In today’s world of intelligent sensing and autonomous systems, compact laser rangefinder modules are becoming the backbone of precision measurement. Whether you're building UAVs, handheld systems, or robotic inspection tools, the need for high-performance, low-power, and miniaturized laser distance sensors is undeniable.
Among the leading technologies, 905nm Time-of-Flight (TOF) laser rangefinder modules stand out for their balance of eye safety, range, and integration flexibility. In this article, we explore the strengths of two compact LRF modules developed with cutting-edge TOF technology, and how they compare against common commercial solutions.
Why 905nm TOF Technology Matters
TOF-based rangefinders work by emitting short laser pulses and calculating the time it takes for the reflected signal to return. This technology enables fast, real-time distance measurements with high precision — even in harsh lighting or low-visibility environments.
In particular, 905nm lasers are widely used due to:
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Class 1 Eye Safety under IEC 60825-1 standards
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Compact diode availability and low-cost integration
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High responsiveness at short-to-medium ranges
Compact Modules, High Performance
Let’s take a closer look at two standout modules:
Module LRF1000A-03: Φ17×37.2 mm, 10g
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Max Range: ≥1000m @ 70% reflectivity
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Accuracy: ±0.5m (≤400m)
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Power: ≤0.85W
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Startup Time: ≤550ms
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Interface: UART (TTL_3.3V)
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Sealing: IP67 Lens Cavity
Module LRF1500A1-03: 26×25×14.5 mm, 11g
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Max Range: ≥1500m
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Accuracy: ±0.7m (≤200m)
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False Alarm Rate: ≤1%
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Power: ≤1.5W @ 25°C
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Operating Temp: -20°C to +70°C
These modules combine micro-sized mechanical design with long-range precision and real-time responsiveness — making them ideal for OEMs and system integrators.
How Do They Compare to Other Market Offerings?
| Feature | ERDI Modules | Common 905nm Modules | High-End LRF Systems |
|---|---|---|---|
| Max Range | 1000–1500m | 200–800m | ≥1500m |
| Accuracy | ±0.5–0.7m | ±1–2m | ±0.1–0.3m |
| Size | ≤Φ17mm or 26×25mm | 30–45mm cube | Large, ≥50mm |
| Weight | 10–11g | 20–40g | ≥60g |
| Power | ≤1.5W | 1–1.8W | 2W+ |
| Eye Safety | Class 1 | Class 1 | Class 1 or Class 3R |
The key advantage? Superior performance-to-size ratio. Most compact modules on the market sacrifice either accuracy, reliability, or power efficiency. Our modules provide all three.
Applications in Action
These LRF modules are ideal for:
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UAV-based mapping and collision avoidance
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Handheld rangefinder binoculars
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Autonomous ground vehicles (AGVs)
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Robotic arms and navigation systems
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Surveillance and tactical targeting platforms
Integration Made Simple
With UART TTL (3.3V) interface, configurable baud rates, and small form factors, these modules are plug-and-play ready for embedded developers. Need fast startup, low standby power, and stable outdoor operation? These modules check all the boxes.
Conclusion
Compact doesn’t mean compromise. With long-range performance, fast response time, and superior power efficiency, our 905nm TOF laser modules are redefining what’s possible in laser distance sensing.
Interested in samples or integration support? Contact our team: yeva@erdimail.com or explore more technical documentation on our product page.