Our Spectra Precision GL422N rechargeable dual-grade laser provides automatic horizontal and vertical self-levelling, with digital grade adjustment from −10% to +15% on both axes. Supplied with an HL760 digital readout receiver and RC402N radio remote, it supports automatic Grade Match and PlaneLok. The kit includes rechargeable NiMH batteries, a charger, receiver adapters and a carrying case.
Our Spectra Precision GL422N combines automatic horizontal and vertical self-levelling with digital grade control on two axes. It provides references for checking elevations, setting surface falls and aligning construction work, with an HL760 digital readout receiver and RC402N radio remote supplied.
This Spectra dual slope laser allows you to enter separate X- and Y-axis gradients for work requiring falls in two directions. Compare the GL422N with our other grade laser levels when selecting the grade range and control functions for your site.
The GL422N laser provides a grade range of −10% to +15% on each axis. You can enter the required gradient through the menu and confirm the setting before the instrument levels to that slope.
Key specifications include:
Horizontal operation supports elevation checks and grade work, while vertical operation provides a reference for alignment. The menu gives access to the functions available for the selected setup.
The HL760 displays numerical differences from the on-grade position, helping you see how far the receiver is above or below the laser reference. Attach it to a suitable levelling staff when comparing elevations across the working area.
Automatic Grade Match measures an existing slope between two reference points on the Y-axis. The resulting grade appears on the laser and remote displays, supporting work where you need to match an existing gradient.
PlaneLok maintains the beam at a fixed receiver position to help hold horizontal elevation or vertical alignment. The receiver stays secured at the reference point while this function is active.
Fingerprinting helps the paired HL760 recognise your instrument’s beam and reject signals from other lasers. Mask mode lets you switch off selected beam sectors to limit interference with neighbouring crews.
The RC402N controls the laser functions from up to 100m and mirrors the instrument’s display. This lets you adjust grades and check settings from your working position.
The rechargeable NiMH batteries provide approximately 35 hours of operation. Four D-cell alkaline batteries can be used as backup power. Alongside the laser, HL760 and RC402N, the package includes a C70 receiver adapter, 105516 vertical receiver adapter, charger, carrying case and user documentation.
If smartphone control would suit your setup, compare our Spectra Precision GL1425C dual grade laser, which includes Bluetooth connectivity and a dedicated Laser Remote App.
Order your Spectra Precision GL422N with HL760 receiver online, or call us on 01 801 1335 for advice on grade settings, receiver functions and compatible accessories.