Spectra GL612N-NR Single Slope Grade Laser w/HL760 Receiver


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In stock

The Spectra GL612N is a rugged, automatic self-leveling laser with a working range of up to 2,600 feet. Used in a wide variety of grading, excavating and alignment applications, this construction rotary laser features PlaneLok and Grade Matching for increased accuracy in slope measurement. Featuring single grade capability of ±25%, the GL612N grade laser self-plumbs in the vertical position to allow bolt installation, form, tilt-up, and curtain wall plumbing. It also delivers a self-leveling accuracy of ±1/16th inch, making it ideal for agricultural and construction applications.

Allowing the use of multiple lasers on-site, the GL612N features a mask mode that eliminates interference with other crews. Electronic leveling vibration filter reduces vibrations typically experienced on tall tripods, in high winds or on high vibration job sites. Incorporating automatic temperature and grade compensation, this Spectra Precision laser level delivers highly accurate results in any weather or geographical location. This slope laser also comes with the Spectra HL760 laser receiver which provides a digital readout of elevation and features an anti-strobe detector that prevents false readings from site strobe lights.

With an IP67 rating, the GL612N laser level is protected against dust and water immersion and can even survive a drop of up to three feet on concrete! It features an intuitive keypad and a graphic display. In addition, contractors can mount this single grade laser vertically or horizontally on a 5/8-11 tripod. The Spectra GL612N works up to 35 hours using rechargeable NiMH batteries and approximately 40 hours using alkaline batteries.

SKU: GL612N-NR Category: Tag:


  • (1) GL612N Grade Laser
  • (1) HL760 Laser Receiver
  • (1) Q104667 Rechargeable NiMH Pack, 10 Ah
  • (1) Worldwide Battery Charger
  • (1) Rod Clamp
  • (1) Carrying Case


  • Leveling concrete forms, footers and Pads
  • Precision placement of concrete for critical specification surfaces over long distance and with laser controlled screeds (Automatic PlaneLok)
  • Drift free general construction vertical allignment and plumb for plus form, tilt up and curtain wall plumbing (Automatic PlaneLok)
  • General construction vertical alignment and plumb such as anchor bolt and form alignment
  • “Over the top” sewer and storm drain pipe installations
  • Sports fields, driveways, ramps and drainage
  • General construction grading and excavating
  • Steep slope road embankments and ditch banks


  • Up to 2,600 feet operating range with laser receiver
  • ±1/16 inch accuracy at 100 feet
  • Self-leveling within ±14 degrees
  • Single grade to ±25 %
  • Included laser receiver
  • Grade matching measures and displays the existing grade
  • PlaneLok automatically locks on the laser beam
  • Mask mode for using multiple lasers on site
  • Electronic leveling vibration filter
  • Automatic temperature compensation
  • Radio remote control
  • Ideal for machine control applications
  • 5/8-11 tripod thread
  • 40-hour battery life
  • Water resistant and dustproof to IP67
  • Withstands a 3 feet drop onto concrete
  • Graphic LCD display and keypad


Spectra Precision GL612N Single Grade Laser SPECIFICATIONS
  • Leveling accuracy1,3: ± 0.5 mm/10 m,
    • 1/16“ @ 100 ft, 10 arc seconds
  • Grade accuracy1,3: ± 1.0 mm/10 m,
    • 1/8“ @ 100 ft, 20 arc seconds
  • Operating diameter1,2: approximately (2600 feet) with detector
  • Grade range (Y, X-GL622N): ± 25% both axes (not simultaneously)
  • Rotation: 300, 600, 750 rpm
  • Laser type: 639 nm
  • Laser class : Class 2
  • Self-leveling range: approximately ± 14°
  • Leveling indicators: LCD indications and LED flashes
  • Radio range (HL760)1,2,4: up to 490 feet
  • Power source: NiMH battery pack
  • Battery life1 : 35 hours NiMH
  • Operating temp.: -4°F to 122°F
  • Storage temp.: -4°F to 158°F
  • Tripod attachments: 5/8 x 11 horizontally and vertically
  • Dust and waterproof: Yes – IP67
  • Weight: 6.8 lbs
  • Low voltage indication: LCD battery indicator
  • Low voltage disconnection: unit shuts off
  • Warranty: 5 Years
  Spectra HL760 Laser Receiver FEATURES and SPECIFICATIONS
  • Highly versatile receiver for basic and advanced leveling and aligning application
  • Works with GL612N/GL622N in automatic Axis Alignment (only GL622N), Grade Match and PlaneLok applications
  • Key Features:
    • Digital readout of elevation
    • Exact distance from grade displayed
    • Anti-strobe sensor to prevent false reading from jobsite strobe lights
  • Large reception height to ease beam reception
  • Withstands a drop of up to 10 foot
  • Radio communication – works with another HL760 for long range wireless remote display and monitoring capability
  • “Fingerprint” function of the HL760 DRO receiver only accepts the beam from the laser it is paired with
  • User Benefits
    1. No need to go “on-grade” to measure
      • (1) at 21° Celsius (70° F)
        (2) under optimal atmospheric circumstances
        (3) along the axis
        (4) Heigt of instruments 1m (e.g. with tripod)
    • Saves considerable time
    • Reduces rework by allowing remote monitoring
    • Increases reliability, accuracy and durability

Spectra HL760 Laserometer Laser Receiver SPECIFICATIONS

  • Digital readout units: mm, cm, feet, inches, fractional inch
  • Reception height: 127 mm (5 inches)
  • Six On-grade sensitivities:
    • Ultra Fine 0.5 mm (~1/32 in)
    • Super Fine 1 mm (~1/16 in)
    • Fine 2 mm (~1/8 in)
    • Medium 5 mm (~1/4 in)
    • Coarse 10 mm (~1/2 in)
    • Calibration Mode 0.1 mm (~1/64 in)
  • Battery life (2 x AA): 60+ hours continuous operation
  • Auto shut-off: 30 minutes/24 hours
  • Operating temp.: -20°C to 50°C (-4°F to 122°F)
  • Dust and waterproof: Yes – IP67
  • Weight: 0.27 kg (9.5 oz)
  • Warranty: 3 Years “No Excuses”

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