LR30-1 Machine Display Receiver with Alkaline Batteries
5-channel display for dozers, graders, scrapers and skid steers
Not compatible with the RD20 wireless in-cab display
Free same-day shipping on orders placed by 12 noon Central
Spectra Precision LR machine receivers
Turn a two-person job into a one-man operation.
Add this to the laser you already have. Simple technology that helps you solve problems, dig faster, for less money, and gets you on grade sooner.
Authorized DealerWe'll match the receiver to your machine and laser.
Spectra Precision LR30-1 Laser Receiver
The Spectra Precision® Laser LR30 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.
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.
Rugged and waterproof, the LR30 receiver withstands all weather environments.
Internal isolating shock mounts protect the electronics.
This LR30-1 is not equipped with a wireless transmitter.
This product cannot be paired and will not work with the optional RD-20 In-Cab Wireless display.
Spectra Precision LR30-1 Receiver INCLUDES
- LR30 Receiver with Holding clamps
- 4 x C-Cell Alkaline Batteries
- Case
- Manual
Spectra Precision LR30-1 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 4 x C-Cell Alkaline Batteries
Spectra Precision LR30-1 APPLICATIONS
- Machine mounted grade checking
- Grading and leveling
The Spectra Precision LR Machine Receiver Range
Every LR machine receiver we carry, by family. Prices are live from our store. Tap any one to see it.
How to read these part numbers
- 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.
Spectra Precision LR30 Comparison Chart
Spectra Precision LR30W Wireless Comparison Chart
Spectra Precision Laser Receiver Product Application
MACHINE LASER RECEIVER COMPARISON CHART
| Specifications | LR20 | LR30 / LR30W | LR50 / LR50W | LR60 LR60W |
|---|---|---|---|---|
| Number of Display Channels | 5-Channel | 5-Channel | 5-Channel 6-Channel in Excavating Mode | 9-Channel |
| ACCURACY: Center on grade mode (grading) | Fine: 0.20" Standard: 0.40" Wide: 0.80" | Fine: 0.20" Standard: 0.45" Wide: 1.25" | Fine: 0.20" Standard: 0.40" Wide: 0.80" | Setup 0.25" Fine: 0.40" Standard: 0.80" Wide: 1.60" |
| ACCURACY: Offset on grade mode (grading) | Fine: 0.50" Standard: 1.0" Wide: 2.0" | NA | Fine: 0.50" Standard: 1.0" Wide: 2.0" | Setup 0.25" Fine: 0.50" Standard: 1.0" Wide: 2.0" |
| ACE Angle Compensation Mode | NA | NA | NA | Fine: 0.50" Standard: 1.0" |
| Blade-Tilt Accuracy | NA | NA | ±0.5°, ±1.5°, ±2.5° | NA |
| Plumb-Swing Accuracy | ±0.5°, ±1.5°, ±2.5° | NA | ±0.5°, ±1.5°, ±2.5° | Standard: .05" Angle Compensated Mode: 1.0 in |
| Beam Reception | 360 | 360 | 360 | 360 |
| Vertical Reception | 8 | 6.75 | 6.75 | 8.75 |
| LED Battery Life Alkaline Bright / Dim NiMH Bright / Dim | 35 hours | 50 - 75 hours 40 - 50 hours | 45 - 60 hours 30 - 45 hours | 45 - 75 hours 40 - 50 hours |
| Battery Recharge Time | 3-4 | 3-4 | 3-4 | 3-4 |
| Size | 9.5 x 4.38 x 1.85 | 13.5 x 5.6 x 5.9 | 13.5 x 5.6 x 5.9 | 15.5 x 5.6 x 5.9 |
| Weight | 2.5 | 5.5 | 5.5 | 6.0 |
| Receiver Warranty | 2 Years | 2 Years | 2 Years | 2 Years |
LR20
Compact Laser Receiver- 8-inch Receiving Height
- 360-degree laser reception provides large working area and range
- Super bright grade display with Green on-grade LED-s provides superior depth/elivation indication
- Center and offset on-grades are ideal for both grading and excavation applications
LR30
LR30W
Used on Grading and Excavating equipment including:Dozers, Graders, Scrapers, Skid Steers, Box Blades and Levelers
- 6.75-inch Receiving Height
- 360-degree laser reception picks up the laser from all directions
- Five channels of grade information plus directional out-of-beam indicators
- Three selectable accuracies meet job tolerances from rough grading to final finishing.
- Ultra-bright LED's with Green on-grade provides easy-to-see display to match ambient lighting conditions
LR50
LR50W
Features Built-in Blade Tilt and Excavation Plumb Indicator- 6.75-inch Receiving Height
- 360-degree laser reception provides large working area and range
- Built-in blade tilt indicator help the operator keep the blade level for increased accuracy and productivity
- Center on-grade provides an equal amount of grade information above and below on-grade. Use on dozers, graders, scrapers and box blades.
- Built-in plumb indicator for fast, accurate grade checking in excavation applications
- Offset On-Grade gives you more range above grade using the entire receiver for more productive excavation
- Up to six channels of grade information
- Directional out of beam indicators
LR60
LR60W
Features Excavation Plumb Indicator and Angle Compensation Indication
- 8.75-inch Receiving Height
- 360-degree laser reception provides large working area and range
- Patented Angle Compensation Indication automatically calculates and corrects the grade display for the angle of the dipper arm
- Check Grade with the dipper arm extender or retracted up to 30-degrees
- Built-in plumb indicator for fast, accurate grade checking
- Center on-grade provides an equal amount of grade information above the below on-grade. Use on dozers graders, scrapers and box blades.
- Extended reception height stays in the beam longer providing addional grade information.
- Offset on-grade for productive excavation
- Up to eight channels of grade information plus directional out-of-beam indicators.
- Four selectable accuracies for eac on-grade location.
Spectra LR30 — 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 LR30-1 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.
Can I add the RD20 wireless display later?
No, not sensibly. The LR30-1 has no radio, and fitting one is an expensive factory service. If you might want the in-cab display, buy the LR30W instead. They look the same from the outside.
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 LR30 runs about 50 hours (display dim) or 40 hours (bright) on Ni-MH, and 75 or 50 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.
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.
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.
LR Series Comparison SheetSpectra Precision LR20, LR30, LR50 and LR60 side by side · imageOpen full size →
LR30 / LR30W User GuideDeadband settings, batteries and charging, beam averaging, mounting and specificationsDownload PDF →
LR Series DatasheetLR20, LR30, LR50 and LR60 compared · 4 pagesDownload PDF →
LR Receivers and RD20 Hands-On TrainingSpectra Precision training manual: deadband, on-grade offset, RD20 setup, pairing, mounting and power · 75 pagesDownload PDF →While you are here
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.
What the operator sees, from the seat
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.
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