TECHNICAL SPECIFICATIONS
| Project | Performance Indicators |
| Model | LRF0612C |
| Laser Wavelength | 1535±5nm |
| Eye- safety | Class Ⅰ |
| Divergence Angle | ≤0.3 mrad |
| Laser Energy | ≥200 μJ |
| Launch Lens Diameter | Φ12 mm |
| Receiver Lens Diameter | Φ25 mm |
| Measuring Range
（Reflectance 30%; visibility ≥ 8 km.） |
NATO objective(2.3m×2.3m) ≥6000m
Measuring human target(0.5m×1.7m) ≥1200m |
| Minimum Range | ≤50 m |
| Ranging Frequency | 1Hz ~10Hz |
| Number of multi-target detections | Up to 3 targets |
| Ranging Accuracy | ±2 m |
| Range Resolution | ≤0.1m |
| Precision Rate | ≥98% |
| False Alarm Rate | ≤1% |
| Pin-in-lead package model | A1257WR-S-6P |
| Supply Voltage | DC 4.5～16 V |
| Standby power consumption | ≤1 mW |
| Average power consumption | ≤4 W @ |
| Peak Power Consumption | ≤14W @12 V |
| Weight | ≤ 58±1g |
| Dimension (L×W×H) | 65mm×48mm×32 mm |
| Operating Temperature | -40～+70 ℃ |
| Storage Temperature | -55～+75 ℃ |
| Impact Resistance | Meet the MIL-STD-810G testing standard |
| Vibration Resistance | Meet the MIL-STD-810G testing standard |
OUTLINE DIMENSION(mm)
The overall dimension of the ranging module and the user installation interface are shown in the figure below.
PIN interface
User electrical interface:UART,TTL_ 3.3V
The connector model of electrical interface is A1257WR-S-6P, and the specific wiring definition is shown in the table below.
| Pin | Definition | Description | Cable color |
| 1 | Positive power supply | Power supply, 4.5 ~ 16V | Red |
| 2 | Negative power supply | Power supply, ground | Black |
| 3 | POWER_ON | Module power switch, TTL_ 3.3V level;
Module on (> 2.7V), module off (< 0.3V); |
White |
| 4 | UART_TX | Serial port sender, TTL_ 3.3V level | Yellow |
| 5 | UART_RX | Serial port receiver, TTL_ 3.3V level | Green |
Product Description
LRF0612C 6km 1535nm Eye-Safe Multi-Pulse Laser Rangefinder Module for Security, Traffic and UAV Systems
The LRF0612C is a Class I 1535nm eye-safe laser rangefinder module based on ERDI’s self-developed erbium-glass laser platform. Using multi-pulse time-of-flight ranging, it delivers stable long-range performance with low power consumption, compact size and light weight. The module is designed for OEM integration in security monitoring, road traffic cameras, robotic arms, night-vision systems, UAV payloads, weapon sights, golf and outdoor hunting optics, EO/IR pods, thermal imagers, engineering surveying tools and intelligent grain storage bins.
With a laser wavelength of 1535±5nm, divergence ≤0.3mrad and pulse energy ≥200µJ, the LRF0612C combines tight beam control with sufficient energy for reliable detection. The transmit aperture is Φ12mm and the receive aperture is Φ25mm. Under 30% target reflectance and ≥8km visibility, it measures NATO targets (2.3m×2.3m) to ≥6000m and human targets (0.5m×1.7m) to ≥1200m, with a minimum range of ≤50m. Ranging accuracy is ±2m, resolution ≤0.1m, precision rate ≥98% and false-alarm rate ≤1%, while up to three targets can be detected in a single shot, supporting first, last and multi-target logic.
The LRF0612C supports a 1–10Hz ranging frequency with both single-shot and continuous modes, letting system designers balance update rate against power budget and data bandwidth. Multi-pulse processing improves detection reliability in haze, light rain or cluttered scenes. Distance gating allows minimum and maximum ranges to be set, which is particularly useful in roadside monitoring, perimeter security and smart-facility applications where near-field structures and background clutter need to be suppressed.
Electrically, the module operates from a DC 4.5–16V supply, simplifying integration with UAV, vehicle and fixed-site power rails. Standby power consumption is ≤1mW, typical average power is ≤4W and peak power is ≤14W at 12V, allowing deployment in SWaP-sensitive platforms that still require 6km-class performance. Communication uses a UART interface at TTL 3.3V levels via an A1257WR-S-6P connector, with pins for power, ground, POWER_ON, UART_TX and UART_RX. The default baud rate is 115200bps, with 57600bps and 9600bps also supported, using a simple packet format (0xEE 0x16 header, device code 0x03).
Through the UART command set, the host system can perform equipment self-test, trigger single or continuous ranging, select first/last/multi-target mode, configure baud rate, set continuous ranging frequency, define minimum and maximum gating distances, and query FPGA/MCU/hardware version numbers, serial number, total laser shots and per-power-on shot counts. This enables predictive maintenance, life-cycle tracking and in-field diagnostics for demanding security, traffic and industrial deployments.
Mechanically, the LRF0612C comes in a 65×48×32mm housing with a weight of ≤58g, making it suitable for integration inside PTZ domes, traffic enforcement cameras, medium-size UAV gimbals and industrial sensor heads. It is specified for an operating temperature range of −40 to +70°C and storage from −55 to +75°C, and it passes impact and vibration testing to MIL-STD-810G, ensuring reliable operation on airborne, vehicle-mounted and fixed outdoor platforms.
For systems requiring a sealed optical window—such as roadside boxes, perimeter towers or smart grain silos—ERDI recommends an AR coating optimized for 1525–1545nm with ≥99% transmittance, combined with hydrophobic or hard coatings according to the environment. Overall transmittance after coating and mechanical integration should remain ≥97%. The datasheet provides guidelines for effective aperture, outer diameter and spacing between the window and the rangefinder to minimise attenuation and back-reflection; the laser emission axis should be kept within 2–4° of the window normal, and the air gap should be as small as possible.
In real-world use, 1535nm eye-safe modules like the LRF0612C are chosen not only for long-range ranging but also for security monitoring, road traffic enforcement, UAV navigation, robotic perception, night-vision augmentation, thermal imaging fusion and smart infrastructure sensing, where accurate distance information, Class I eye-safety and compact design are mandatory. The 1.5µm band offers good atmospheric penetration and is invisible to standard night-vision intensifiers, while remaining compatible with telecom-grade optics, which makes the LRF0612C a flexible building block for next-generation multi-sensor systems.