David White® — Dave White's SitePro • Lafayette, IN
● GREEN BEAM ONLY
IP55 SEALED
AUTO-ALIGN TECH
LD 320G-TR
Green Beam Laser Detector with Tracking
“Reads the beam. Feeds the grade. Front and back.”
PART# 47-LD320G-TR
● Green Beam Dedicated
1000 ft Range
4.25 in Capture
Front + Back LCD
Built-In Magnets
6-Hr Battery
⚠
GREEN BEAM ONLY — NOT compatible with red beam lasers
● Green Beam
⚡ Auto-Alignment
GREEN BEAM DETECTOR●
1000 FT RANGE●
FRONT + BACK LCD●
4.25 IN CAPTURE HEIGHT●
IP55 SEALED●
AUTO-ALIGNMENT TECHNOLOGY●
PART# 47-LD320G-TR●
FREE SHIPPING●
GREEN BEAM DETECTOR●
1000 FT RANGE●
FRONT + BACK LCD●
4.25 IN CAPTURE HEIGHT●
IP55 SEALED●
AUTO-ALIGNMENT TECHNOLOGY●
PART# 47-LD320G-TR●
FREE SHIPPING●
1000ft
Working Range
4.25in
Capture Height
IP55
Weather Rated
6hr
Battery Life
±70°
Reception Angle
What Makes It Special
The Green Beam Detector
Built for the Job.
The LD 320G-TR is a dedicated green beam laser detector engineered to pair directly with the David White LM130HVG and compatible green beam pipe lasers. Every feature is purpose-built for fast, accurate grade reading in field conditions.
⚡
Auto-Alignment Technology
Pairs with the LM130HVG to automatically align the laser beam to a desired grade without manual hunting. Point, activate, lock — no repeated cranking and checking. Saves significant setup time on every grading job.
☰
Front + Back LCD Display
Digital elevation readout on both the front and back of the detector. Read the display from grade rod position without rotating the unit. Within ±2 in (±50 cm) of on-grade, the display shows elevation offset in decimal inches, fractional inches, or millimeters.
↕
4.25 in Capture Height
A generous 4.25 inch (108 mm) detection window means less time searching for the beam. Slide the detector up the rod and it catches the green beam quickly — no fine hunting up and down. Critical on long shots where beam elevation uncertainty is higher.
■
IP55 Sealed Housing
Rated IP55 — protected against dust ingress and water jets from any direction. Handles concrete mist, rain, and muddy job sites. The rugged housing is built for daily construction use, not careful storage on a shelf.
▣
Built-In Side + Top Magnets
Strong built-in magnets on both the side and top of the housing. Mount the detector to a metal grade rod, pipe, or steel framing in seconds — no additional clamp hardware needed for steel surfaces. The included rod clamp covers wood/fiberglass rods.
⇄
Three Units of Measure
Switch between decimal inches, fractional inches, and metric millimeters at the touch of a button. Matches whatever your plans or crew prefer. Simultaneous LED indicators (green on-grade, red hi/low) give instant visual status from a distance.
Audio Guidance — 4 Levels
Audible beep tone guides you to on-grade. Four volume settings: Loud / Medium / Low / Off. Hear the tone change frequency as you approach grade — works even when you can’t see the display.
Loud
Medium
Low
Off
Technical Specifications
Every Spec.
Nothing Hidden.
Full datasheet specifications from David White. Part# 47-LD320G-TR. Detector only — sold as standalone replacement or spare.
● Green Beam Dedicated
⚡ Auto-Alignment
1000 ft Working Range
4.25 in Capture Height
IP55 Sealed
Front + Back LCD
4x AAA Alkaline
Side + Top Magnets
⚠ Compatibility Notice
This detector is calibrated for green beam lasers only. It will not reliably detect red beam rotary or pipe lasers. Verify your laser emits a green beam before ordering.
