Self-Leveling Rotary Laser
One Person. On Grade. All Day.
The Spectra Precision LL300N-3 is a complete grade-checking outfit that works the day it arrives — nothing else to buy, nothing to source separately. It pairs the LL300N rotary laser with the HL450 Laserometer receiver, a GR153 16 ft grade rod marked in metric, the Q104025 aluminum tripod and the hard case that carries all of it.
Accuracy is 3/32-inch at 100 feet, and the laser transmits across a 1,650-foot diameter — with the HL450 in this kit you will reliably pick it up to around 1,300 feet. That covers the work most crews actually do: setting and checking elevations, concrete forms, footings and foundations, excavation and cut-and-fill, septic and drainage, driveways, ramps and pads. One person sets grade and keeps working.
The housing is built to be dropped, because it will be. A “hard hat” rotor guard shields the spinning head, and the unit is rated to survive a 3-foot drop straight onto concrete or a 5-foot fall when the tripod goes over. Spectra are clear about what to do next, and so are we: after any drop, re-check the leveling accuracy before you carry on — the procedure is in the user guide, two walls 65 ft apart and four readings. Sealed to IP66, it shrugs off rain, dust and washdown. That is fewer trips to the repair bench and a laser that is still worth something in five years — which is exactly how long Spectra warrant it.
Self-leveling is fully automatic and takes about thirty seconds, and the four D-cell alkaline batteries in the box run it for 90 hours. Slope is available but it is worth being precise about: with the optional RC601 remote you get single cross-axis manual slope while the other axis keeps self-leveling — enough for driveways, ramps and basic grade matching. There are no slope controls on the laser itself, and manual slope is not the same as keying in a percentage. If you need to dial an exact grade, you want an automatic slope laser instead.
Everything travels in the 5289-0027 “All in One” system case — a large hard case cut with a dedicated pocket for each piece, so the laser, the HL450, the rod sections and the tripod legs all have a place. Nothing rattles loose in the truck, nothing goes missing between jobs, and at the end of the day it all packs back down the way it came out.
Grab your case and know you have everything, ready to go to work.
Two Things People Get Wrong.
The LL300N-3 ships the GR153 — 16 ft, five section, graduated in METRIC. If you read grade in feet and inches, you want the LL300N-2; in tenths of a foot, the LL300N-1. Same kit either way — only the rod changes. Getting this wrong is the most common reason one of these comes back.
Out of the case this is a self-leveling horizontal laser. There are no slope controls on the face of the laser at all — the arrow keys that tilt the beam exist only on the remote. Add the RC601 and you get manual slope on both axes. And manual slope is not the same as typing in a grade.
What You Receive.
LL300N Laser
Automatic self-leveling rotary laser. 600 rpm, ±5° self-leveling, IP66, five year warranty.
HL450 Receiver
Digital readout receiver with C45 rod clamp. Three accuracy settings, 4 inch capture height, IP67, three year warranty.
GR153 Grade Rod — METRIC
16 ft, five section aluminum, graduated in metric. The reason this kit is the “-3”.
Q104025 Tripod
Medium duty aluminum, 5/8 x 11 threaded post. The only tripod that fits inside the case — which is why it ships with it.
5289-0027 All in One System Case
Purpose-built hard case with a cut pocket for every component.
Grab your case and know you have everything, ready to go to work.
Four D-Cell Alkaline Batteries
90 hours of rotation. Rechargeable NiMH and a charger are available as an upgrade — see below.
The Case Is Half the Kit.
This kit ships the 5289-0027 — the LARGE All in One system case, not a small case and not a soft bag. It is cut with a dedicated pocket for every piece: the laser, the HL450, the rod sections and the tripod legs.
Grab your case and know you have everything, ready to go to work.
Where This Laser Earns Its Keep.
