Spectra Precision GL412N Single-Grade Rotary Laser Kit with HL760 Receiver, RC1402 Remote, Rechargeable Batteries & Compact Carrying Case

Q: What is the Spectra GL412N?

A self-leveling single grade laser that does three jobs: level, grade on one axis, and vertical alignment, read with a receiver such as the HL760 in this package.

Q: What is the difference between the GL412N and the GL422N?

Same laser, same accuracy and range. The GL412N takes an entered grade on one axis (Y); the GL422N takes a grade on both X and Y. If you only ever slope one direction, such as a pipe run, a driveway or a single-fall slab, the GL412N does the job.

Q: Can I enter a slope percentage, like 2%?

Yes. The GL412N is an automatic single grade laser: you type the grade into the Y axis on the keypad or the RC1402 remote, from -10% to +15%, and it self-levels to it. You do not have to tilt it by hand.

Q: How accurate is it?

Leveling accuracy is ±1.5 mm at 30 m (1/16 in at 100 ft); grade accuracy is ±3.0 mm at 30 m (1/8 in at 100 ft), per the Spectra GL412N/GL422N user guide.

Q: How far does it work?

Up to 2,600 ft working diameter (about 1,300 ft from the laser) with a receiver, so one setup covers a large job site.

Q: How much grade can it run?

From -10% to +15% on the Y axis. It self-levels within ±5° (±9%); for grades past 9% you pre-tilt the laser.

Q: Is it Spectra’s package or a Contractors-Tools.com kit?

The GL412N is Spectra’s core package: laser, HL760 receiver with C70 clamp, 105516 vertical adapter, RC1402 remote, rechargeable batteries and the small case. Every other GL412N part number on our site is a kit we build around the same laser. We customize kits so you get what you need to complete the job.

Q: How long does the battery last? What if I forget to charge it?

The rechargeable NiMH pack runs typically 35 hours and charges in about 13 hours. It also runs on 4 D-cell alkaline batteries (not included, about 50 hours), and indoors the charger can power the laser, so a missed charge does not end your day.

Q: How tough is it?

IP66 dust and water protected, with a metal sunshade, and built to survive drops of up to 3 ft onto concrete and tripod tip-overs up to 5 ft. Check accuracy after any drop.

Q: What is the warranty?

5 years on the GL412N laser for materials and workmanship (calibration is not covered) and 3 years “No Excuses” on the HL760 receiver.

Spectra Precision
Single Grade Laser

GL412N

Spectra GL412N Single Slope Grade Laser

Horizontal / Vertical Red Beam Laser - Rechargeable Batteries
GL412N with HL760 Laserometer Receiver and RC1402 Remote

Dial a grade into the Y axis from -10% to +15%, read it to the fraction on the HL760, and change it from the RC1402 remote. Accurate to 1/16″ at 100 ft across a 2,600 ft working diameter.

Questions? Talk to someone who uses these: 1-877-866-5721

±1/16″

At 100 ft

2,600 ft

Working diameter

Single

Grade on Y axis

-10% to +15%

Grade range

IP66

Dust & water

35 hrs

NiMH runtime

300/600

Rotation rpm

5 years

Laser warranty

Drainage that actually drains

Type the grade into the Y axis and the laser self-levels to it. No distance-versus-height math at the stake.

Match the grade that is already there

Grade Match measures the slope between two points with the HL760, up to 330 ft away, so tie-ins come out right.

Built for the jobsite it lives on

Survives a 3 ft drop onto concrete and a 5 ft tripod tip-over, sealed to IP66.

The pairing

The laser sets the grade. The HL760 reads it.

GL412N

It puts the grade up.

Single grade. Enter a grade on the Y axis from -10% to +15%; it self-levels to it and holds the other axis level.
1/16″ at 100 ft level, 1/8″ at 100 ft on grade. 300 / 600 rpm.
Self-levels within ±5° (±9%); grades past 9% need the laser pre-tilted.
The RC1402 radio remote runs every keypad function from up to 330 ft.
HI alert: bump the tripod and it stops and warns you, instead of letting you work off a bad setup.
A 3 ft drop onto concrete, a 5 ft tripod tip-over, sealed to IP66.

HL760

It tells you the number.

A 5″ reception height with a digital readout: the exact distance from on-grade, not just a beep.
Reads in mm, cm, feet, inches or fractional inches.
Ships with its C70 rod clamp and the 105516 vertical adapter.
Two-way radio with the laser. That is what makes Grade Match and PlaneLok possible.

What the two of them do that neither does alone

Grade Match measures an existing grade between two points, up to 330 ft out on the Y axis, and shows it on the laser and the remote. PlaneLok locks the beam onto the receiver at a fixed point so temperature and weather cannot move your elevation. Both need the laser and the receiver talking over radio, and the HL760 in this package is the receiver that does it.

