Spectra HR320 vs Topcon LS-80A Receiver: Which Laser Receiver Wins?
Quick Answer
Before selecting between these instruments, use Gradelog's free field calculators to verify your project requirements — grade percentage, cut and fill, elevation, slope, and more. No account required.
If you're running grade stakes on a busy site, you know your laser receiver better be tough and accurate. I've beaten up both the Spectra HR320 and Topcon LS-80A on everything from highway cuts to subdivisions. Here's how these receivers stack up when you're actually out there getting elevations.
See also: Topcon RL-H5A vs RL-H5B: What's the Difference and Which Sho
Quick Specs Comparison
| Feature | Spectra HR320 | Topcon LS-80A |
|---|---|---|
| Accuracy | ±1/16" (±2mm) | ±1/16" (±1.5mm) |
| Detection Range | Front: 394 ft (120m) diameter | Front: 492 ft (150m) diameter |
| Back Display | Yes (rear LCD) | Yes (dual-sided) |
| Remote Display | Yes (RF wireless, 328 ft range) | No (must read from receiver) |
| Channels | 4 selectable channels | 2 selectable channels |
| Audio Alerts | Variable tone | Variable tone + vibration |
| Battery Life | 60+ hours (4 D-cell alkaline) | 100+ hours (4 D-cell alkaline) |
| Clamp Compatibility | Fits excavator/dozer masts | Fits excavator/dozer masts |
| IP Rating | IP67 (dust/water resistant) | IP67 (dust/water resistant) |
| Weight | 2.2 lbs (1.0 kg) with batteries | 2.4 lbs (1.1 kg) with batteries |
| Typical Price | $950-$1,150 | $1,200-$1,400 |
Spectra HR320: The Wireless Wonder
The HR320's killer feature is that RF remote display. When you're running blade on a big dozer and the receiver's eight feet up on the mast, you don't want to be climbing up there every time you need to check grade. The remote clips to your belt or sits in the cab, shows you exactly what the receiver sees up to 328 feet away.
Four channels means you can run multiple lasers on the same site without interference—real handy on big jobs where you've got different crews working different areas. The front detection range of 394 feet handles most grading work fine, though you might push that limit on really open sites.
Battery life's decent at 60+ hours. I usually get a solid week out of a set of batteries running grade all day. The IP67 rating means it laughs off mud splatter and rain—I've had mine caked in clay and it keeps ticking.
Topcon LS-80A: The Long-Range Champ
The LS-80A gives you nearly 500 feet of detection range, which is clutch when you're working long highway grades or big parking lots. That extra 100 feet of range over the HR320 makes a difference when your laser's set up far from where you're cutting.
Topcon's MMR (Millimeter Receiver) technology is genuinely accurate—that ±1.5mm spec isn't marketing fluff. When you're trying to nail finish grade within a gnat's ass, you'll appreciate it. The dual-sided display's bright and easy to read from either side of the receiver.
The vibration alert is money when you're in a noisy machine—you can feel when you're on grade even if you can't hear the beeps. Battery life's outstanding at 100+ hours. Downside? No wireless remote, so you're reading grade right off the receiver or having a grade checker call it out to you.
The Verdict: Which Receiver for Your Work?
Go with the Spectra HR320 if: You're running big equipment where the receiver's mounted high and you want to monitor grade from the cab. The wireless remote is a genuine back-saver, and four channels give you flexibility on multi-crew sites. You'll save $200-$300 versus the Topcon and still get solid accuracy for 99% of grading work.
Go with the Topcon LS-80A if: You need maximum range and ultimate accuracy. That extra 100 feet of detection handles big open sites better, and the longer battery life means fewer battery swaps. The vibration alert's great for noisy conditions, and Topcon's reputation for bulletproof reliability is earned. Worth the premium if you're doing precision finish work.
Bottom line: Both receivers are workhorses that'll take a beating. The HR320 wins on convenience and value with that wireless remote. The LS-80A wins on range, battery life, and precision. For general earthwork and grading, I'd grab the HR320 and pocket the savings. For finish grading and long-range work, the LS-80A's worth the extra cash.
Frequently Asked Questions
Are these receivers compatible with any rotating laser?
Both receivers work with red beam rotating lasers from any manufacturer. The HR320 has four selectable channels to match your laser's frequency, while the LS-80A has two channels. Just make sure your laser and receiver are set to the same channel. They'll pick up Spectra, Topcon, Leica, Trimble—pretty much any standard rotating laser.
Can I use the HR320's remote display with gloves on?
Yeah, the remote's buttons are big enough to work with most work gloves. The display's backlit so you can read it in low light. Just keep the remote dry—it's weather-resistant but not waterproof like the receiver itself. I keep mine in a plastic sandwich bag when it's really nasty out.
How do the clamps mount on excavator stick?
Both receivers come with rod clamps that fit standard grade rods. For excavator or dozer mounting, you'll need a machine-specific mounting bracket (sold separately). Most guys use magnetic mounts or bolt-on brackets depending on the machine. The receivers themselves clamp into universal receiver holders that attach to those mounts.
What's the real-world battery life if I'm using the remote on the HR320?
The receiver itself still gets 60+ hours. The remote uses a separate rechargeable battery that'll go about 40 hours on a charge. I charge the remote overnight and it's good for a full week of work. Keep a spare remote battery in your truck if you're running long days—they're cheap insurance.
