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Spectra Precision LR30W Laser Receiver
Where it works
The Spectra Precision® Laser LR30W Laser Display Receiver is designed to be used as a stand-alone display receiver on grading and excavating equipment including: dozers, backhoes, excavators, scrapers, skid steers, and levelers.
360° reception
The versatile, easy-to-use LR30 features 360-degree laser detection and works with all types of rotating lasers on all types of machinery for fast, no-hassle setup.
Built tough
Rugged and waterproof, the LR30 receiver withstands all weather environments.
In-cab display
Internal isolating shock mounts protect the electronics.The LR30W is designed to work with the RD20 Remote Display.
Spectra Precision LR30W-DM Receiver INCLUDES
LR30W Receiver with Holding clamps
RD20 Wireless Remote Display
DM-20 Bulldozer Bolt-On Mount/Mast
4 x C-Cell NiMH Rechargeable Batteries
Charger & Adapter
Case
Manual
Our price$2,195.00Spectra Precision LR30W-DM, sold and supported by Contractors-Tools.com
Spectra Precision LR30W-DM Key FEATURES and BENEFITS
Use on grading and excavating equipment including: dozers, graders, scrapers, skid steers and levelers
Five channels of grade information plus directional out-of-beam indicators
Three selectable accuracies meet job tolerances from rough grading to final finishing
Full 360-degree reception picks up the laser from all directions
Ultra-bright LED’s with Green on-grade provides easy-to-see display to match ambient lighting conditions
Powered by NiMH Rechargeable Batteries
Recharge time 2-hours
Spectra Precision LR30W-DM APPLICATIONS
Machine mounted grade checking
Grading and leveling
Spectra Precision RD20 Remote Display OVERVIEW
Spectra Precision® RD20 Wireless Remote Display... Puts grade information in the cab
The Spectra Precision® RD20 Wireless Remote Display provides grade information in the cab of the machine for easy operator viewing. The RD20 works with LR receivers equipped with wireless capability: LR30W, LR50W and LR60W. Additionally, most receiver adjustments can now be set in the cab. With bright, multi-colored grade LEDs and audible signals in the cab, the operator is free to focus on the work at hand and the terrain. Multiple mounting options allow optimum placement of the remote.
LR30 vs LR30W The W means wireless. A LR30W pairs with the RD20 display so the operator reads grade in the cab. A plain LR30 has no radio. Both look the same, and adding wireless to a plain LR30 later means an expensive factory service, so buy the W up front if you might want the cab display.
-MM Includes the MM-1 magnetic mount, for excavators and backhoes.
-DM Includes the DM-20 bolt-on mount, for dozers.
-1 Runs on alkaline batteries instead of the NiMH rechargeable pack.
LR30W-2 The wireless LR30W receiver without the RD20 display, for when you already have one or will add it later.
Use receiversLR50- OR -Wireless In-Cab DisplayLR50W
ApplicationElevation Display Lift Control
Questions We Actually Get
Spectra LR30W — Straight Answers
Everything below comes from Spectra Precision's own documentation for these
receivers, which we host on this site. If your question is not here, call
1-877-866-5721 and ask a person who sets these up.
What is the Spectra LR30W-DM best suited to?
General grading: dozers, graders, scrapers, skid steers and box blades. It is a 5-channel machine display receiver (High, Fine High, On-Grade, Fine Low, Low) with directional arrows telling the operator to raise or lower the blade. For blade tilt or excavator plumb, step up to the LR50 or LR60.
Does it work with the RD20 in-cab display?
Yes. The LR30W-DM is wireless and pairs with the Spectra RD20, so the operator reads grade in the cab with lights and an audible tone. The RD20 is included in this package.
How accurate is it?
Per Spectra’s LR30 user guide, the on-grade band is 5 mm (0.20 in) on Fine, 12 mm (0.45 in) on Standard and 32 mm (1.25 in) on Wide.
How far will it pick up the laser?
Over 460 m (1500 ft) radius, depending on the laser, with 360-degree reception and a 171 mm (6.75 in) vertical reception window.
How long do the batteries last?