What you get

Laser, receiver and remote

Laser

The GL412N single grade laser with its rechargeable NiMH pack and charger.

Receiver

The HL760 digital readout receiver with its C70 clamp and the 105516 vertical adapter.

Control

The RC1402 two-way radio remote.

Everything in the small carrying case.

The technical edge

Grade you never have to calculate

Single grade

Type a grade into the Y axis; the laser self-levels to it.

Grade Match

Measures the slope that is already there between two points.

PlaneLok

Locks the beam onto a fixed receiver so drift cannot creep in.

Less math at the stake, fewer re-shoots.

What sets it apart

It protects the job, not just the grade

HI alert

Knock the tripod and the rotor stops and the beam goes off, so nobody digs to a bad number.

Mask mode

Switch the beam off in up to 3 windows so it does not trip other crews’ receivers.

Set it up once and trust it all day.

Free Same-Day Shipping · Order by noon central and it ships today.
Call 1-877-866-5721 for express and next-day options. · Five year laser warranty

Spectra Precision GL412N single grade laser on a tripod at an excavation site with a CAT 320C excavator working behind it — **On the job.** The GL412N on its tripod, setting grade for the excavator working behind it.

Overview

One Laser. Level, Grade and Plumb.

The automatic, self-leveling Spectra Precision® GL412N single grade laser is the most rugged, cost-effective laser that does three jobs—level, grade, and vertical alignment. Even in harsh jobsite conditions, the GL412N delivers consistently reliable and accurate performance, enabling you to work faster and smarter.

The rugged GL412N lasers can withstand drops of up to three feet onto concrete and tripod tipovers up to five feet. This strength, combined with full weatherproofing and dustproofing, reduces downtime and lowers repair costs over the life of the product.

The GL412N laser system now includes the advanced HL760 Digital Readout (DRO) receiver that provides automatic Grade Match, PlaneLok and Fingerprint function.

Grade Match

measures and displays the existing grade over unknown ground. As a consequence it eliminates time consuming and error prone calculations

PlaneLok

automatically locks on to an existing horizontal elevation or vertical alignment point which eliminates all drift or possibility of error due to improper calibration or weather.

The unique “Fingerprint” function

only accepts the beam from the laser it is paired with.

What’s in the Box

What You Receive.

Spectra Precision GL412N Single Grade Laser Package INCLUDES

GL412N Single Grade Laser Transmitter

Single grade on the Y axis, level and vertical. 1/16 in at 100 ft, 300/600 rpm, IP66.

HL760 Deluxe Receiver

LARGE 5-inch Reception Height. A digital readout of how far off grade you are, and the two-way radio for Grade Match and PlaneLok.

C70 Receiver Grade Rod Clamp

Clamps the HL760 to your grade rod.

105516 Vertical Adapter for HL Receiver

Holds the HL760 for vertical PlaneLok and layout work.

RC1402 Remote Control

Two-way radio remote. Every keypad function from up to 330 ft, on 2 AA batteries.

Rechargeable Batteries

10,000 mAh NiMH pack, typically 35 hours, with its charger. Takes 4 D-cell alkalines as a backup.

Small Carrying Case

Molded case for the laser, receiver and remote.

Quick user guide and Safety Instructions

The full 2024 user guide is downloadable from our website, under Downloads below.

5-Year Warranty

On the GL412N laser, materials and workmanship. Calibration is the owner’s job.

GL412N

This is Spectra’s own GL412N package. Every other GL412N part number on our site is a kit we build around this same laser. We customize kits so you get what you need to complete the job. See every GL412N kit ↓

Why this package and not a cheaper one

The receiver is what unlocks Grade Match and PlaneLok.

Our laser-only GL412N-BL and GL412N-BCC kits cost less because there is no receiver and no remote in the box. But Grade Match and PlaneLok only work when the laser and the receiver talk to each other over radio, and that takes an HL760. This package already has the HL760 and the RC1402 remote. Buy this one and every feature on this page works on day one.

Working off a machine, not just a rod?

Our GL412N-14 kit is the same laser and remote with the CR700 machine and rod receiver and the C71 magnetic mount in place of the HL760, so the receiver goes on the rod or on the machine.

$2,526.00

See the GL412N-14 →

Key Features

Built to Do Three Jobs Well.

Spectra GL412N Key FEATURES and BENEFITS

Single grade

GL412N is single grade plus horizontal and vertical. Simple, accurate dial in grade from -10% to +15%

Range

Up to 2,600 ft working diameter which increases productivity by reducing need for multiple set-ups on a large job site

Self-leveling

Fully automatic self-leveling in both axes, horizontal, and vertical which provides fast, accurate setup in all applications

Fast setup

Fast setup, minimal training time and automatic self-leveling minimize operating costs and boost productivity

Rugged

Highly rugged design and patented lighthouse seal protects the rotor head and glass and offers superior drop and weather protection for reduced downtime

Remote

2-way full function remote control allows grade changes to be made from anywhere on the jobsite

Temperature

Temperature calibrated for high accuracy over wide temperature changes

IP66

IP66 dust and water-proof to withstand harsh jobsite conditions

Your choice of receiver

Customizable with choice of HL760 or CR700 receivers

Mask mode

Mask mode eliminates interference from other crews on the jobsite

Grade Match + PlaneLok

Automatic Grade Match and PlaneLok

Spectra Precision GL412N single grade laser on a tripod beside an excavator digging a trench — **Set it beside the cut.** One setup covers a 2,600 ft working diameter, so the laser stays put while the machine moves.

