LRF1831C — Laser rangefinder module
LRF1831C 1535 nm Laser Rangefinder Module. Maximum measuring range 12 km, accuracy ±2 m, interface RS422, weight 410 g.
Specifications
| Laser wavelength | 1535 nm |
|---|---|
| Maximum measuring range | 12 km |
| Minimum range | 50 m |
| Ranging accuracy | ±2 m |
| Update rate | 0.5Hz ~10Hz |
| Beam divergence | 1.3 mrad |
| Pulse energy | 350 µJ |
| Lens / aperture | 60 mm |
| Interface | RS422 |
| Supply | DC12 V |
| Weight | 410 g |
| Dimensions | 113 × 76 × 90mm |
| Operating temperature | −40～+70 °C |
| Laser safety (as documented) | Class I stated in the module document. Final accessible-emission classification applies to the complete configuration. |
a) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for Target 1 (5 m × 15 m) is ≥ 6,500 m. b) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for a target with diffuse reflectance not less than 30% (20 m × 20 m) is ≥ 12,000 m.
What this model is for
- Long-range observation and target location, where the return comes from a large or cooperative target under clear air.
- Payloads that must reach kilometres without an active illuminator.
- Integration into gimbals, sights and remote observation heads with an external power and data harness.
Integration notes
LRF1831C is a bare module, not a finished instrument: it arrives with an electrical interface and a mechanical envelope, and your product owns the optics, the housing and the safety case. The documented interface is RS422 and the documented supply is DC12 V. Where a figure above is a limit (≤ / ≥), treat it as the manufacturer's statement and confirm the acceptance test in your own build rather than assuming margin.
For a 1535 nm rangefinder, the laser safety classification of the finished product is the integrator's responsibility: the module document states its own classification, and the accessible emission of your assembled unit must be assessed separately.
Close alternatives
Source: erdilrf.com/models/lrf1831c · transcribed 2026-10-22 · dataset · selector