11 tripod thread

Availability: In stock


Overview for the Spectra GL720 Dual Grade Laser

The Spectra GL720 is an automatic, self-leveling construction grade laser with dual grade capability. With a working range of up to 3,000 feet, it includes a HL700 laser receiver for digital readout of elevation and NiCad batteries for long-lasting performance in the field.

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. You can mount this device on a 5/8-11 tripod.

Spectra HL700 Laser Detector

The included HL700 Laserometer provides digital readout of elevation that shows exactly how far you are from on-grade and allowing quick elevation checks without moving the rod clamp. This laser receiver has highly visible LED display and features an anti-strobe sensor that stops construction lights from setting off the receiver and makes it easier to identify true laser beam signals. The readout is displayed on dual sided LCDs and selectable units of measure are displayed in millimeter, centimeter, feet, inches or fractional inches.

With a large five-inch reception height, the handheld or rod mounted Spectra HL700 laser detector has a capture function that remotely captures and retains a measurement when the display is difficult to see. Excavation mode puts more reception height and elevation information above grade for higher utilization in digging and staking applications.

Extra Features

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 foot tripods.

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

This Spectra grade laser package comes with a HL700 laser receiver, hard carrying case, NiCad rechargeable batteries, charger, power cable and a 2-year manufacturer’s warranty.

Features for the Spectra GL720 Dual Grade Laser

  • 3,000 feet operating range
  • Self-leveling
  • Dual grade to ±10% horizontal and –0.5 to +25% vertical
  • HL700 laser receiver
  • Automatic temperature compensation 
  • Selectable rotation speeds
  • Ideal for machine control
  • NiCad rechargeable batteries
  • Fully sealed aluminum housing
  • Protective lens hood
  • Large alphanumeric display
  • 5/8-11 tripod thread
  • Unmatched beam stability
  • Intuitive, simple controls

Specifications for the Spectra GL720 Dual Grade Laser

Color Red
Classification Class 2
Visibility Visible
Exterior 3,000 ft (914 m)
Power Source NiCad or NiMH batteries
Battery Life Alert yes
Automatic Shut-Off yes
Display Large, alphanumeric
Tripod Adapter (Center Screw Thread) 5/8-11 horizontal and vertical
Adjustable Rotating Speed 300, 600, 900 rpm
Weight 18.8 lbs (8.5 kg)
Dimensions 11.75 x 10.0 x 7.75 in (29.8 x 25.4 x 19.7 cm)
Warranty 2-year
Extra Technology
Detector/Reciever HL700/CR600
Horizontal 1/16” per 100 ft (1.5 mm per 30 m)
Grade Operation Automatic
Automatic Leveling yes
Checking/Setting Elevations yes
Transferring Points from Floor to Ceiling yes
Machine Control of Excavators, Graders, Dozers or Similar Equipment yes
Installation of Interior Fittings (cabinets, lighting, windows, countertops, etc.) yes
Short-Range Leveling for Decks, Patios & Swimming Pools yes
Installation/Leveling Interior Walls yes
Installation/Leveling Ceiling Grids yes
Squaring and Layout of Partitions, Walls & Tile Floors yes
Concrete Forms, Footings and Foundations yes
Plumb Reference yes
Checking Elevations of Sub-Base and Sub-Grade yes
Short-Run Vertical Alignment yes
Checking Building Square & Area yes
Estimating Cut & Fill yes
Locating Finished Floor Levels yes
Type Dual
Percentage ±10% in X axis; -0.5 to +25% in Y axis
Accuracy 1/8” per 100 ft. (3.0 mm per 30 m)

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