LRF1831C · 1535 nm Laser Rangefinder Module
LRF1831C datasheet: specifications, range conditions, interface
Every value below is copied from the published LRF1831C specification table with its test condition, so you can compare it with other modules on equal terms.
LRF1831C key specifications
| Item | Published value |
|---|---|
| Model | LRF1831C |
| Published range | a) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for Target 1 (5 m × 15 m) is ≥ 6,500 m. b) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for a target with diffuse reflectance not less than 30% (20 m × 20 m) is ≥ 12,000 m. |
| Wavelength | 1535 ±5 nm |
| Interface | RS422 |
| Accuracy | ±2 m |
| Update rate | 0.5Hz ~10Hz |
| Supply | DC12 V |
| Weight | ≤410g |
| Dimensions | 113 × 76 × 90mm |
| Laser safety | Class I stated in the module document. Final accessible-emission classification applies to the complete configuration. |
| Price | From $3,500 per unit |
Full specification table
ERDI published product specifications, captured 2026-10-08.
| Parameter | Published value | Condition / note |
|---|---|---|
| Laser wavelength | 1535 ±5 nm | |
| Module laser-safety statement | Class I stated in the module document. Final accessible-emission classification applies to the complete configuration. | |
| Divergence Angle | ≤1.3 mrad | |
| Laser Energy | ≥350 μJ | |
| Main Functions of the Laser Rangefinder: | a) Single-shot and continuous ranging; b) Three-target ranging with near/far target indication; c) Self-test function (including current APD temperature, high-voltage value, internal voltage, and blind-zone value); d) Standby wake-up function. | |
| Receiver Lens Diameter | Ø60 mm | |
| Measurement range | a) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for Target 1 (5 m × 15 m) is ≥ 6,500 m. b) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for a target with diffuse reflectance not less than 30% (20 m × 20 m) is ≥ 12,000 m. | |
| Minimum range | ≤50 m | |
| Measurement frequency | 0.5Hz ~10Hz | |
| Interface | RS422 | |
| Ranging accuracy | ±2 m | |
| Range Resolution | ≤0.1 m | |
| Precision Rate | ≥98% | |
| False alarm rate | ≤1% | |
| Pin-in-lead package model | J30J | |
| Supply voltage | DC12 V | |
| Standby power consumption | ≤1.2W | |
| Average power consumption | ≤2 W | |
| Peak Power Consumption | ≤3W | |
| Weight | ≤410g | |
| Dimension (L×W×H) | 113 × 76 × 90mm | |
| Operating temperature | −40～+70 °C | |
| Storage temperature | −55～+75 °C | |
| Impact Resistance | Meet the MIL-STD-810G testing standard | |
| Vibration Resistance | Meet the MIL-STD-810G testing standard | |
| External plug-in XS3 | Model ：Molex51021-0500 | Remark |
Connector pinout
| Pin | Signal | Note |
|---|---|---|
| 1 | TTL RX | 3.3V |
| 2 | TTL TX | 3.3V |
| 3 | CTRL | 3.3V-5V power on, 0V power off |
| 4 | +12V | Power supply+ |
| 5 | GND | Power supply- |
| 1 | GND | Serial Port Ground |
| 2 | GND | 12V Input Negative |
| 3 | GND | 12V Input Negative |
| 4 | VCC 5V | 12V Input Positive |
| 5 | VCC 5V | 12V Input Positive |
| 6 | RS422 RX+ | Serial Port Receive + |
| 7 | RS422 RX- | Serial Port Receive - |
| 8 | RS422 TX- | Serial Port Transmit - |
| 9 | RS422 TX+ | Serial Port Transmit + |
Ordering the LRF1831C
The published single-unit price of the LRF1831C is $7,000, falling to $3,500 per unit at the largest published quantity band. Prices include shipping and are ordered directly from erdilrf.com. Technical questions and quantity quotes: tommy@erdimail.com. Full specification table, downloads and ordering: LRF1831C model page.
FAQ
What is the maximum range of the LRF1831C?
The published range is a) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for Target 1 (5 m × 15 m) is ≥ 6,500 m. b) Under line-of-sight conditions, with visibility not less than 15 km and humidity not greater than 80% (at 30 °C), the ranging distance for a target with diffuse reflectance not less than 30% (20 m × 20 m) is ≥ 12,000 m.. A range figure is only comparable together with the target and conditions it was measured on, so the condition is listed next to the value.
Which interface does the LRF1831C use?
The published communication interface is RS422.
What laser wavelength does the LRF1831C use?
The published wavelength is 1535 ±5 nm; laser safety entry: Class I stated in the module document. Final accessible-emission classification applies to the complete configuration..
How much does the LRF1831C cost?
The published single-unit price of the LRF1831C is $7,000, falling to $3,500 per unit at the largest published quantity band. Prices include shipping and are ordered directly from erdilrf.com.
Related guides
Model records
Open the model page for the full specification table, downloads, published price and ordering.
- LRF1831C — LRF1831C 1535 nm Laser Rangefinder Module