LR50W-MM Machine Receiver
The rugged GL1425C laser can withstand drops of up to 3 feet onto concrete and tripod tip overs up to 5 feet. This strength, combined with full weatherproofing and dustproofing, reduces downtime and lowers repair costs over the life of the product.
The GL1425C-ExcavatorMAXX-2 pairs the GL1425C dual grade laser with the Spectra LR50W-MM Machine Receiver — a dedicated excavator receiver with 360° reception, wireless in-cab LED bar display via the RD20 remote display, and audible tones (fast beep = High / slow beep = Low / constant tone = On grade). See grade status right inside the cab without looking at the boom.
- GL1425C Dual Slope Grade Laser
- Deluxe HL760 Receiver
- Large 5" Capture Height
- Smartphone Bluetooth App Remote Control
- Free app — set grade, fine-tune slope, control laser from your phone
- RC1402N Handheld Remote Control
- Rechargeable NiMH Battery Pack B10
- Alkaline AA batteries also accepted as backup
- Charger 120412-00
- Protective Carrying Case
- Multilanguage CD, Quick User Guide and Safety Instructions
- 5-Year Laser Warranty

- LR50W-MM Machine Receiver with Holding Clamps
- MM-1 Magnetic Mount — included
- RD20 Wireless Remote In-Cab Display
- Audible tones: Fast beep = High / Slow beep = Low / Constant tone = On grade
- Quick Disconnect RD20 Mounting Plate
- Bolt-On
- (3) Magnets
- Double Sided Tape
- 4 x C-Cell NiMH Rechargeable Batteries
- Alkaline C-Cell batteries also accepted as backup
- Charger 120 Volt AC & Adapter 991604-99
- Charger Adapter 010542-99
- (2) Cigarette Lighter Power Cords
- One for LR50W — charges batteries while powering receiver
- One for RD20 — powers the display only (does not charge)
- Case 010636-99 — Operators Manual for LR50W and RD20
- 2-Year Warranty

GL1425C Dual Grade Laser — Key Specs
- ✓ Dual grade range: -10% to +15%
- ✓ 2,600 ft working diameter
- ✓ Grade accuracy: 1/8" @ 100’
- ✓ Bluetooth + RC app control
- ✓ HL760 5" capture receiver (std kit)
- ✓ Smartphone remote via free app
- ✓ Self-leveling (both grade axes)
- ✓ IP66 weatherproof & dustproof
- ✓ 3-ft drop rated onto concrete
- ★ 5-Year Warranty
- ✓ NiMH rechargeable battery — 45 hrs
- ✓ 300 / 600 / 900 RPM rotation
- 360° reception — catches the laser beam from any direction as the boom swings
- Wireless in-cab display (RD20) — grade status at eye level inside the cab, no looking at the boom
- Audible tones: Fast beep = High / Slow beep = Low / Constant tone = On grade
- Boom plumb indicator — know when the boom is vertical
- Magnetic mount included for fast, tool-free boom attachment
- Compatible with GL1425C — works directly with the laser’s rotating beam
- Grade visible inside the cab — no need to look at the boom
- Audible tones mean you never miss a grade change even eyes-forward
- Best when the boom is not visible from the operator seat
- Complete system in one kit — receiver, wireless display, and mag mount
LR50W-MM (THIS KIT): Wireless in-cab LED bar display (RD20) shows grade status inside the cab, plus magnetic mount is built into the unit for fast, tool-free boom attachment. Remote display has audible tones: Fast beep = High / Slow beep = Low / Constant tone = On grade. Best when the boom is not visible from the seat or the operator prefers an in-cab readout with integrated mounting.
LR50: Grade status displayed via bright LED bars ON THE RECEIVER ITSELF. No separate in-cab display. Simpler, leaner, lower cost — ideal when the operator can see the boom. See the GL1425C-ExcavatorMAXX-21 for the LR50 package.
