Quick Answer
What is the Spectra Precision HL450?
See also: Trimble SL700 Smart Level Laser Receiver
See also: Leica Rod Eye 160 Digital Laser Receiver
The Spectra Precision HL450 is a universal laser receiver compatible with all major brands of 635nm red-beam rotary lasers. It features a large 203mm (8") detection band, triple-axis detection, and a bright LED display for use in direct sunlight.
Spectra Precision HL450 Laser Receiver — Complete Specs & Guide
Category: Laser Receiver | Brand: Spectra Precision | Model: HL450
The Spectra Precision HL450 is a rugged, universal laser receiver designed for grade rods, story poles, and machine masts. Its 203mm detection band and triple-axis sensing give contractors a wide detection window with sensitivity selectable between coarse and fine modes. The HL450 is a popular choice for pairing with Spectra, Topcon, Leica, and Trimble rotating lasers on earthmoving and construction grade work.
Spectra Precision HL450 Full Specifications
| Detection accuracy | ±1.5mm (fine mode) |
| Detection band height | 203mm (8 inches) total |
| Detection range | Up to 300m radius from laser |
| Sensitivity modes | Coarse, medium, fine (3-mode) |
| Display | Large LED bar with on-grade, high, low indicators |
| Audio indication | Adjustable-volume buzzer |
| Laser compatibility | All 635nm red-beam rotating lasers |
| Mounting | Integral clamp bracket for grade rods and masts |
| Power supply | 2× AA batteries |
| Battery life | Approximately 100 hours |
| Operating temperature | -20°C to +50°C |
| IP rating | IP54 |
| Weight | 320g (11.3 oz) |
Compatible Lasers
- Spectra Precision LL500 — Factory-matched pairing for Spectra grade lasers
- Topcon RL-H5A / RL-H4C — Full compatibility with 635nm beam
- Leica Rugby 620 / 640G — Passive detection mode
- Trimble LM80 / LL300 — Compatible; no digital output
- Any 635nm red rotating laser — Universal passive detection
Frequently Asked Questions — Spectra Precision HL450
What lasers are compatible with the Spectra Precision HL450?
The HL450 is compatible with any 635nm red-beam rotating laser, including Spectra Precision, Topcon, Leica Rugby, and Trimble models. It does not support 780nm or green-beam lasers. Digital machine control output is only active when paired with compatible Spectra Precision digital lasers.
What is the detection range of the Spectra HL450?
The HL450 can detect a laser signal up to 300m radius from the rotating laser instrument. Detection range decreases in bright, direct sunlight; switching to fine sensitivity mode or using a sunshade extends effective range.
What is the difference between the HL450 and the HL760?
The HL760 is Spectra's machine control-specific receiver with a larger 250mm detection band and digital output for dozer/grader blade control boxes. The HL450 is the contractor's general-purpose field receiver, lighter and simpler, intended for manual grade rod and stake work.
How do I mount the Spectra HL450?
The HL450 includes an integral bracket that clamps to standard 25mm grade rods, story poles, and machine masts. The bracket allows the receiver to slide up and down and lock at any height for quick grade-checking on layout and grade stakes.
Can the HL450 be used in direct sunlight?
Yes, with reduced range. In direct sunlight, switch to fine sensitivity mode and position the receiver to shade the detection window when possible. The bright LED display remains readable in most outdoor lighting conditions.
Related models: Trimble SL700 | Leica Rod Eye 160
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