Applications

Where This Laser Earns Its Keep.

Spectra GL412N APPLICATIONS

Leveling concrete forms and footers

Forms and footings set off one plane, all day.

General construction vertical alignment and plumb such as anchor bolt and form alignment

Lay it on its side for plumb lines on anchor bolts and forms.

“Over the top” sewer and storm drain pipe installations

Set the pipe grade into the Y axis and read it from above the trench.

Sports fields, tennis courts and driveways

Fall set on one axis for drainage on courts, fields and drives.

Grading and excavating

Cut and fill read off the rod as a number.

Steep slope road embankments and ditch banks

Grades past 9% with the laser pre-tilted, up to +15%.

Ramps and drainage

One grade, held all day.

Spectra Precision GL412N single grade laser on a tripod on a pipe-laying job, Hitachi excavator and stacked pipe behind it — **Pipe and storm drain.** Dial the pipe grade into the Y axis and the excavator works to it.

Worker checking grade with a receiver on a grade rod in an excavation, excavator in the distance — **Check it on the rod.** The receiver on the grade rod tells the crew how far off grade they are.

Applications from our GL412N listing and Spectra’s GL412N/GL422N datasheet.

VIDEO

See It On the Job.

Our GL412N overview and Spectra’s own Grade Match and PlaneLok demos. Pick one and it plays here.

Spectra Precision GL412N video — GL412N + CR700: 6 Ways It Keeps Crews Accurate

The GL412N with the CR700 receiver on the jobsite: grade, remote, Grade Match and PlaneLok.

How It Works

Grade, Two Ways — Type It or Step It.

Press M, pick Grade, press E. The GL412N gives you two ways to put the number in, and you choose which one in the Settings menu. Either way it self-levels to the new grade, and the “A” symbols flash on the screen until it is there.

Digit Select (the default)

A cursor flashes on the Y grade. Left and Right move it digit by digit, Up and Down set each digit and the sign. Press E and the laser goes to grade. Hold Manual for 2 seconds to zero it.

Step and Go

Hold Up or Down and the grade changes, faster the longer you hold. Hold both together and it jumps to 0% and then moves in whole 1% steps. Press E to confirm.

Manual tilt

Press Manual and the arrows tilt the beam by hand on either axis, with no number entered. Press it again to go back to automatic.

Grade in percent or degrees

Read grade the way your plans are written: percent, degrees, or per mille (‰, tenths of a percent). Pick it once in the laser’s Settings menu, along with the HI alert time and the sensitivity.

Know your laser before it leaves the case.

Spectra GL412N keypad controls: Menu and Enter buttons, slope arrows, manual/standby button, power button, level LED, HI/manual LED and battery LED — **The keypad.** M opens the menu, E confirms, the arrows set grade, and Manual doubles as Standby. The RC1402 remote mirrors it.

Spectra GL412N peripherals: metal sunshade, sighting guides, beam exit, 5/8 x 11 tripod mount and rubber feet — **The housing.** Metal sunshade, sighting guides for aiming at the receiver, and 5/8 x 11 mounts for horizontal and vertical setups.

Grade Match

Match a grade that already exists.

Set up over the first point

Put the HL760 on a grade rod and take the reading beside the laser.

Walk the rod to the second point

Up to 330 ft out on the laser’s Y axis. Do not move the receiver on the rod.

Aim the laser

Turn it on the tripod with the sighting guides until it roughly faces the receiver.

Start it

M, choose Grade Match, E, pick the Y axis, E. The HL760 flashes -GM- while the laser searches.

Read the grade

The laser and the remote show the measured grade. Press Manual to leave Grade Match.

PlaneLok

Lock the beam to a point and keep it there.

Fix the receiver

Mount the HL760 at the second point, on grade, where it can stay for the job.

Aim the laser

Up to 330 ft away on the Y axis (horizontal) or the X axis (vertical).

Start it

M, choose PlaneLok, E, pick the axis, E. The HL760 flashes -PL- and stops when it is locked.

Leave it running

The laser keeps servoing to the receiver. Lose the signal for a minute and it goes to HI alert rather than drift.

Vertical PlaneLok: fit the 105516 adapter, photocell at the bottom, and keep the HL760 at least 2 ft off the ground.