Per Spectra’s user guide the LR30W runs about 30 hours (display dim) or 20 hours (bright) on Ni-MH, and 40 or 30 hours on alkaline. It can also run from machine power, 10 to 30 V DC. Recharge takes 3 to 4 hours.
Does it shut itself off?
Yes. It turns off after 75 minutes with no laser beam, to save the batteries.
What mast sizes do the clamps fit?
Round tube 42 to 50 mm (1.66 to 2.00 in) outside diameter, or 38 mm (1.5 in) square tube.
What rotation speed should my laser run?
Run the laser at 600 RPM or faster for a responsive display on a machine. Spectra lists 105 RPM as the minimum the receiver tolerates, not a working speed.
What is deadband, and which setting should I use?
Deadband is the on-grade zone. Spectra’s hands-on training puts it simply: a wider deadband cuts the noise and the constantly changing readings, which suits the first pass and rough grading. A narrower one is more accurate, for the final finish pass. The LR30 has three: 5, 12 and 32 mm.
Which machines is the LR30 the right receiver for?
Spectra’s own training says the LR30W is the correct tool for any dozer. The LR30 family suits general grading on dozers, graders, scrapers, skid steers and box blades. For excavator plumb or blade tilt, look at the LR50; for angle compensation on excavators, the LR60.
How loud is the RD20, and can I hear grade instead of watching?
Yes. The RD20 has high, on-grade and low tones that match its lights, at 105 dB, 95 dB or 65 dB, or off. It remembers the last setting after a power cycle.
How is the RD20 powered and mounted?
Either 2 AA batteries (about 20 hours on alkaline) or machine power through the included cable, P/N 010983, at 10 to 30 V DC. The batteries do not charge from machine power. It mounts with the quick-disconnect plate using bolts, the supplied adhesive tape or 3 magnets, with an optional swivel suction cup for the window.
Do I have to pair the RD20 with the receiver?
No. The RD20 and receiver are paired at the factory. If you ever move an RD20 to a different LR30W, Spectra’s hands-on manual gives a button sequence to re-pair them, and it takes about 10 seconds.
What happens if the RD20 loses the radio link?
Both units flash a pattern to tell you. The RD20 alternates its top red and bottom blue lights with the on-grade greens, and the receiver flashes its corner reds. To run the receiver on its own without the RD20, cycle its power to clear the warning.
What is the DM-20 mount for?
It is a bolt-on mast for dozers, so the receiver sits up high where it can see the laser.
Who am I buying from?
Contractors-Tools.com, an authorized Spectra Precision dealer. Family owned, free shipping, and real people who set these up. Call 1-877-866-5721.
Source: Spectra Precision LR30 / LR30W user guide and Spectra LR receiver and RD20 hands-on training manual.
Spectra LR30 How-To Videos
Short videos from Contractors-Tools.com on setting up and running Spectra LR machine receivers.
Spectra Machine Receiver on a Dozer - Wireless In-Cab Display (RD20)
Grading with a dozer using a Spectra machine receiver and a wireless in-cab display. The operator reads grade off the dash instead of looking back at the mast — on grade, high or low at a glance, while the blade keeps mo
Six reasons why adding a Spectra Precision laser machine receiver to your grade laser setup changes everything on the job site. Covers performance advantages, accuracy benefits, and workflow improvements from using a Spe
Downloads — Spectra Precision LR30 / LR30W
Spectra Precision’s own documents, free to download. Authorized Spectra Precision dealer — Contractors-Tools.com.
Your laser tells the site where grade is. It still cannot tell the operator.
A machine receiver on the mast puts the laser plane on the machine. The operator
still reads a bargraph and works out the rest.
iDig puts depth, slope and distance to target on a screen in the cab
— read straight off the cutting edge, off the same rotary laser or benchmark you already
shoot. No grade checker in the hole. No cable down the boom.
See the iDig range →Wireless solar sensors, in-cab LED bargraph and a touchscreen tablet. Excavator and skid steer systems.
Installs in an afternoon. Contractors-Tools.com is an authorized iDig dealer —
call 1-877-866-5721.
Family owned and operated. We set these systems up every week — tell us the
machine and the laser you are running and we will spec it before you order.
