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Spectra GL422N Extreme Kit


Fully Self Levelling Dual Grade Rotary Laser Level Kit, including HL700 Laser Detector & Radio Remote Control. Also includes FREE Surveying Tripod & 2.4m Measuring Staff.

Model: GL422N


Was: £1,824.00

Sale Price: £1,599.00 Incl. VAT: £1,918.80
(Delivery may be extra depending on location)

Rating: 4.65 out of 5 stars

Availability: In Stock In Stock
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Product overview:

Spectra GL422N Extreme Laser Level Kit:

Long Range, High Accuracy, Dual Grade Laser level.


Spectra Precision GL422N is a high performance grade laser with two way full function remote control and superior grade, level and vertical plane capabilities. The required grade for each axis is entered via the keypad on the instrument or RC402N remote control, and is displayed on the LCD panel.


The GL422N Grade Laser can also self-plumb in the vertical plane, for applications such as anchor bolt installation and curtain walling.

To avoid interference with any other laser crews on site, or for safety reasons, the laser beam can be electronically blanked out on up to any three sides of the instrument.


The Spectra GL422N can be used with any Spectra Precision laser detector. It is particularly suited for use with the larger machine mounted laser detectors for digging or grading operations, whereby the driver can check the grade without leaving the cab.


The GL422N laser level can be used with a number of Spectra detectors for various applications. Detector choices for the GL422N include the standard HL700 detector where direct read and anti-strobe is required and the HL760U, for advanced applications (as described below).


The specialist Spectra HL760U detector offers Automatic Grade Match and vertical PlaneLok:


Automatic Grade Matching.  A very useful feature for drainage work. You will need both the optional HL760U detector and the optional RC402N remote control.

The remote control menu is used to access the Auto Grade Matching feature and to signal the laser level to scan up or down (in its Y-axis) to find the HL760U detector at its set height. A radio link between the two, enables the laser to be set to the required slope. This is much faster and more accurate than trying to manually set the laser to the required slope.


The PlaneLok function. You will need both the optional HL760U detector and the optional RC402N remote control.

This feature is used to lock the laser beam in alignment with the target point - especially useful for general alignment and vertical cladding applications etc.


A unique “Fingerprint” function of the HL760U only accepts the beam from the laser it is paired with.


  • Ideal for grading and excavating
  • Use for long range levelling operations, up to 800m diameter
  • High horizontal levelling accuracy of +/- 1.5mm per 30m
  • Suitable for general construction vertical alignment
  • Set levels for concrete aprons and roadways
  • Manual grading of steep slopes for embankments
  • Five Year Warranty


Fast setup, minimal training time and automatic self-levelling minimize operating costs and boost productivity.
Highly rugged design and unique patent-pending lighthouse seal protects the transmitter head and glass, offering superior drop and weather protection for reduced downtime.
One-person operation reduces labour costs.
High accuracy:  1.5 mm at 30 metres, for precise measurements on the job.
Temperature-calibrated, high accuracy for consistent performance across larger jobsites.
IP66 dust and waterproof for continual performance in harsh conditions.
Withstands a direct drop of 1 metre or a 1.5 metres tripod tip-over onto concrete.
Ability to be used up to 800 m diameter with a detector, makes the unit ideal for small to large projects.
Single-axis slope mode offers fast set-up and grade match to a reference mark for permanent and accurate ceiling slope reference.
Energy-efficient design offers choice of rechargeable or alkaline batteries for lower operating costs.
Long-range, radio remote control gives you quick access to all the laser functions, without needing to return to the laser instrument.
Customizable to your needs with the choice of two Spectra detectors. 


Laser Source: 650 nm visible, Class 2, red beam
Laser High Accuracy: ±1.5 mm @ 30 metres
Operating Range (Diameter) with HL700 detector: 800m
Self-Leveling Range: ±5 degrees
Compensation Method: Electronic self-leveling
Drop Height on Concrete performance: 1m
Grading range: -10% to +15%

Grade resolution: 0.001% up to 9.999%
Out of Level (HI) Warning: Yes
Power Source: 10,000mAH high capacity rechargeable battery pack or alkaline batteries
Battery Life: 35 hours (rechargeable)
Rotation Speed: selectable 300 or 600 rpm
Tripod Mount (Horizontal and Vertical): 5/8” x 11
Operating Temperature: -20 to 50°C
Storage Temperature: -20 to +70°C
Water Resistant: Yes, to IP66 protection level
Size: 21 x 18 x 20cm
Weight: 3.1 kg
Warranty: Full 5 years parts & labour

Detector features:

Choosing the right detector ensures maximum performance from the GL422N. The standard kit has an HL700 or for machine control applications, see the magnetic machine control detector, model CR600.


