LRF3000A1 3000m 905nm Laser Rangefinder Module for Handheld Optics, Survey Instruments and UAV Payloads

Technical Specifications

Communication Interface Definition

Connector Model: A1002WV-S-6P

Low-Power Mode:
In this mode, the device consumes extremely low power. The MCU is turned off and does not respond to any commands.

When measurement is required, pull the Enable pin low to switch the device into normal operating mode.
After the measurement is completed, pull the Enable pin high to return the device to low-power mode, where power consumption is less than 1 mW.

Mechanical Dimension Plan

Product Description

The LRF3000A1 is a lightweight 905nm laser rangefinder module built for OEM integration where long reach matters but size and power still have to stay civilized. It is well suited to handheld optical instruments, surveying and geology tools, UAV payloads, aviation and communications equipment, law-enforcement devices and outdoor sports products, which matches both the factory specification and the way compact 905nm OEM rangefinder modules are commonly positioned in public product listings.

In its reference condition—clear weather, visibility ≥4km, 70% reflectivity building target—the module reaches ≥3000m. The minimum distance is 1m on a 90% reflectivity white board. Accuracy is specified as ±0.7m up to 100m, and ±(0.7 + 0.003 × d) m above 100m, where d is the measured distance in meters. The module also maintains a valid measurement rate ≥98% with a false alarm rate ≤1%. In the field notes, ERDI further states that medium-reflectivity targets can reach about 3000m, high-reflectivity targets can exceed 3500m, while low-reflectivity targets may fall to around 2000m, especially when the target is small, oblique or not diffusely reflective.

Measurement rate is handled more cleverly than on many fixed-output modules. In Normal Mode the LRF3000A1 runs at adaptive 3–10Hz, while Long-Range Mode supports adaptive 1–10Hz. That lets integrators trade refresh rate against range stability depending on the scene. Optical parameters include a 905±10nm Class 1 laser, ≤10mrad typical beam divergence, ≈8mrad receiver field of view and 7.63mW average laser power, which places it firmly in the compact 905nm pulsed ranging class used for embedded electro-optical products rather than large stand-off designators.

Electrically, the module runs from DC 3.3–5V with UART (TTL_3.3V) communication. Factory baud rate is 115200bps, with 9600bps listed in the main specifications and a wider command-set menu that supports additional baud-rate settings up to 230400bps after reboot. Operating power is ≤1.8W @25°C, ≤2.1W @70°C and ≤1.6W @−20°C. The power-management logic is worth getting right: the Enable pin is active low. Pulled low, the module enters normal working mode; pulled high, it returns to a low-power state where consumption is <1mW. Startup plus first-ranging response is specified from ≤160ms + 100ms at short range to ≤160ms + 517ms at long range.

Mechanically, the module is small enough for compact housings and payload bays. The datasheet formatting drops the multiplication marks, but the size should be read as about 13.5 × 25.1 × 27.8 mm, with a weight of 12±0.5g. Environmental specifications include −20 to +60°C operating temperature, −25 to +75°C storage, 1000g/ms shock, 5–50–5Hz vibration at 2.5g, IP67 protection, and MTBF ≥1500h. That gives it enough ruggedness for portable optics and embedded outdoor equipment without drifting into the chunky, overbuilt world of larger vehicle-grade modules.

Integration is straightforward. The module uses a 6-pin A1002WV-S-6P connector with GND, 3.3–5V power, reserved pin, TTL_TXD, TTL_RXD and Enable. The UART protocol uses 8-byte frames with 0x55 0xAA header bytes, function code, four data bytes and checksum. Supported functions include single ranging, continuous ranging, stop ranging, optional angular measurement for versions equipped with an angle sensor, power-on self-test, baud-rate setting, and external-circuit enable/disable for its secondary low-power mode. Distance data is returned in hexadecimal as actual value ×10, so the host reconstructs the reading with one decimal place.

In practical deployment, this kind of 905nm module is most attractive when the product needs more reach than a small short-range sensor can provide, but still has to fit inside portable optics, compact survey instruments, UAV payloads or embedded electro-optical devices. Public OEM listings in the same segment repeatedly pair 905nm rangefinder modules with handheld optics, telescopes, small payloads and portable distance-measurement systems, which is exactly where the LRF3000A1 makes the most sense.