with 4 Inch Capture
as a Number.
The Spectra Precision HL450 Laserometer is a digital readout laser receiver for levelling and alignment with any rotating red-beam laser. Where a basic receiver only beeps high, low or on grade, the HL450 puts a number on the screen telling you exactly how far off grade you are — so you can read a cut or fill without chasing on-grade first.
It detects the beam across a 4 inch (102 mm) window, displays grade on LCDs front and back, gives you three selectable precision levels from 1/16 inch to 1/4 inch, and runs over 70 hours on two AA batteries. IP67 sealed, so a concrete splash or a puddle is a hose-down, not a repair.
Out of the Box.
The HL450 ships complete with the C45 rod clamp, so you can mount it on a grade rod the day it arrives. Already own a bracket? See the HL450-BR further down — same receiver, no clamp, lower price.
- HL450 Laserometer receiver with 4 inch reception height
- C45 rod clamp
- 2 × AA batteries
- Operating manual
Explains Properly.
Receiver listings quote one height. The HL450 has two, and the difference is the whole point of a digital readout receiver.
| Measurement | HL450 | What it means on the rod |
|---|---|---|
| Total laser detection height | 102 mm (4 inches) | The full window the receiver can see the beam in. Anywhere in these 4 inches you get proportional arrows telling you which way to move. |
| Numeric readout height (smart readings) | 76 mm (3 inches) | The middle band where the receiver shows an actual number — how far above or below grade you are, to ±40 mm (±1.5 inches), in millimetres, feet and inches or fractional inches. |
Why it matters. With a basic receiver you slide up and down the rod until it beeps, then read the rod. With smart readings you catch the beam anywhere in the 4 inch window and the display tells you the cut or fill directly. Fewer trips up the rod, and you can estimate material before you move any.
Readings display in millimetres, centimetres, feet and inches, or fractional inches — whichever your job runs in — on the front and the rear LCD.
Anti-Strobe Sensor.
SuperCell reception window. The HL450 reads the beam across a single 4.0 inch (102 mm) SuperCell window rather than a short strip. A taller window means you catch the beam sooner, hold it longer, and spend less of the day sliding the receiver up and down the rod hunting for it — and used vertically, it gives you more control on tilt-up and curtain wall alignment.
Anti-strobe sensor. Hazard strobes on plant and vehicles throw light that a plain receiver will happily read as a laser strike, and a false strike means a false grade. The HL450’s anti-strobe sensor reduces false indication from strobe lights, so the reading you get is the laser and nothing else. The HR320 has no equivalent.
Self-calibrating, with a bubble vial on board. The HL450 checks its own calibration, and a built-in bubble vial helps you keep it level while you read it — so you are not sending it away to find out whether it still reads true.
the HL450.
| Detection and readout | |
| Total laser detection height | 102 mm (4 inches) |
| Numeric readout height — smart readings | 76 mm (3 inches) |
| Numeric display range | ±40 mm / ±1.5 inches from on-grade |
| Reception window | SuperCell, 4.0 inches / 102 mm |
| Display | Large LCD front and back — the rear repeats the front |
| Units of measure | Millimetres, centimetres, feet and inches, fractional inches |
| Reception angle | ±45° minimum |
| On-grade positions | 1 |
| Accuracy | |
| Precision levels | 3 selectable dead-bands |
| Fine | 1.0 mm / 0.05 inches / 1/16 inch |
| Medium | 5.0 mm / 0.20 inches / 1/4 inch |
| Calibration | 0.1 mm / 0.01 inches / 1/64 inch |
| Self-calibrating | Yes |
| Bubble vial | Built in, helps keep the receiver level |
| Anti-strobe sensor | Yes — reduces false indication from strobe lights |
| Marking notch | 3.15 inches / 80.0 mm from the top |
| Range and compatibility | |
| Working radius | 1–200 m (3–650 feet), laser dependent |
| Detectable spectrum | 610 nm – 900 nm |
| Laser compatibility | Any rotating laser in the red spectrum |
| Anti-strobe sensor | Patented filter rejects false strikes from LED and hazard strobes |
| Power, sound and environment | |
| Power supply | 2 × 1.5 volt AA batteries |
| Battery life | 70+ hours |
| Automatic shut-off | 30 minutes |
| Volume settings | 3 — Loud 100+ dBA, Low 65 dBA |
| Environmental rating | IP67 — waterproof and dust-proof |
| Drop rating | 5 feet (1.5 m) onto concrete |
| Warranty | 3 years limited — 2 years free exchange, a fee applies in the 3rd year |
| Operating temperature | −20 °C to +60 °C (−4 °F to +140 °F) |
| Storage temperature | −40 °F to +158 °F |
| Dimensions without clamp | 168.0 × 76.0 × 36.0 mm (6.6 × 3.0 × 1.4 inches) |
| Weight without clamp | 371 g (13.1 ounces) |
Specifications from Spectra Precision, taken from the HL450 user guide and the laser receiver brochure. The drop rating is the one in Spectra’s model-specific comparison table, which lists the HL450 at 5 feet (1.5 m); the 10 foot figure quoted in the range brochure carries the footnote “based upon models” and applies to the HL700 and HL760.
