LRF1221C — Laser rangefinder module
LRF1221C 1.54 µm Laser Rangefinder Module. Maximum measuring range 12 km, accuracy ±2 m, interface RS422, weight 275 g.
Specifications
| Laser wavelength | 1.54 µm (1540 nm) |
|---|---|
| Maximum measuring range | 12 km |
| Minimum range | 50 m |
| Ranging accuracy | ±2 m |
| Update rate | 0.5Hz ~10Hz |
| Beam divergence | 0.3 mrad |
| Pulse energy | 300 µJ |
| Lens / aperture | 12 mm |
| Interface | RS422 |
| Supply | DC12 V |
| Weight | 275 g |
| Dimensions | 107 × 62 × 72mm |
| 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. |
4m × 6m Objective ≥12 km
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
LRF1221C 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 1.54 µm 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/lrf1221c · transcribed 2026-10-22 · dataset · selector