Full Specification.
| Specification | LL300N |
|---|---|
► ACCURACY & RANGE | |
| Leveling accuracy | ±3/32 inch at 100 ft (±2.2 mm at 30 m) — ±15 arc seconds |
| Working diameter | The laser transmits to 1,650 ft (500 m). With the HL450 in this kit, expect reliable detection to about 1,300 ft (400 m) — a more sensitive receiver reaches further. |
| Self-leveling range | ±5° electronic servo self-leveling |
| Leveling time | approx. 30 seconds |
► LASER & ROTATION | |
| Rotation speed | 600 rpm |
| Laser type / class | 635 nm, Class 2, < 3.4 mW |
| Beam diameter | approx. 8 mm at the laser |
► POWER | |
| Power source | 4 x D-cell alkaline (included) or optional NiMH rechargeable batteries |
| Battery life | 90 hours alkaline / 45 hours NiMH |
► BUILT TO BE DROPPED | |
| Environmental rating | IP66 — dust tight, protected against powerful water jets |
| Drop rating | 3 ft onto concrete · 5 ft tripod tip-over |
| Operating temperature | -4 °F to 122 °F (-20 °C to 50 °C) |
► PHYSICAL | |
| Tripod mount | 5/8 x 11, horizontal and vertical |
| Dimensions | 10.7 x 7.7 x 7.9 in (27.2 x 19.7 x 20.1 cm) |
| Weight | 5.9 lb (2.7 kg) bare — 6.8 lb (3.1 kg) with the four D-cells |
► WARRANTY | |
| Warranty | 5 years laser · 3 years HL450 receiver |
What the HL450 Tells You.
Every receiver tells you high, on or low by tone — a slow beep when you are high, a fast beep when you are low, a constant tone when you are on grade. That gets you to the right elevation eventually, by hunting. The HL450 adds the number: it shows you how far off grade you are and in which direction, so you move once instead of creeping up on it. That is the difference between chasing grade and setting it.
This trips people up, and most listings only quote one of them.
Capture height is 4 inches (102 mm). That is the size of the detection window — the span over which the HL450 will see the beam at all and tell you which way to move. It is why you can find the beam quickly instead of hunting up and down the rod.
The numeric readout works over 3 inches. Within that 4-inch window, the display gives you an actual measurement across 1.5 inches above grade and 1.5 inches below. Inside that band you are not guessing — you are reading how much to cut or fill. Outside it, you still get direction arrows, just not a number.
You choose the units. The readout is switchable — millimetres, centimetres, feet and inches, or fractional inches. Set it to whatever the plans are drawn in and read grade in that language all day, instead of converting in your head on the rod.
Practically: get the receiver anywhere in the window and it points you the right way. Get it within an inch and a half and it starts telling you exactly how far.
All of which is why one person can set grade with this kit. You are not holding a rod for somebody looking through an instrument — you are standing at the rod reading the number yourself, and you can move, re-shoot and check as often as you like.
You are HIGH — come down
ON GRADE — stop
You are LOW — come up
| Working radius | 3–650 ft (1–200 m) |
| Capture height | 4 inches (102 mm) |
| Smart reading height | 3 inches total — 1.5 inches above grade, 1.5 inches below |
| Deadband | 1/64 – 1/4 in (0.5–10 mm) |
| Accuracy settings | 3 |
| Power / life | 2 x AA alkaline, 60+ hours |
| Auto shut off | 30 minutes to 24 hours |
| Rating | IP67 |
| Warranty | 3 years |
Slope, and What It Actually Means.
The LL300N is slope capable — but only with the optional RC601 remote. There are no slope controls on the face of the laser: the panel has a power button, a manual button and three indicator lights, and nothing on the housing tilts the beam.
Red LED flashing once a second. Y tilts on the remote’s up/down arrows, X on left/right.
Red and green both flashing. Y tilts from the remote while X keeps self-leveling — ramps and driveways.
Unlocks manual slope on both axes plus Single Slope mode. Infrared — no pairing, no channels. Works to about 100 ft with line of sight.
High-capacity 10,000 mAh NiMH D-cells with a 110 V charger. Stop buying D-cells — charge overnight in the truck instead.
Which LL300N Do You Need?
Every kit below uses the same LL300N laser. What changes is the rod scale, the receiver, the tripod and whether a remote or rechargeable batteries are included. They are grouped by rod scale, because that is the choice that actually matters — and the one that causes returns.