Standard kit with HL700 Detector & Bracket:

Main Features

Digital readout of elevation - not only will high or low arrows be displayed, but the exact distance from grade will be numerically displayed (+/-50mm to a 0.5mm resolution), which eliminates the need to get "on-grade" to make measurements.

Large 127mm reception height acquires the beam quickly and makes it easy to stay in the beam.Anti-strobe sensor stops construction strobe lights from setting off the receiver, and makes it easier to identify true laser beam signals.

Simultaneous elevation LED's signal in low light levels and over a longer range for easier reading in poor light conditions.

A new CAPTURE function remotely captures and retains a measurement when the display is difficult to see.

Multiple deadband sensitivity settings, five in all, allows adaptation to meet all your jobsite requirements.

Dust and weatherproof housing withstands a drop of up to 3 m (10 ft) onto concrete for reduced downtime.

Two clamp positions for cut/fill or excavation. Excavation mode puts more reception height and elevation information above grade for higher utilization in digging and staking applications.


Technical specification:

+/- 1.5mm @ 30 metres, max. operating diameter 800m
+/- 5 degrees self levelling range

Example usage:

Slopes on grade
Levelling forms and footers
Screeding concrete
Driveways and ramps
Machine control
Cut & Fill 

If you need?:

Spectra 5 Year - No Cost - WARRANTY

This laser is covered by a new "5-Year - No Cost" Warranty which covers all defects due to material and workmanship. Spectra Precision Laser products with this warranty that have failed will be repaired FREE OF CHARGE for five years from the date of purchase.

Also included in the kit:

The Spectra Precision GL422N Kit also includes the following:

FREE Telescopic Levelling Staff (Model: TLS3)

(Colours / Brand may vary)

2.4m, 3-section, Telescopic Levelling Staff. 
Three robust aluminium sections (3 x 3ft) with abrasion proof scale. 
Height 950mm closed length to extended max. height 2440mm.
Automatic locking buttons when extended.
Provision for rear bubble level.
E-graduations (1cm) / Markings on front and mm scale on back. 
Red / Black coded sections. 
Accepts Laser Detector mounting bracket.
Height: 0.95m closed length to extended max 2.4m. 
Weight 0.95kg. 


FREE Spectra Precision Surveying Tripod (Model: Q104025)

(Colours may vary)

Rigid aluminium tripod. 
Extending legs with clamp locking adjustment. 
Spiked feet. 
Flat top, mounting head. 
Shoulder carry strap. 
Head size 110mm
5/8 inch x 11 thread. 
Closed length 0.870m
Max. Opened height 1.39m approx.
Tripod weight: 3.15kg
Carton size: 19 x 20 x 91(L) cm


Calibration and servicing:

We check and calibrate all Lasers prior to dispatch, to ensure they meet or exceed the manufacturers published specifications at the time of shipment from the factory.
If you routinely work on large job sites, which require you to have a physical Calibration certificate, issued in your name and matched to the Laser via its serial number, you must ensure you tick the above box marked "Paper Certificate" (where applicable) to add a Calibration certificate to your order. The Certificate will then be generated and included with your Laser. Please note the issuing of a Calibration certificate DOES NOT delay or hold up the despatch of your Laser in any way.

Kit comprises of:

Spectra GL422N Rotary Grade Laser Level

Spectra HL700 Laser Detector with mounting bracket & batteries (Option to upgrade to HL760U Laser Detector)

Spectra RC402N Radio Remote control & batteries

Rechargeable Battery pack (high capacity) & Mains Charger

Robust carry case

Instructions / Safety Manual

Full 5 years Warranty

FREE Surveying Tripod

FREE TLS3 2.4m Measuring Staff

Key information:

Model GL422N
Brand Spectra Precision
Type Rotary Laser
Laser beam Dot
Laser colour Red Beam
Beam axis Horizontal only
Levelling Fully Self Levelling
Usage Outdoor
Facilities Scan
Slope setting Dual grade
Mounting thread 5/8 inch
Power source Both types (Rechargeable & Non-Rechargeable)
Laser output Class 2
IP rating IP66 (Dust tight / Protected against powerful jets of water)
Warranty Full 5 Year Parts & Labour Warranty

Frequently bought together:

Customers who bought this product also commonly purchased the following combination of items.

This Item: Spectra GL422N Extreme Kit

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Price for all: £1873 Excl. VAT.

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