Steps from the Spectra GL412N/GL422N user guide (2024) and Hands-On Training. Both are under Downloads.

The Receiver

The HL760 Gives You the Number.

Spectra HL760 Digital Readout Receiver - INCLUDED in GL412N Laser Package

Highly versatile receiver for everyday and advanced leveling and aligning applications

Works with GL412N in automatic Grade Match and PlaneLok applications

HL760 Laserometer Laser Receiver KEY FEATURES:

LARGE 5-INCH RECEPTION HEIGHT
Digital readout of elevation
Exact distance from on-grade displayed
Anti-strobe sensor to prevent false reading from jobsite strobe lights
Withstands a drop of up to 10-foot
Fingerprint function - detects only the laser beam of the paired transmitter

User Benefits:

No need to go “on-grade” to measure
Saves considerable time
Reduces rework by allowing remote monitoring
Increases reliability, accuracy and durability

GL412N when used with the HL760 DRO receiver, several advanced features can be utilized:

Grade Match: Wireless communication between the HL760 receiver and the transmitters provide automatic Grade Match which connects different elevations and will actually calculate and display grade values between two points when using the GL412N and GL422N.

PlaneLok: For applications that require maximum stability and accuracy is available on the horizontal Y-axis and in both vertical planes. PlaneLok automatically locks the beam on the DRO receiver and keeps it on-grade, reducing typical environmental factors that may induce an error.

PlaneLok for vertical alignments provides quick, accurate set-up and easy control.

Also provides the ability to quickly set up a vertical plumb or slope reference.

Spectra HL760 Digital Readout Receiver SPECIFICATIONS

HL760	Included in this package
Digital readout units	mm, cm, feet, inches, fractional inch
Reception height	5-inches
Six On-grade sensitivities	Ultra fine ~1/32 inch Super fine ~1/16 inch Fine ~1/8 inch Medium ~1/4 inch Coarse ~1/2 inch Calibration Mode ~1/64 inch
Battery Life (2 AA)	60+ Hours continuous operation
Auto shut-off	30 minutes / 24 hours
Operating Temp	-4°F to 122°F
Dust and Waterproof	Yes - IP67
Weight	13.1 oz
Warranty	3 Years "No Excuses"

Paired with the GL412N, the HL760 works across the laser’s 2,600 ft working diameter; its radio link to the laser reaches up to 330 ft.

$Spectra HL760 mounted on a grade rod, reading elevation in fractional inches$

Spectra HL760 digital readout: the display shows how far off grade you are as a number

Hover any photo to enlarge it.

The Remote

Change the Grade Without Walking Back.

Spectra Precision RC1402 Remote Control - INCLUDED in GL412N Laser Package

The Spectra RC1402 remote control mirrors the functionality of the laser keypad and offers additional features using the M and E buttons. This RC1402 Remote allows you to control the laser features and functions up to 330-feet away from the laser. Allowing for one person operation in many jobsite applications.

Spectra RC1402 Remote Controls...

Manual GradeRotation SpeedScan ModePre-Selected scan sizes 5°, 15°, 45°, 90°, 180°, 0°Automatic Grade MatchAutomatic Plane LokLine Scan (Vertical Setup)Beam Plunge (Vertical Setup)Mask Mode

Wireless Remote Specifications

RC1402	Included in this package
Operating Range	330-feet
Power Source	2 x 1.5V AA Alkaline Batteries
Battery Life	130 Hours
Dust and Waterproof	Yes - IP66

It switches itself off 5 minutes after the last button press, and pairs to the laser in a few seconds (steps in the user guide).

Spectra Precision RC1402 radio remote control for the GL412N

Specifications

Spectra Precision GL412N Single Grade Laser SPECIFICATIONS

GL412N	Spectra Precision
Leveling Accuracy	± 1.5 mm/30 m 1/16" @ 100 feet 10 arc seconds
Operating Diameter	800 m 2,600 feet
Grade Range	-10% to +15% Single Axis
Rotation	300, 600 rpm
Laser Type	red diode laser 650 nm
Laser Class	Class 2, <3.4 mW
Self-Leveling Range	±5° (±9%)
Leveling Indicators	LCD indications and LED flashes
Radio Range HL760	up to 330 feet
Power Source	10.000 mAh NiMH battery pack
Battery Life	35 hours NiMH 50 hours Alkaline
Operating Temperature	-4°F to 122°F
Storage Temperature	-4° to 158°F
Tripod Attachments	5/8 x 11 horizontally and vertically
Dust and Waterproof	Yes - IP66
Weight	6.8 lbs
Low voltage indication	LED battery indicator
Low voltage disconnection	unit shuts off
Warranty	5-Years

Also stated	Spectra GL412N/GL422N user guide, Rev E 03/24
Grade accuracy	±3.0 mm/30 m · 1/8" @ 100 ft · 20 arc seconds
Grade temperature drift	±0.9 mm/30 m per 1°C · 1/16" @ 310 ft per 1°F
Grades past 9%	Pre-tilt the laser (the +15% end of the range)
Grade Match / PlaneLok distance	Up to 100 m (330 ft) on the Y axis
Backup power	4 x D-cell alkaline batteries
Charge time	Approx. 13 hours from empty
Charging temperature	50°F to 104°F
Grade display	%, ‰ or °
Laser safety	Class 2 (IEC 60825-1:2014)

Two Things Worth Knowing.