Receiver We Sell.
Every Spectra receiver we stock as a standalone unit, side by side. The HL450 is the entry point to digital readout — the first model in the range that gives you a number instead of just a beep.
Coming off an HR320? The HL450 is the step up crews normally take: double the reception height, and it reads out the distance instead of only pointing you at it. Not sure which suits your work? Call us on 1-877-866-5721 — we will get you on the right one.
| HR320 | HL450 | HL700 | HL760 | HL760U | CR700 | |
|---|---|---|---|---|---|---|
| Reception height | 2 inches | 4 inches | 5 inches | 5 inches | 5 inches | 5 inches |
| Numeric readout | ✕ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Readout height — smart readings | — | 3 inches | 4 inches | 4 inches | 4 inches | 4 inches |
| Precision levels | 2 | 3 | 6 | 6 | 6 | 6 |
| Working radius | 500 feet | 650 feet | 1,500 feet | 1,500 feet | 1,500 feet | 1,500 feet |
| Beam colour | Red | Red | Red | Red | Red + green | Red |
| Front and back LCD | ✓ | ✓ | ✓ | ✓ | ✓ | † |
| Anti-strobe sensor | ✕ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Self-calibrating | ✕ | ✓ | ✓ | ✓ | ✓ | † |
| Machine mountable | ✕ | ✕ | ✕ | ✕ | ✕ | ✓ |
| Radio communication | ✕ | ✕ | ✕ | ✓ | ✓ | ✓ |
| Drop rating | 5 feet | 5 feet | 10 feet | 10 feet | 10 feet | 10 feet |
| Warranty | 3 year limited 2 years free |
3 year limited 2 years free |
3 years free | 3 years free | 3 years free | 3 years |
Sources: Spectra Precision Laser Receiver Brochure comparison table and Spectra model specifications. Precision levels count all three selectable dead-bands, one of which is a calibration setting. For current pricing, follow the link on any model above. The HL750 is not listed because we supply it in laser packages rather than as a standalone receiver.
† Spectra’s CR700 documentation does not state these two. The CR700 uses super-bright LED grade arrows on both sides plus an LCD, so it is not a like-for-like comparison — call us if it matters to your job.
Working with a green beam laser? The HL450 is red spectrum only — you want the HL760U. Mounting on a machine rather than a rod? That is the CR700, which does both.
and Skip the Clamp.
If you already own a C45 clamp from another Spectra receiver — or you are replacing a receiver and keeping the bracket — there is no reason to pay for a second one. The HL450-BR is the identical HL450 Laserometer supplied without the rod clamp.
It is our best-selling version of this receiver, and it is the one most repeat customers order.
Need a spare battery door? The ATI991605-16 battery cover fits the HL450.
the HL450.
Buying the laser as well? These packages pair a Spectra rotating laser with the HL450 receiver, a grade rod and a tripod — cheaper than buying the pieces separately, and everything is matched.
Rod graduations matter — inches and tenths versions are different products. If you are not sure which your crew works in, call us on 1-877-866-5721 before you order.
Digital Readout Receivers.
Spectra’s own Kevin Morrissey walks through the HL450, HL700 and HL760 Laserometers — what separates them and which one suits which job.
We Actually Get.
What is the difference between reception height and smart reading height on the HL450?
What are smart readings and why do they matter?
Does the HL450 come with a rod clamp?
What is the difference between the HL450 and the HL450-BR?
How accurate is the Spectra HL450?
What rotating lasers will the HL450 work with?
How tough is the HL450 really?
What is the SuperCell reception window?
Does the HL450 reject interference from strobe lights?
How long do the batteries last?
Can the HL450 be read from both sides?
Which Spectra receiver should I buy — HR320, HL450, HL700 or HL760?
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5 As advertised
Posted by Steve stanley on 29th Jan 2026
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