Self-Leveling Rotary Laser
One Person. On Grade. All Day.
Grade in tenths of a foot and the arithmetic stops fighting you. Cut and fill come straight off the plans, the numbers add the way a calculator expects, and nobody is converting sixteenths in their head at the back of a trench. The Spectra Precision LL300N-1 is built around that: a self-leveling rotary laser, the HL450 Laserometer receiver, the GR151 15-foot rod graduated in tenths, the Q104025 tripod and the hard case that carries the lot.
Set the laser on its tripod, give it about half a minute to find level, and it holds a plane you can work off all day — accurate to 3/32-inch at 100 feet across a 1,650-foot spread, or roughly 1,300 feet with the HL450 that comes in the box. Footings, forms, pads, sub-grade, drainage falls, pond bottoms, driveways: if it needs an elevation held over distance, this is the tool, and one person runs it.
Spectra did not build it delicately. A “hard hat” rotor guard covers the spinning head, it takes a 3-foot drop onto concrete or a 5-foot fall off a knocked tripod. 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. An IP66 seal means rain, dust and washdown are non-events. Four D-cells run it 90 hours — a fortnight of real days. Five year warranty on the laser, three on the receiver.
Slope is available but worth stating plainly, because the listings get it wrong: you need the optional RC601 remote. There are no slope controls on the laser itself, and manual slope means you tilt the beam and check it with the receiver — there is no field to type a grade percentage into. If you need an exact number dialled in, that is an automatic slope laser, and we would rather tell you that now.
It all travels in the 5289-0027 All in One system case, cut with a pocket for each piece, so the laser, the HL450, the rod sections and the tripod legs each have a home.
Grab your case and know you have everything, ready to go to work.
Two Things People Get Wrong.
The LL300N-1 ships the GR151 — 15 ft, five section, graduated in TENTHS. If you read grade in feet and inches, you want the LL300N-2 — identical kit, inches rod. 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.
GR151 Grade Rod — TENTHS
15 ft, five section aluminum, graduated in tenths. The reason this kit is the “-2”.
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 YOU ARE HERE | 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 | 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-1 come with a tenths rod or an inches 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-1 reach?
Does the LL300N-1 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-1?
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 tenths — your replacement is the GR151 or the SitePRO 11-815-T. The inches 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.
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5 Great option for us
Posted by Silverado Excavating Company Sparks, NV on 20th Jun 2017
For our small site grading crews this LL300 kit is a god send. Everything the crews need in a well designed box, keeps legs and grade rods from getting beat up, and is very durable.