Power: rechargeable, with an alkaline backup

The NiMH pack runs 35 hours and charges in about 13 hours. Forget to charge it and the laser still runs on 4 D-cell alkalines (not included), and indoors the charger can power it directly. Never take the cells out of the rechargeable holder to fit alkalines: Spectra warns that charging will then damage the unit.

Check it before the job, and after any drop

The GL412N carries a 5-year warranty on materials and workmanship, but calibration is the user’s responsibility. The 100 ft wall check takes a few minutes after a 20-minute warm-up; it is step by step in the user guide under Downloads.

Compare the Series

Which GL412N Do You Need?

Every GL412N package on our site, in one place. They all use the same GL412N laser. The GL412N itself is Spectra’s core package; every other part number is a kit Contractors-Tools.com builds around it. We customize kits so you get what you need to complete the job.

Swipe the chart sideways to see every column →

Kit	Receiver	Rod	Also includes	Price
►︎ SPECTRA CORE PACKAGE
GL412N YOU ARE HERE SPECTRA CORE	HL760	—	RECHARGEABLERC1402 REMOTEC70 ROD CLAMPSMALL CASE	$2,352.00
►︎ CUSTOM KIT · RECEIVER + REMOTE
GL412N-14 CUSTOM KIT	CR700	—	RECHARGEABLERC1402 REMOTEC70 ROD CLAMPC71 MAG MOUNTSMALL CASE	$2,526.00
►︎ CUSTOM KITS · TRIPOD + GRADE ROD
GL412N-17 CUSTOM KIT	HL760	TENTHS 15 ft rod 11-815-T	RECHARGEABLEALQR20 TRIPODRC1402 REMOTEC70 ROD CLAMPSMALL CASE	$2,426.00
GL412N-27 CUSTOM KIT	HL760	INCHES 15 ft rod 11-815-C	RECHARGEABLEALQR20 TRIPODRC1402 REMOTEC70 ROD CLAMPSMALL CASE	$2,426.00
GL412N-16 CUSTOM KIT	CR700	TENTHS 15 ft rod 11-815-T	RECHARGEABLEALQR20 TRIPODRC1402 REMOTEC70 ROD CLAMPC71 MAG MOUNTSMALL CASE	$2,726.00
GL412N-26 CUSTOM KIT	CR700	INCHES 15 ft rod 11-815-C	RECHARGEABLEALQR20 TRIPODRC1402 REMOTEC70 ROD CLAMPC71 MAG MOUNTSMALL CASE	$2,726.00
GL412N-1 CUSTOM KIT	CR700	TENTHS 15 ft rod GR151	RECHARGEABLEQ104025 TRIPODRC1402 REMOTEC70 ROD CLAMPC71 MAG MOUNTLARGE SYSTEM CASE	$2,695.00
GL412N-2 CUSTOM KIT	CR700	INCHES 15 ft rod GR152	RECHARGEABLEQ104025 TRIPODRC1402 REMOTEC70 ROD CLAMPC71 MAG MOUNTLARGE SYSTEM CASE	$2,695.00
►︎ CUSTOM KITS · LASER ONLY
GL412N-BCC CUSTOM KIT	None	—	RECHARGEABLESMALL CASE	$1,850.00
GL412N-BL CUSTOM KIT	None	—	RECHARGEABLENO CASE	$1,950.00

Custom kits are built by Contractors-Tools.com. Prices are live from our store. Every GL412N, core or custom, carries the same 5-year Spectra laser warranty. Need a combination you do not see? Call 1-877-866-5721.

Grade Laser Comparison

How the GL412N Compares.

Our full comparison against the GL422N, GL612N, GL622N and UL633, plus the component-by-component chart for the GL412N and GL422N packages.

