Detailed LR2000E4 Specifications
Every value below is bound to the model source named on this page. Qualifiers and test conditions are retained; missing values are not inferred.
Optical parameters
| Parameter | Value | Source condition |
|---|---|---|
| Laser wavelength | 905 nm ±5 nm | LR2000E4 controlled source technical table rows 1–17 only |
| Laser beam divergence | <6 mrad | LR2000E4 controlled source technical table rows 1–17 only |
| Optical material | PMMA | LR2000E4 controlled source technical table rows 1–17 only |
Mechanical and environmental
| Parameter | Value | Source condition |
|---|---|---|
| Receiver aperture | 9.2 × 14.5 mm | LR2000E4 controlled source technical table rows 1–17 only |
| Valid measurement rate | ≥98% (≤400 m); ≥80% (400 m < D ≤2000 m) | LR2000E4 controlled source technical table rows 1–17 only |
| False alarm rate | ≤1% | LR2000E4 controlled source technical table rows 1–17 only |
| Baud rate | 115200 bps | LR2000E4 controlled source technical table rows 1–17 only |
| Startup time | ≤200 ms | LR2000E4 controlled source technical table rows 1–17 only |
| Operating temperature | -20°C to +60°C | LR2000E4 controlled source technical table rows 1–17 only |
| Storage temperature | -40°C to +60°C | LR2000E4 controlled source technical table rows 1–17 only |
Basic ranging performance
| Parameter | Value | Source condition |
|---|---|---|
| Ranging range | 4–2000 m | LR2000E4 controlled source technical table rows 1–17 only |
| Ranging accuracy | ±1 m (D ≤400 m); D × 0.4% (400 m < D ≤2000 m) | LR2000E4 controlled source technical table rows 1–17 only |
| Ranging frequency | 2–10 Hz, adaptive | LR2000E4 controlled source technical table rows 1–17 only |
Electrical and communication interface
| Parameter | Value | Source condition |
|---|---|---|
| Communication interface | UART-TTL (customizable) | LR2000E4 controlled source technical table rows 1–17 only |
| Supply voltage | 3.3–5 V | LR2000E4 controlled source technical table rows 1–17 only |
| Startup inrush current | <400 mA | LR2000E4 controlled source technical table rows 1–17 only |
| Operating power consumption | ≈1.2 W | LR2000E4 controlled source technical table rows 1–17 only |
Functional Description
External-circuit enable and disable place the module into normal operation or reduce external-circuit power consumption.
Single-shot measurement triggers one target measurement. For a low-reflectivity target, the source says the module repeats measurements until stable distance data is obtained and reports the result through the serial port.
Multiple-measurement mode performs continuous ranging. The source functional section states a typical 2 Hz update rate and a maximum of 10 Hz.
Electrical Interface Definition
Signal names and directions are transcribed from the model source.
| Pin | Signal | Source-stated function |
|---|---|---|
| 1 | GND | Power negative |
| 2 | VCC | Power positive |
| 3 | I/O (reserved) | Reserved for expansion |
| 4 | TXD | Signal output, ranging module to host |
| 5 | RXD | Signal input, host to ranging module |
| 6 | SW-SHOT | Function enable; no public default polarity is stated |
Mechanical Dimension Drawing and Electrical Interface Diagram
These figures are extracted from the named model source without generative modification.
Pulsed Time-of-Flight Engineering Context
The public LR2000E4 source used here does not state the internal timing architecture. The equation below describes pulsed time-of-flight ranging generally and is not presented as an additional LR2000E4 specification.
Real performance also depends on target reflectivity and area, incidence angle, atmospheric attenuation, receiver aperture, background light, detector response, timing thresholds and contamination of the optical path.
What the verified data supports
These are traceable design inputs, not unsupported superlatives or guaranteed field outcomes.
Performance envelope
Ranging range: 4–2000 m · Ranging accuracy: ±1 m (D ≤400 m); D × 0.4% (400 m < D ≤2000 m)
Timing and output
Ranging frequency: 2–10 Hz, adaptive
Electrical integration
Supply voltage: 3.3–5 V · Communication interface: UART-TTL (customizable) · Operating power consumption: ≈1.2 W
Mechanical integration
Operating temperature: -20°C to +60°C
Source-stated application context
Application labels indicate where the source proposes evaluation; they do not prove fitness without system testing.
- Auxiliary ranging in handheld night-vision devices, thermal imagers, telescopes and laser illuminators
- Border-security monitoring, aviation, communications, railway, law-enforcement, smart-water-conservancy and outdoor-sports ranging scenarios
Confirm before selection
- Define target size, reflectivity, incidence angle and required detection probability.
- Reproduce sunlight, visibility, weather and optical-window conditions in acceptance testing.
- Verify voltage tolerance, peak current, grounding, interface levels, baud rate and connector revision.
- Separate accuracy, repeatability and displayed resolution in host requirements.
- Confirm mounting datum, boresight, field of view, enclosure sealing and thermal path.
- Assess accessible emission and labeling again after integration into the finished equipment.
Questions to resolve before design release
Does the maximum stated range apply to every target?
No. Use the reflectivity and environmental conditions shown beside the range row. Smaller, darker, oblique or partially obscured targets and degraded visibility can reduce received signal.
Are resolution, repeatability and accuracy interchangeable?
No. Resolution is the reporting increment, repeatability describes variation under repeated conditions, and accuracy describes closeness to the reference distance under the stated test method.
Is the finished product automatically assigned the module laser class?
No. A module-level source statement does not replace the accessible-emission and failure-condition assessment of the finished equipment, its window, controls, service access and labeling.
Which documents control wiring and interface release?
The ordered connector drawing, pin definition and approved interface document control the design.
Product evidence and general technical context
The model PDF controls product claims. Public references support only the general engineering explanations and must not be used to infer a missing model value.
- LR2000E4 verified product specificationModel-specific product evidence; SHA-256 is shown above.
- System Design of a Pulsed Laser RangefinderOptical Engineering 30(3), 1991 - link budget, background, noise, detection and range error.
- The Short-Range, High-Accuracy Compact Pulsed Laser Ranging SystemSensors 22(6), 2146, 2022 - pulsed-ToF equation, timing error, reflectivity and temperature effects.
- Laser system range calculations and the Lambert W functionApplied Optics 48(4), B1-B7, 2009 - range performance versus atmospheric transmission, target and system parameters, and threshold SNR; its 1.06 µm example is general context, not ERDI model data.
- Monostatic all-fiber rangefinder systemApplied Optics 54(25), 7687-7694, 2015 - a measured case study of shared-aperture geometry and receiver-recovery loss; it does not establish an ERDI model limit.
- Light Transmission in Fog: The Influence of Wavelength on the Extinction CoefficientApplied Sciences 9(14), 2843, 2019 - measured and modeled wavelength-dependent fog attenuation.
- IEC 60825-1:2014Laser-product classification and accessible-emission requirements; final equipment requires system-level assessment.