| Kit | Receiver | Rod | Also includes | Price |
|---|---|---|---|---|
► LARGE “ALL IN ONE” SYSTEM CASE | ||||
READS IN INCHES | ||||
| LL300N-2 | HL450 BETTER | INCHES | TRIPODSYSTEM CASE | $1,084.85 |
| LL300N-CR72 | CR700 BEST | INCHES | TRIPODSYSTEM CASE | $1,395.00 |
| LL300N-2-PROMAG | CR700 BEST | INCHES | REMOTERECHARGEABLETRIPODSYSTEM CASE | $1,575.00 |
READS IN TENTHS OF A FOOT | ||||
| LL300N-1 | HL450 BETTER | TENTHS | TRIPODSYSTEM CASE | $1,084.00 |
| LL300N-CR71 | CR700 BEST | TENTHS | TRIPODSYSTEM CASE | $1,395.00 |
| LL300N-1-PROMAG | CR700 BEST | TENTHS | REMOTERECHARGEABLETRIPODSYSTEM CASE | $1,595.00 |
METRIC | ||||
| LL300N-3 YOU ARE HERE | HL450 BETTER | Metric | TRIPODSYSTEM CASE | $1,084.00 |
► SMALL CASE | ||||
READS IN INCHES | ||||
| LL300N-82 | HR320 GOOD | INCHES | HD TRIPODSMALL CASE | $985.00 |
| LL300N-X2 | HL450 BETTER | INCHES | HD TRIPODSMALL CASE | $1,095.00 |
| LL300N-X2 PRO | HL450 BETTER | INCHES | REMOTERECHARGEABLEHD TRIPODSMALL CASE | $1,295.00 |
| LL300N-X22 | HL760 BEST | INCHES | HD TRIPODSMALL CASE | $1,295.00 |
| LL300N-X22 PRO | HL760 BEST | INCHES | REMOTERECHARGEABLEHD TRIPODSMALL CASE | $1,445.00 |
READS IN TENTHS OF A FOOT | ||||
| LL300N-81 | HR320 GOOD | TENTHS | HD TRIPODSMALL CASE | $985.00 |
| LL300N-X1 | HL450 BETTER | TENTHS | HD TRIPODSMALL CASE | $1,095.00 |
| LL300N-X1 PRO | HL450 BETTER | TENTHS | REMOTERECHARGEABLEHD TRIPODSMALL CASE | $1,295.00 |
| LL300N-X11 | HL760 BEST | TENTHS | HD TRIPODSMALL CASE | $1,295.00 |
| LL300N-X11 PRO | HL760 BEST | TENTHS | REMOTERECHARGEABLEHD TRIPODSMALL CASE | $1,445.00 |
KITS WITH NO ROD AND TRIPOD | ||||
| LL300N-8 | HR320 GOOD | — | SMALL CASE | $935.00 |
| LL300N | HL450 BETTER | — | SMALL CASE | $964.00 |
| LL300N-4 | HL450 BETTER | — | RECHARGEABLESMALL CASE | $1,045.00 |
| LL300N-PRO | HL450 BETTER | — | REMOTERECHARGEABLESMALL CASE | $1,195.00 |
| LL300N-7 | HL760 BEST | — | SMALL CASE | $1,048.00 |
► LASER AND CASE ONLY — NO ROD, NO TRIPOD | ||||
| LL300N-BCA | — | — | SMALL CASE | $694.40 |
| LL300N-BCC | — | — | RECHARGEABLESMALL CASE | $792.00 |
Not sure? Call 1-877-866-5721. We would rather spend two minutes on the phone than process a return.
See It Work.
►► PLAYING
Basic Functions with the RC601 RemoteWalkthrough of the LL300N controls, and what the RC601 adds — manual mode, single slope and the arrow keys.
►► PLAYING
Drop Test & Water Resistance DemoThe 3-foot drop onto concrete and the water test — what IP66 and the “hard hat” rotor guard actually mean.
LL300N Questions We Actually Get.
Does the LL300N-3 come with a metric rod?
Is the Spectra LL300N slope capable?
There are no slope controls anywhere on the face of the laser. The panel has two buttons, power and manual, plus three indicator lights. The manual button takes the laser out of automatic self-leveling, but nothing on the housing tilts the beam. The arrow keys that set slope exist only on the RC601.
With the remote you get two modes. In Manual mode both axes tilt — Y on up/down, X on left/right. In Single Slope mode Y slopes from the remote while X keeps self-leveling, which is how ramps and driveways are set.
What you do not get is automatic slope. There is no way to key a grade percentage into an LL300N.
What is Manual mode on the LL300N, and what does it actually do?
Normally the laser is in automatic self-leveling: it finds level on its own, then keeps checking and re-correcting every few seconds so the plane stays level all day. Put it in Manual mode and it stops doing that. It holds whatever attitude you give it, so when you tilt the beam with the remote’s arrow keys, it stays tilted instead of quietly levelling itself back out.