Open the full comparison charts

GL412N Series Package COMPARISON
Part #		Remote
SINGLE GRADE GL412N PACKAGE OPTIONS
SINGLE GRADE - RECEIVER + REMOTE PACKAGES
GL412N	HL760 Deluxe Receiver with C70 Receiver Adapter and 105516 Vertical Adapter	RC1402
GL412N-14	CR700 Machine and Rod Mount Receiver with C70 Rod Clamp and C71 Magnetic Mount	RC1402
SINGLE GRADE - COMPLETE PACKAGES
GL412N-17	HL760 Deluxe Receiver with C70 Receiver Adapter and 105516 Vertical Adapter SitePro ALQR20 Heavy-Duty Tripod, Measuring Rod (10ths)	RC1402
GL412N-27	HL760 Deluxe Receiver with C70 Receiver Adapter and 105516 Vertical Adapter SitePro ALQR20 Heavy-Duty Tripod, Measuring Rod (Inches)	RC1402
GL412N-16	CR700 Machine and Rod Mount Receiver with C70 Rod Clamp and C71 Magnetic Mount SitePro ALQR20 Heavy-Duty Tripod, Measuring Rod (10ths)	RC1402
GL412N-26	CR700 Machine and Rod Mount Receiver with C70 Rod Clamp and C71 Magnetic Mount SitePro ALQR20 Heavy-Duty Tripod, Measuring Rod (Inches)	RC1402
DUAL GRADE GL422N PACKAGE OPTIONS
DUAL GRADE - RECEIVER + REMOTE PACKAGES
GL422N	HL760 Deluxe Receiver with C70 Receiver Adapter and 105516 Vertical Adapter	RC1402
GL422N-14	CR700 Machine and Rod Mount Receiver with C70 Rod Clamp and C71 Magnetic Mount	RC1402
GL422N-NR	HL760 Deluxe Receiver with C70 Receiver Adapter and 105516 Vertical Adapter	NO REMOTE
DUAL GRADE - COMPLETE PACKAGES
GL422N-27	HL760 Deluxe Receiver with C70 Receiver Adapter and 105516 Vertical Adapter Heavy-Duty Tripod, Measuring Rod (Inches)	RC1402
GL422N-16	CR700 Machine and Rod Mount Receiver with C70 Rod Clamp and C71 Magnetic Mount Heavy-Duty Tripod, Measuring Rod (10ths)	RC1402
GL422N-26	CR700 Machine and Rod Mount Receiver with C70 Rod Clamp and C71 Magnetic Mount Heavy-Duty Tripod, Measuring Rod (Inches)	RC1402
All part numbers include laser transmitter, case and NiMH rechargeable battery pack and charger

NEED HELP or HAVE QUESTIONS? Give us a call 1-877-866-5721

GRADE LASER COMPARISON CHART

GL412N

Accuracy

1/16-inch @ 100-ft
10 arc seconds

Operating
Diameter

2,600-feet

Self-
Leveling
Range

±5 degrees electronic servo self-leveling

±14 degrees electronic servo self-leveling

Grade Range

-10 to +15%

-25% to +25%

Slope Type

Single

Dual

Single

Dual

X, Y, Z axis

Power
Source

4 x D-Cell NiMH Rechargeable Battery Pack

Battery
Life

35 Hours NiMH Rechargeable
50 Hours Alkaline

35 Hours NiMH Rechargeable
40 Hours Alkaline

Rotation Speed

300, 600 rpm

300, 600, 750 rpm

0 to 900 rpm

0 to 750 rpm

Water
Resistance

Yes IP66

Size (inches)
L x W x H

10.7 Length x 7.7 Width x 7.9 Height

9.4 Length x 5.9 Width x 11 Height

Weight

6.8 lbs

Warranty

5-Year

Wireless Remote Specifications

Remote Control
Type 2-way
Communication

RC1402

RC602N

RC603N

Battery Type

130 hrs continuous
1 year normal use

Range

330 feet

490 feet

Spectra Precision GL412N Laser PACKAGE COMPARISON CHART
Part Number	Receiver HL760	Receiver CR700	Receiver Clamp	Machine Mag Mount	Remote	Batteries	Vertical Mount	15' Foot Grade Rod	Tripod	Small Case

SINGLE GRADE GL412N PACKAGE OPTIONS
GL412N	HL760		C70		RC1402	Rechargeable	YES			YES
GL412N-14		CR700	C70	C71	RC1402	Rechargeable	YES			YES
GL412N-17	HL760		C70		RC1402	Rechargeable	YES	Tenths	YES	YES
GL412N-27	HL760		C70		RC1402	Rechargeable	YES	Inches	YES	YES
GL412N-16		CR700	C70	C71	RC1402	Rechargeable	YES	Tenths	YES	YES
GL412N-26		CR700	C70	C71	RC1402	Rechargeable	YES	Inches	YES	YES
DUAL GRADE GL422N PACKAGE OPTIONS
GL422N	HL760		C70		RC1402	Rechargeable	YES			YES
GL422N-14		CR700	C70	C71	RC1402	Rechargeable	YES			YES
GL422N-NR	HL760		C70			Rechargeable	YES			YES
GL422N-27	HL760		C70		RC1402	Rechargeable	YES	Inches	YES	YES
GL422N-16		CR700	C70	C71	RC1402	Rechargeable	YES	Tenths	YES	YES
GL422N-26		CR700	C70	C71	RC1402	Rechargeable	YES	Inches	YES	YES

NEED HELP or HAVE QUESTIONS? Give us a call 1-877-866-5721

Reading the Lights

What the LEDs Are Telling You.