- GL1425C is dual grade plus horizontal and vertical.
- Simple, accurate dial in grade from -10% to +15%
- Up to 2,600 ft working diameter which increases productivity by reducing need for multiple set-ups on a large job site
- Fully automatic self-leveling in both grade axis, horizontal, and vertical which provides fast, accurate setup in all applications
- Fast setup, minimal training time and automatic self-leveling minimize operating costs and boost productivity
- Highly rugged design and patented lighthouse seal protects the rotor head and glass and offers superior drop and weather protection for reduced downtime
- 2-way full function remote control allows grade changes to be made from anywhere on the jobsite
- Temperature calibrated for high accuracy over wide temperature changes
- IP66 dust and water-proof to withstand harsh jobsite conditions
- Mask mode eliminates interference from other crews on the jobsite
- Automatic Grade Match and PlaneLok
- Excavating to grade — trenches, footings, basements
- Leveling concrete forms and footers
- General construction vertical alignment and plumb such as anchor bolt and form alignment
- Over the top sewer and storm drain pipe installations
- Sports fields, tennis courts and driveways
- Grading and excavating
- Steep slope road embankments and ditch banks
- Ramps and drainage
| Leveling Accuracy | 1.5 mm/30 m | 1/16" @ 100 feet | 10 arc seconds |
| Grade Accuracy | 1/8" @ 100 feet |
| Grade Temperature Drift, typical | 1/16" @ 310 feet @ 1°F |
| Grade range no tilt adjustment | Typical 9% |
| Grade range w/ tilt adjustment | 15% |
| Rotation Speed | 300, 600, 900 RPM |
| Operational Diameter | 2,600 feet diameter |
| Laser Type | 630 - 643 nm |
| Laser Class | Class 2 |
| Self Leveling Range | Typical 5 / 8% |
| Operating Temperature | -4°F to +122°F |
| Storage Temperature | -13°F to +158°F |
| Power Source | 10,000 mAh NiMH battery pack included — or — 4 each 1.5 Volt D Alkaline Batteries (Not Included) |
| Battery Life Time NiMH | Typical 45 hours |
| Battery Charging Time | 10 hours |
| Battery Charging Temperature | +41°F to 104°F |
| Tripod Attachment | 5/8 x 11 horizontal and vertical |
| Warranty | 5 Years Laser |
| Dust and Waterproof | IP66 |
| Weight | 7.7 lbs including battery |
| Product Dimensions | 11.0 x 7.1 x 9.5 inch |
The FGC20 is a heavy-duty fiberglass elevator tripod designed specifically for excavator grade laser applications. The crank-up elevator center column adjusts from 40" to a fully extended 90" — giving you an additional 50" of vertical reach without touching the legs. That extra height is what gets the GL1425C laser up to the level needed to align with the machine receiver mounted on your excavator boom. Without an elevator tripod, the laser sits too low to maintain a proper signal path to the boom-mounted receiver, causing unreliable grade readings or no signal at all. Quick-clamp leg locks and 5/8×11 thread mount for direct GL1425C compatibility.
- ✓ Heavy-duty composite legs
- ✓ Elevator center column — cranks from 40" to 90" extended
- ✓ Quick-clamp leg locks
- ✓ 5/8 × 11 thread — fits GL1425C
- ✓ Adjusts height without moving legs
- ✓ Fast setup and breakdown
- ✓ Stable on uneven ground
- ✓ Built for daily contractor use
SitePro 11-816-C Aluminum 15-Foot Grade Rod — Feet & Inches — Included in This Kit
The SitePro 11-816-C is a professional-grade aluminum telescoping leveling rod built for accurate elevation readings and rugged daily use. Clearly marked Feet & Inches graduations are easy to read from a distance. Pairs perfectly with the GL1425C and LR50W receiver.
