LRF0405C — Laser rangefinder module
LRF0405C 1535 nm Laser Rangefinder Module. Maximum measuring range 4 km, accuracy ±2 m, interface UART, 3.3 V TTL level, weight 32 g.
Specifications
| Laser wavelength | 1535 nm |
|---|---|
| Maximum measuring range | 4 km |
| Minimum range | 15 m |
| Ranging accuracy | ±2 m |
| Update rate | Single measurement or 1 to 10 Hz |
| Beam divergence | 0.6 mrad |
| Pulse energy | 200 µJ |
| Lens / aperture | 8 mm |
| Interface | UART, 3.3 V TTL level |
| Weight | 32 g |
| Dimensions | 48 × 30.5 × 21 mm |
| Operating temperature | -40 to +70 degrees C |
| Multi-target reporting | Up to 3 targets |
| Laser safety (as documented) | Class I stated in the module document. Final accessible-emission classification applies to the complete configuration. |
4,000 m or more at 30% reflectance and visibility of at least 6 km
What this model is for
- Mid-range targeting, surveying and vehicle-mounted observation.
- Gimbal and sight integration where a few kilometres of usable range is the design point.
- Systems that need eye-safe 1535 nm operation at a modest size and mass.
Integration notes
LRF0405C 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 UART, 3.3 V TTL level and the documented supply is see datasheet. 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.
How LRF0405C differs from LRF0305C
| LRF0405C | LRF0305C | Δ | |
|---|---|---|---|
| Max range | 4 km | 4 km | same |
| Mass | 32 g | 14 g | −18 g |
| Accuracy | ±2 m | ±1 m | −±1 m |
| Pulse energy | 200 µJ | 100 µJ | −100 µJ |
| Divergence | 0.6 mrad | 0.6 mrad | same |
Close alternatives
Source: erdilrf.com/models/lrf0405c · transcribed 2026-10-23 · dataset · selector