| Specification | Value |
|---|---|
| Beam Compatibility | ● Green Beam Lasers Only |
| Auto-Alignment Technology | ✓ Yes — pairs with LM130HVG |
| Detection Range | 4 ft to 1,000 ft (1 m – 300 m) |
| Capture Height | 4.25 in (108 mm) |
| Reception Angle | ±70° |
| LCD Display | Front AND Back (simultaneous) |
| Display Range | ±2 in (±50 cm) from on-grade |
| Units of Measure | Decimal in / Fractional in / Metric mm |
| LED Indicators | Green (On-Grade) + Red Hi / Red Low |
| Audio Guidance | Loud / Medium / Low / Off |
| Auto Shutoff | 15 minutes |
| Power Source | 4× 1.5V AAA Alkaline Batteries |
| Battery Life | Approx. 6 hours |
| Magnets | Built-in — side AND top |
| IP Rating | IP55 |
| Operating Temperature | 14°F to 122°F (−10°C to +50°C) |
| Dimensions | 155 × 74 × 28 mm |
| Weight (with battery) | 0.65 lb (0.28 kg) |
| Part Number (CT) | 47-LD320G-TR |
| Warranty — Detector | 1-Year Limited |
| Warranty — Accessories | 90-Day Limited |
Accuracy Modes — Three Sensitivity Levels
| Mode | Decimal (in) | Fraction (in) | Metric (mm) |
|---|---|---|---|
| Fine | 0.05 in | 1/16 in | 1.0 mm |
| Medium | 0.25 in | 1/8 in | 5.0 mm |
| Coarse | 0.50 in | 1/4 in | 10.0 mm |
Fine mode gives the tightest on-grade window for finish work. Coarse mode is preferred for earthwork and rough grading where a wider acceptance window speeds workflow.
In the Box
What’s Included
The LD 320G-TR ships as a detector-only unit — everything you need to start detecting, nothing you already have. Ideal as a standalone replacement detector or spare for contractors running multiple LM130HVG setups.
✓
LD 320G-TR Green Beam Laser Detector — the main unit, calibrated for green beam frequency
✓
Rod Clamp — attaches detector to grade rod or staff; built-in magnets also mount directly to metal surfaces
✓
4× AAA Alkaline Batteries — pre-installed and ready to go out of the box; approx. 6-hour runtime per set
Sold Separately
This is the detector only — the laser is not included. This listing is for contractors who need a spare, replacement, or additional detector for their existing LM130HVG or compatible green beam laser setup. If you need the complete laser kit, see the David White LM130HVG.
Compatibility
Works With These Lasers
The LD 320G-TR is tuned for green beam frequency. Confirm your laser emits green before ordering. Red beam lasers will not reliably trigger this detector.
Primary Pairing
ROTARY LASER
LM130HVG
Green Beam H+V Rotary Laser
The LD 320G-TR is the matched detector for the LM130HVG. Auto-Alignment Technology works only with this pairing. Full 1000-ft detection range, front+back display, and auto-grade locking.
View LM130HVG →
Kit Compatible
ROTARY LASER KIT
LM130HVGK-4C
LM130HVG Kit + 4-ft Grade Rod (inches)
The LM130HVGK-4C kit includes an LM130HVG plus a 4-foot grade rod graduated in inches. The LD 320G-TR detector is included in the kit — this listing is for spare/replacement use.
47-LM130HVGK-4C
Kit Compatible
ROTARY LASER KIT
LM130HVGK-4T
LM130HVG Kit + 4-ft Grade Rod (tenths)
The LM130HVGK-4T kit includes an LM130HVG plus a 4-foot grade rod graduated in tenths. Same compatibility — the LD 320G-TR is the correct detector for this kit as well.
47-LM130HVGK-4T
🔎
Also Compatible: Leica Piper 100 & Piper 200 Series Pipe Lasers
Per David White SitePro documentation, the LD 320G-TR is also compatible with Leica Piper 100 and Piper 200 series green beam pipe lasers for sewer and drainage work. Contact us at 877-866-5721 to confirm compatibility with your specific laser.
✗
Not Compatible: Red beam rotary lasers (including LM130HV, LM110H, and any red beam instrument). This detector is green beam frequency only. Using a red beam laser with this detector will result in unreliable or no detection.
● Green Beam Detector — Part# 47-LD320G-TR
The Right Detector.
For the Green Beam.
Spare detector. Replacement detector. Additional unit for a multi-person crew.
Whatever the need — this is the one built for your LM130HVG.
Questions? A real person answers at 877-866-5721.
Family-owned & operated · Free shipping · Same-day shipping available · Part# 47-LD320G-TR
