TECHNICAL SPECIFICATIONS
| Project | Performance Indicators |
| Model | LRF0816C |
| Laser Wavelength | 1535±5nm |
| Eye- safety | Class Ⅰ |
| Divergence Angle | ≤0.3 mrad |
| Laser Energy | ≥300 μJ |
| Launch Lens Diameter | Φ12 mm |
| Receiver Lens Diameter | Φ25 mm |
| Measuring Range
（Reflectance 30%; visibility ≥ 8 km.） |
NATO objective(2.3m×2.3m) ≥8000m
Measuring human target(0.5m×1.7m) ≥1500m |
| Minimum Range | ≤50 m |
| Ranging Frequency | 1Hz ~10Hz |
| Number of multi-target detections | Up to 3 targets |
| Ranging Accuracy | ±2 m |
| Range Resolution | ≤0.1 m |
| 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
LRF0816C 8km 1535nm Eye-Safe Multi-Pulse Laser Rangefinder Module for Security Monitoring, UAV and Thermal Imaging
The LRF0816C is a Class I 1535nm eye-safe laser rangefinder module developed on ERDI’s self-designed erbium-glass laser platform. It uses multi-pulse time-of-flight ranging to deliver stable long-range performance while keeping power, size and weight within the limits required by security cameras, UAV gimbals, thermal imagers and smart industrial systems.
Operating at a wavelength of 1535±5nm with a divergence of ≤0.3mrad and pulse energy of ≥300µJ, the LRF0816C combines narrow beam geometry with high pulse energy. The transmit aperture is Φ12mm and the receive aperture is Φ25mm. Under 30% target reflectance and ≥10km visibility, the module achieves a NATO target (2.3m×2.3m) range of ≥8000m and a human-sized target (0.5m×1.7m) range of ≥1500m, with a minimum range of ≤50m. Ranging accuracy is ±2m, resolution is ≤0.1m, the precision (valid hit) rate is ≥98%, and the false-alarm rate is ≤1%, with up to three targets detected in a single measurement.
The LRF0816C supports a 1–10Hz ranging frequency, with both single-shot and continuous modes. Multi-target capability allows first, last and multi-target logic, which is critical in cluttered scenes such as urban corridors, forest edges or layered traffic environments where multiple returns are present.
Electrically, the module runs from a DC 4.5–16V supply. Standby power consumption is ≤1mW, average power is ≤4W, and peak power is ≤14W @12V, matching the needs of SWaP-constrained payloads that still require 8km-class performance. Communication is via a UART (TTL 3.3V) interface using an A1257WR-S-6P connector with dedicated pins for power, ground, POWER_ON, UART_TX and UART_RX. Supported baud rates are 115200bps (factory default), 57600bps and 9600bps, with a simple packet structure based on a 0xEE 0x16 frame header and device code 0x03.
Through the command set, the host system can perform equipment self-test, trigger single or continuous ranging, select first/last/multi-target mode, set and query baud rate, configure continuous ranging frequency, define minimum and maximum gating distances, query FPGA/MCU/hardware versions, read the serial number and monitor both the total number of laser shots and the number of shots for the current power-on session. These diagnostics are particularly useful in long-term security, traffic and industrial deployments where maintenance windows are limited and predictive health monitoring is required.
Mechanically, the LRF0816C is housed in a 65×48×32mm package with a weight of ≤58g±1g, making it suitable for integration inside PTZ domes, roadside enforcement cameras, UAV gimbals, robotic heads, weapon sights and multi-sensor EO/IR pods. It operates from −40 to +70°C and can be stored from −55 to +75°C, and it meets MIL-STD-810G shock and vibration requirements, enabling deployment on airborne, vehicle-mounted and fixed outdoor platforms exposed to long-term mechanical and thermal stress.
From an application perspective, the LRF0816C is not limited to classic rangefinding. Thanks to its 8km NATO capability, multi-pulse TOF processing and eye-safe 1535nm wavelength, it is well-suited for security monitoring, road traffic enforcement, robotic arm positioning, night-vision and thermal-imaging fusion, UAV navigation and altitude/obstacle sensing, weapon sights, golf and outdoor hunting optics, engineering surveying and even smart-facility sensing such as intelligent grain storage bins, where robust distance information and eye safety are equally important.
For systems that require a sealed front window—such as outdoor security housings or environmental monitoring stations—ERDI recommends using an optical window with AR coating optimized for 1525–1545nm and transmittance ≥99%. After applying any additional environmental coatings (hydrophobic or hard coat) and final mechanical assembly, overall transmittance should remain ≥97%. The optical window’s effective aperture, outer diameter, thickness (2–4mm) and spacing to the rangefinder must follow the geometry guidelines to minimize absorption and back-reflection, and the emission axis should be aligned within 2–4° of the window normal with the air gap kept as small as possible.