Green, flashing once a second

Self-leveling. Wait for it.

Green, solid, then a flash every 4 seconds

Level, and the HI alert is armed. Solid for the first 5 minutes or 30 seconds, depending on your HI alert setting.

Red HI/MAN, flashing once a second

Manual mode: the beam is not self-leveling.

Red HI/MAN, flashing every 5 seconds

Standby: the beam is off, the HI alert stays on. Hold Manual 3 seconds to wake it.

Red battery LED flashing

Battery getting low (3.8 to 4.0 V). Solid red means charge it now.

From Spectra’s GL412N/GL422N Hands-On Training and user guide.

QUESTIONS & ANSWERS

GL412N Questions We Actually Get.

Grouped so you can find yours. Buying questions first, then how to work it, then what to do when something is wrong.

Before You Buy 11

What is the Spectra GL412N?

A self-leveling single grade laser that does three jobs: level, grade on one axis, and vertical alignment, read with a receiver such as the HL760 in this package.

What is the difference between the GL412N and the GL422N?

Same laser, same accuracy and range. The GL412N takes an entered grade on one axis (Y); the GL422N takes a grade on both X and Y. If you only ever slope one direction, such as a pipe run, a driveway or a single-fall slab, the GL412N does the job.

Can I enter a slope percentage, like 2%?

Yes. The GL412N is an automatic single grade laser: you type the grade into the Y axis on the keypad or the RC1402 remote, from -10% to +15%, and it self-levels to it. You do not have to tilt it by hand.

How accurate is it?

Leveling accuracy is ±1.5 mm at 30 m (1/16 in at 100 ft); grade accuracy is ±3.0 mm at 30 m (1/8 in at 100 ft), per the Spectra GL412N/GL422N user guide.

How far does it work?

Up to 2,600 ft working diameter (about 1,300 ft from the laser) with a receiver, so one setup covers a large job site.

How much grade can it run?

From -10% to +15% on the Y axis. It self-levels within ±5° (±9%); for grades past 9% you pre-tilt the laser.

Is it Spectra’s package or a Contractors-Tools.com kit?

The GL412N is Spectra’s core package: laser, HL760 receiver with C70 clamp, 105516 vertical adapter, RC1402 remote, rechargeable batteries and the small case. Every other GL412N part number on our site is a kit we build around the same laser. We customize kits so you get what you need to complete the job.

How long does the battery last? What if I forget to charge it?

The rechargeable NiMH pack runs typically 35 hours and charges in about 13 hours. It also runs on 4 D-cell alkaline batteries (not included, about 50 hours), and indoors the charger can power the laser, so a missed charge does not end your day.

How tough is it?

IP66 dust and water protected, with a metal sunshade, and built to survive drops of up to 3 ft onto concrete and tripod tip-overs up to 5 ft. Check accuracy after any drop.

What is the warranty?

5 years on the GL412N laser for materials and workmanship (calibration is not covered) and 3 years “No Excuses” on the HL760 receiver.

Where can I buy it?

Contractors-Tools.com is an authorized Spectra Precision dealer. Call 1-877-866-5721.

Using It 7

How do I dial in a grade?

Press M, choose Grade, press E, set each digit with the arrow buttons and press E again (Digit Select). Or switch to Step and Go in Settings and hold an arrow to step the grade. The RC1402 remote does the same from up to 330 ft.

Can it measure the slope of existing ground?

Yes. Grade Match measures the grade between two points with the HL760, up to 330 ft out on the Y axis, and shows it on the laser and the remote.

What does PlaneLok do?

PlaneLok locks the beam onto the HL760 at a fixed point by radio, so temperature and weather do not move your elevation. It works horizontally on the Y axis and vertically on the X axis, up to 330 ft.

What happens if someone bumps the tripod?

The height-of-instrument (HI) alert stops rotation, turns the beam off and shows a warning, so you do not keep working off a bad setup. You can set it to 5 minutes (default), 30 seconds or off.

Can I use it vertically?

Yes. Lay it on its side and it detects vertical when switched on. Line Scan centres the beam and the arrow buttons move the line, for anchor bolts, forms and layout.

Can I keep the beam off other crews’ receivers?

Yes. Mask mode switches the beam off in up to 3 of the 4 lighthouse windows. It always powers up with mask mode off.

How do I check calibration?

Set up 100 ft from a wall, let it warm up 20 minutes, set 0.000%, and mark the beam on +Y and -Y. If the marks differ by more than 1/8 in, it needs calibrating. Repeat for the X axis. The full procedure is in the user guide under Downloads.

Troubleshooting 5

The screen shows Error 120. What happened?

The HI alert tripped: the laser’s height changed, usually a bumped tripod or a sinking leg. Press E to clear it, then re-check your elevation against your benchmark before you keep working.