Read the LEDs to know which mode you are in:
• Green flashing — automatic self-leveling. Normal level work.
• Red flashing — Manual mode. Self-leveling is off, both axes tilt from the remote.
• Red and green both flashing — Single Slope mode. The Y-axis tilts from the remote, the X-axis keeps self-leveling.
The thing to watch: in Manual mode the laser will not fix itself. If the tripod gets bumped or settles, the beam moves with it and nothing corrects it back — so re-check your grade against a benchmark before you trust it. That protection is exactly what you gave up to get slope. Press the manual button again to come back to automatic, and the green LED tells you it is watching itself once more.
What do the LL300N’s LED lights mean? (full list)
| LED | State | What it means |
|---|---|---|
| All three, 3 sec | Powering up | Leveling, manual/HI and battery indicators all light for about three seconds at switch-on, then self-leveling begins on its own. |
| Green, 1×/sec | Self-leveling | The laser is finding level. The head will not spin until it gets there. Takes about 30 seconds. |
| Green, solid | Level, first 5 min | It found level. Solid for roughly five minutes after self-leveling completes. |
| Green, every 4 sec | Level, working | Settled and self-checking. This is the normal working state — the occasional blink is the laser telling you it is still level. |
| Green + red together + warning tone | Out of range | You have set it up beyond its ±5° (±8%) self-leveling range. It cannot compensate. Re-level the tripod head and it will pick up. |
| Red, 1×/sec | Manual mode | Self-leveling is OFF. Both axes tilt from the remote’s arrow keys. The laser will not correct itself if it is disturbed. |
| Red + green, 1×/sec | Single Slope mode | Y-axis tilts from the remote, X-axis keeps self-leveling. The setup for ramps and driveways. |
| Red, 2×/sec + tone, beam off | HI alert | Height of instrument changed. Something knocked the setup and the beam moved more than about 30 mm at 10 m. The head stops and the beam shuts off so you cannot shoot off a bumped laser. Power off and on, then re-check your elevation against a benchmark. |
| Battery, slow flash | Low battery | Voltage is dropping. It will shut itself off rather than drift out of tolerance on dying cells. |
The short version: green means the laser is looking after itself, red means it is not, and red flashing twice a second means stop and re-check your grade.
What do the beeps on the HL450 mean?
• Slow beep — you are HIGH. Come down.
• Fast beep — you are LOW. Come up.
• Constant tone — you are ON GRADE. Stop.
The HL450 does this by tone and by the digital readout. It has no coloured grade lights — those are on the deluxe receivers, the HL760 and the CR700. What the HL450 gives you instead is the number: how far off you are, to 1/64 inch on the fine setting, so you can move straight to grade rather than hunting for the constant tone.
Can I enter a slope percentage such as 5% on the LL300N?
How do I pair the RC601 remote to the LL300N?
How far away will the optional RC601 remote work?
How far will the Spectra LL300N-3 reach?
Does the LL300N-3 kit come with rechargeable batteries?
I dropped my LL300N. Is it still accurate?
The check takes about five minutes and needs two walls roughly 65 ft (20 m) apart. Set up near wall A, let it self-level, mark the beam on wall A. Turn the unit 180°, let it level, mark wall B. Move the laser near wall B and repeat both marks. Within working accuracy the difference across that 40 m round trip should be no more than about 4 mm (3/16 inch). Repeat for the other axis. The full procedure with diagrams is in the user guide linked below.
If it is out, stop using it for grade work and call us on 1-877-866-5721.
Can the Spectra LL300N be left out in the rain?
What does the HL450 receiver tell me?
Can the LL300N be used vertically for plumb and wall layout?
My LL300N will not self-level, or it started rotating immediately. What is wrong?
The laser stopped, the beam went off and it beeped. What happened?
The head is spinning but my receiver will not pick up the beam.
My grade reads differently than it did earlier and nothing was moved. Why?
My LL300N will not turn on, or it shuts itself off during the day.
Important: never take the rechargeable pack out of its holder and put alkaline cells in that holder. A mechanical switch is what stops alkalines being charged — defeat it and attempting a charge will severely damage the laser.
Self-leveling is slow, or it never finishes leveling.
Two receivers on the same laser give different readings.
How long is the warranty on the LL300N-3?
Reading the Lights.
