905nm Laser Rangefinder Module 1200m SFA1200BJ

Key Selling Points

Exceptional Long‑Range & Short‑Range Coverage: To begin with, this module delivers a maximum ranging distance of ≥1200m on 70% reflectivity building targets and a minimum of 5m on 90% reflectivity white targets. Therefore, it performs excellently in both long‑distance surveying and close‑range detection scenarios.

High‑Precision Measurement: Furthermore, the module achieves accuracy of ±0.7m for distances ≤100m and ±(0.7 + 0.004×D)m for distances >100m. In addition, it maintains a measurement success rate ≥98% and a false alarm rate ≤1%. As a result, it ensures reliable data for critical decision‑making.

Ultra‑Compact & Lightweight Design: Moreover, this miniature module measures just 14.5mm×25mm×26mm and weighs only 12±0.5g. Consequently, it ranks as one of the smallest in its class, enabling seamless integration into space‑constrained UAVs, handheld devices, and robotic systems.

Low Power Consumption & Standby Control: Additionally, we have designed the module to feature standby power ≤1mW (with the enable pin high) and operating power ≤1.5W@25°C. Thanks to dynamic power switching via the enable pin, it proves ideal for battery‑powered applications.

Flexible Measurement Modes: The module also supports both single ranging and continuous ranging with customizable intervals. Specifically, continuous mode runs at 3Hz for the same target and 2Hz when switching targets. Hence, it adapts smoothly to both static and dynamic scenarios.

Class 1 Eye‑Safe Laser: For safety assurance, the module operates at 905nm and holds IEC 60825‑1 Class 1 certification. Therefore, it poses no risk of eye injury and makes itself safe for civilian and public‑area deployments.

Robust Environmental Resilience: Furthermore, the module achieves an IP67 rating, withstands shock up to 1000g/ms, and endures vibration of 5–50–5Hz at 2.5g. Additionally, it operates from ‑20°C to +60°C and stores from ‑25°C to +75°C. Consequently, it ensures dependable performance even in harsh outdoor conditions.

Standard Serial Communication & Easy Integration: For seamless connectivity, the module uses a UART‑TTL (3.3V) interface with a default baud rate of 115200 bps. Moreover, it supports multiple baud rates, including 9600, 14400, 19200, 38400, 56000, 57600, 128000, and 230400 bps. This flexibility greatly simplifies embedded system integration.

Comprehensive Development Support: Finally, we provide dedicated test software, a complete communication protocol, power‑on self‑test, and an LD continuous‑on debugging mode. Together, these tools accelerate development cycles and reduce time‑to‑market.

Functions

Single & Continuous Ranging: Upon receiving corresponding commands, the module performs single‑shot or continuous distance measurements. It then returns both status (success/failure) and distance data in real time, enabling prompt response.

Power‑On Self‑Test: At startup, the module automatically checks its system status. Specifically, it returns STA=1 for success or an error code for diagnosis. This feature ensures operational readiness before each mission.

Low‑Power Mode Control: The enable pin (Pin 6) allows users to switch between normal operation and standby mode (<1mW). As a result, this function extends battery life significantly.

Configurable Baud Rate: The module supports nine baud rate settings via serial commands, which take effect after a restart. Consequently, this provides flexibility for various host controllers and system configurations.

LD Continuous‑On Mode: For development and alignment purposes, we have included a dedicated debugging mode that users can enable or disable via command. However, we advise avoiding prolonged use to prevent overheating.

Reliable Communication Protocol: Finally, the module uses an 8‑byte frame format with header (55 AA), function code, data bytes, and checksum. All data transmits in hexadecimal format, with distance values scaled by 10× for integrity.

Application Areas

Unmanned Aerial Vehicles (UAVs): Thanks to its ultra‑lightweight and compact form, this module proves ideal for drone altimetry, terrain following, obstacle avoidance, and precision landing.

Industrial Automation & Robotics: Similarly, manufacturers can integrate it into AGVs, robotic arms, and production lines for precise positioning, distance monitoring, and collision prevention.

Security & Surveillance: Moreover, security professionals use it in perimeter protection, border monitoring, and law enforcement equipment for reliable target ranging.

Engineering & Surveying: Additionally, the module supports construction layout, infrastructure inspection, geological surveys, and telecommunication tower measurement.

Outdoor Sports & Hunting: Its compact size and light weight also make it perfect for golf rangefinders, hunting scopes, and navigation tools.

Aerospace & Defense: Finally, it suits small aircraft, unmanned ground vehicles (UGVs), and tactical equipment that demand compact, high‑performance ranging modules.

• Parameter	Specification
  Maximum Ranging Distance	≥1200m @ 70% reflectivity, building target
  Minimum Ranging Distance	5m @ 90% reflectivity, white target board
  Ranging Accuracy (d ≤ 100m)	±0.7m
  Ranging Accuracy (d > 100m)	±(0.7 + 0.004 × d)m
  Measurement Frequency (same target)	3Hz
  Measurement Frequency (switching targets)	2Hz
  Measurement Success Rate	≥98%
  False Alarm Rate	≤1%
  Laser Wavelength	905 ± 10nm
  Laser Classification	Class 1 (IEC 60825‑1)
  Laser Beam Divergence (typical)	≤10 mrad
  Average Laser Power	7.63 mW
  Receiver Field of View (FOV)	≈8 mrad
  Interface Type	UART‑TTL (3.3V)
  Default Baud Rate	115200 bps
  Supply Voltage	DC 3.3 ± 0.1V
  Standby Power (POWER_ON high)	≤1 mW
  Standby Power (POWER_ON low)	≤350 mW
  Operating Power @25°C	≤1.5 W
  Operating Power @70°C	≤1.8 W
  Operating Power @‑20°C	≤1.3 W
  Response Time (System Startup + First Measurement)	Min: ≤550ms + 46ms (short range)
  	Max: ≤550ms + 458ms (long range)
  Dimensions (L×W×H)	14.5mm × 25mm × 26mm
  Weight	12 ± 0.5g
  Shock Resistance	1000 g/ms (10 times/s along optical axis)
  Vibration Resistance	5–50–5Hz, 1 octave/min, 2.5g
  Operating Temperature	‑20°C to +60°C
  Storage Temperature	‑25°C to +75°C
  MTBF	≥1500h
  Ingress Protection	IP67