Error 130 during Grade Match or PlaneLok?

The laser hit its mechanical limit. Spectra’s fix: check whether the existing slope is above ±9%, and if it is, pre-tilt the laser toward the slope and try again.

Error 150 or 152: no receiver?

The laser cannot find the HL760. Check that the receiver is on, paired and within the 330 ft operating range, then restart the function.

Error 155?

More than two paired receivers are switched on during an automatic function. Turn the extra receiver off.

The remote shows only its model number.

It is out of range or not paired. Pair it: with both off, hold Manual and switch on the laser, then do the same on the remote within 6 seconds. After changing the radio channel, re-pair the remote and the HL760.

PARTS & ACCESSORIES

Buy the Piece, Not Another Kit.

Every part of the GL412N package, sold on its own. If you are one piece short, buy the piece — do not buy another kit.

Power

Q104234$85.00

Rechargeable NiMH Pack, 10,000 mAh

In this package. A second pack: one on the charger, one in the laser.

95720-00$49.95

Charger

In this package. Spare or replacement charger.

Receiver & control

HL760$416.00

Digital Readout Receiver

In this package. A second receiver for a second crew member.

C70$52.95

Rod Clamp

In this package. Holds the HL760 or the CR700 on a grade rod.

105516$30.75

Vertical Adapter for HL Receiver

In this package. For vertical PlaneLok and layout.

RC1402$250.00

Radio Remote Control

In this package. Spare or replacement remote.

CR700$580.00

Machine or Rod Receiver

Put a receiver on the machine; pair it with the C71 magnetic mount.

C71$129.95

Magnetic Mount for CR700

Holds the CR700 on the excavator stick or blade.

Setup & storage

5289-0025$95.00

Small Laser Carrying Case

In this package. Replacement case for the GL412N.

01-ALQR20-B$135.00

SitePro Heavy-Duty Head Aluminum Tripod

The tripod in our small-case tripod-and-rod GL412N kits.

GR151$85.00

Aluminum Grade Rod, TENTHS

15 ft rod reading in tenths of a foot.

GR152$85.00

Aluminum Grade Rod, INCHES

15 ft rod reading in inches.

DOWNLOADS

Manuals and Documentation.

Spectra Precision GL412N Single Grade Laser DOWNLOADS

GL412N User Guide — GL412N / GL422N, 2024 edition (PDF)

Setup, grade entry, Grade Match, PlaneLok, settings, error codes, calibration, specs. 31 pages, Rev E 03/24.

GL412N / GL422N Manual del usuario, 2024 (PDF, Español)

La guía del usuario en español. 30 páginas.

Spectra Precision GL412N Hands-on-Training (PDF)

Spectra’s training deck: controls, batteries, remote pairing, grade entry, Grade Match, PlaneLok, settings, error codes. 35 slides.

GL412N Datasheet (PDF)

Applications, key features and technical specifications. 2 pages.

GL412N Hoja de datos (PDF, Español)

Aplicaciones, características y especificaciones. 2 páginas.

Datasheet as images: GL412N Datasheet page 1 · GL412N Datasheet page 2

REVIEWS

What Buyers Say.

★★★★★

Great

“I’m very happy with what I purchased!! Kevin the owner called me personally to make sure everything was in check. I’m very satisfied on this company, everything went smoothly. This is a great place to order all of your excavation needs!!! Thanks ”

Verified buyer · GL412N-2 · Nov 2023

★★★★★

Great Tool

“This is a great tool. Easy set up and simple operation. For the money you can not find a better system.”

Verified buyer · GL412N-27 · Dec 2022

★★★★★

GL 412

“Had to YouTube to find out how to work the machine. After I charged the battery, I put it to work. Works as good as my old 945 transmitter. Would recommend others that need a single grade laser to buy.”

Verified buyer · GL412N-BCC · Feb 2023

Each one was left on the GL412N kit that buyer actually bought. The laser is identical in every kit — what changes is the receiver, the tripod, the rod and the case. Printed word for word.

Authorized Spectra Dealer

Call 1-877-866-5721

Questions about the GL412N? Family owned and operated. We set these systems up every week — tell us the job and the laser you are running and we will spec it before you order.

Contractors-Tools.com

Experience the value of Great Customer Service!

Laser Orientation:

Horizontal / Vertical

Application:

Interior / Exterior

Laser Color:

Red

Laser Range (diameter):

2,600 feet

Laser Accuracy:

1/16-inch

Grade Type / Range:

Single / -10% to +15%

Plumb Point:

Battery Type:

Rechargeable

Receiver:

HL760 (5-inch Capture Height)

Remote Control:

Yes

QUICK SHIP:

This Laser is in stock with Fast Shipping!

kit-products:

Spectra GL412N, Spectra HL760, Spectra RC1402, Spectra Precision 105516, Spectra Q104234, Spectra Precision 95720-00, Spectra 5289-0025

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