- • High-strength aluminum alloy
- • 15-foot telescoping sections
- • Feet & Inches graduations
- • Smooth, quiet section extension
- • Compatible with LR50W receiver
- • Easy-read graduations at distance
- • Lightweight for all-day carry
- • Built for daily jobsite use
Mounting Options — Included & Available Add-Ons
| Part # | Components | Remote |
|---|---|---|
| GL1425C-BCC | No Receiver with Case | NO REMOTE |
| GL1425C | HL760 Deluxe Receiver with C70 Receiver Adapter Carrying Case | RC1402 + BT App |
| GL1425C-14 | CR700 Multi Use Receiver with C70 Receiver Adapter and C71 Magnetic Mount | RC1402 + BT App |
| GL1425C-BL | LASER ONLY — No Receiver — No Case | NO REMOTE |
| GL1425C-NR | HL760 Deluxe Receiver with C70 Receiver Adapter | NO REMOTE |
| Part # | Includes | Remote |
|---|---|---|
| GL1425C-1 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Aluminum Tripod • 15’ Rod (10ths) • Large Case | RC1402 + BT App |
| GL1425C-2 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Aluminum Tripod • 15’ Rod (INCHES) • Large Case | RC1402 + BT App |
| GL1425C-16 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Standard Aluminum Tripod • 16’ Rod (10ths) • Small Case | RC1402 + BT App |
| GL1425C-17 | HL760 Premium Receiver • C70 Rod Adapter • Standard Aluminum Tripod • 16’ Rod (10ths) • Small Case | RC1402 + BT App |
| GL1425C-18 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Elevator Fiberglass Tripod • 16’ Rod (10ths) • Small Case | RC1402 + BT App |
| GL1425C-19 | HL760 Premium Receiver • C70 Rod Adapter • Elevator Fiberglass Tripod • 16’ Rod (10ths) • Small Case | RC1402 + BT App |
| GL1425C-26 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Standard Aluminum Tripod • 16’ Rod (INCHES) • Large Case | RC1402 + BT App |
| GL1425C-27 | HL760 Premium Receiver • C70 Rod Adapter • Standard Aluminum Tripod • 16’ Rod (INCHES) • Small Case | RC1402 + BT App |
| ► Dedicated Machine Receiver Packages ◄ | ||
| GL1425C-ExcavatorMAXX-1 | GL1425C+ LR50W Machine Receiver (w/ wireless in-cab display) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (INCHES) | BT App |
| GL1425C-ExcavatorMAXX-2 ← THIS PAGE | GL1425C+ LR50W-MM Machine Receiver (w/ wireless in-cab display, mag mount) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (INCHES) | BT App |
| GL1425C-ExcavatorMAXX-21 | GL1425C+ LR50 Machine Receiver (LED bar on receiver) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (INCHES) | BT App |
| GL1425C-EXCAVATORMAXX-22 | GL1425C+ LR50 Machine Receiver (LED bar on receiver) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (INCHES) | BT App |
| Specification | GL412N | GL422N | GL1425C | GL612N | GL622N | UL633 |
|---|---|---|---|---|---|---|
| Accuracy | 1/16-inch @ 100-ft | 10 arc seconds | |||||
| Operating Diameter | 2,600-feet | 2,600-feet | 4,000-feet | 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 | Dual | Single | Dual | — |
| Power Source | 4 x D-Cell | NiMH Rechargeable Battery Pack | — | |||
| Battery Life | 35 Hrs NiMH | 50 Hrs Alkaline | Typical 45 Hours | 35 Hrs NiMH | 40 Hrs Alkaline | — | ||
| Rotation Speed | 300, 600 rpm | 300, 600, 900 rpm | 300, 600, 750 rpm | 0 to 750 rpm | ||
| Water Resistance | Yes — IP66 | |||||
| Size L x W x H (inches) | 10.7 x 7.7 x 7.9 | 11 x 7.1 x 9.5 | 9.4 x 5.9 x 11 | |||
| Warranty | 5-Year | |||||
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