The LL300N tells you everything through three indicators — a green leveling light, a red manual/HI warning light and a battery light. The dots below blink at the actual rates, so you can match what you are looking at on the jobsite.
| Indicator | State | What it means |
|---|---|---|
| Powering up | All three light for about three seconds at switch-on, then self-leveling starts on its own. | |
| Self-leveling | Finding level. The head will not spin until it gets there — about 30 seconds. | |
| Level — first 5 min | It found level. Solid for roughly five minutes after self-leveling completes. | |
| Level — working | Settled and self-checking. The occasional blink is the laser telling you it is still level. This is what you want to see all day. | |
| Out of range | Set up beyond the ±5° (±8%) self-leveling range, with a warning tone. It cannot compensate — re-level the tripod head and it will pick up. | |
| Manual mode | Self-leveling is OFF. Both axes tilt from the remote’s arrow keys. The laser will not correct itself if it gets disturbed. | |
| Single Slope mode | Y-axis tilts from the remote, X-axis keeps self-leveling. The setup for ramps and driveways. | |
| HI alert — stop | Twice a second, with a tone, and the beam shuts off. Something moved the setup more than about 30 mm at 10 m. Power off and on, then re-check your elevation against a benchmark before you trust another reading. | |
| Low battery | Voltage dropping. It will shut itself off rather than drift out of tolerance on dying cells. |
The short version: green means the laser is looking after itself, red means it is not, and red blinking twice a second means stop and re-check your grade.
Only These Fit the Case.
Rods and tripods take the worst of it. The 5289-0027 system case is cut to fit specific ones — replace with the wrong part and it will not go back in the case.
This kit reads in metric — your replacement is the GR153. The inches and tenths rods fit the case just as well, but they change how you read grade.
Where the LL300N Sits.
Spectra's own comparison of the horizontal laser range. Every model name links to that laser on our site. The LL300N is the workhorse of the line — if you need longer range or vertical work, the columns to the right are where you go.
► LASER LEVELS |
► HORIZONTAL & VERTICAL | ||||
| LL300N THIS LASER | LL1505C | LL500 | HV1305C | HV1305GC | |
|---|---|---|---|---|---|
| Accuracy | 3/32 inch @ 100 ft 2.2 mm @ 30 m (15 arc seconds) | 1/16 inch @ 100 ft 1.5 mm @ 30 m (10 arc seconds) | 1/16 inch @ 100 ft 1.5 mm @ 30 m (10 arc seconds) | 1/16 inch @ 100 ft 1.5 mm @ 30 m (10 arc seconds) | 1/16 inch @ 100 ft 1.5 mm @ 30 m (10 arc seconds) |
| Laser type / class | 639 nm Class 2 | 639 nm Class 2 | 670 nm Class 2 | 639 nm Class 3A/3R | 520 nm Class 3A/3R |
| Operating diameter | 1,650 ft (500 m) | 4,000 ft (1,200 m) | 1,650 ft (500 m) | 4,000 ft (1,200 m) | 4,000 ft (1,200 m) |
| Self-leveling range | ±5° electronic servo | ±5° electronic servo | ±11 minutes | ±5° electronic servo | ±5° electronic servo |
| Power source | 4 × D-cell NiMH standard, alkaline backup | 4 × D-cell NiMH standard, alkaline backup | 4 × D-cell NiMH standard, alkaline backup | 4 × D-cell NiMH standard, alkaline backup | 4 × D-cell NiMH standard, alkaline backup |
| Battery life | 90 hrs alkaline 45 hrs NiMH | 50 hrs NiMH | 175 hrs alkaline 100 hrs NiMH | 45 hrs NiMH | 35 hrs NiMH |
| Water resistance | IP66 | IP66 | IP54 | IP66 | IP66 |
| Size L × W × H | 10.7 × 7.7 × 7.9 in | 11.02 × 7.09 × 9.45 in | 10.8 × 7.5 × 7.5 in | 11.02 × 7.09 × 9.45 in | 11.02 × 7.09 × 9.45 in |
| Weight | 6.8 lbs (3.1 kg) | 7.7 lbs (3.49 kg) | 8 lbs (3.6 kg) | 7.7 lbs (3.49 kg) | 7.7 lbs (3.49 kg) |
Source: Spectra Precision product catalog, laser specifications table. HV101 omitted — discontinued.
Manuals and Documentation.
What Buyers Say.
These are verified reviews left by people who bought this exact kit from us — not aggregated from anywhere else.
Read every review → · Questions first? Call 1-877-866-5721.
