LRF1221C · 1.54 µm Laser Rangefinder Module
LRF1221C datasheet: specifications, range conditions, interface
Every value below is copied from the published LRF1221C specification table with its test condition, so you can compare it with other modules on equal terms.
LRF1221C key specifications
| Item | Published value |
|---|---|
| Model | LRF1221C |
| Published range | 4m × 6m Objective ≥12 km |
| Wavelength | 1.54μm±0.02μm |
| Interface | RS422 |
| Accuracy | ±2 m |
| Update rate | 0.5Hz ~10Hz |
| Supply | DC12 V |
| Weight | ≤275g |
| Dimensions | 107 × 62 × 72mm |
| Laser safety | Class I stated in the module document. Final accessible-emission classification applies to the complete configuration. |
| Price | From $1,300 per unit |
Full specification table
ERDI published product specifications, captured 2026-10-08.
| Parameter | Published value | Condition / note |
|---|---|---|
| Laser wavelength | 1.54μm±0.02μm | |
| Module laser-safety statement | Class I stated in the module document. Final accessible-emission classification applies to the complete configuration. | |
| Divergence Angle | ≤0.3 mrad | |
| Laser Energy | ≥300 μJ | |
| Launch Lens Diameter | Ø12 mm | |
| Receiver Lens Diameter | Ø40 mm | |
| Measuring Range （Reflectance 30%; visibility ≥15km.） | 4m × 6m Objective ≥12 km | |
| 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@10Hz | |
| Weight | ≤275g | |
| Dimension (L×W×H) | 107 × 62 × 72mm | |
| 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 LRF1221C
The published single-unit price of the LRF1221C is $3,400, falling to $1,300 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: LRF1221C model page.
FAQ
What is the maximum range of the LRF1221C?
The published range is 4m × 6m Objective ≥12 km. 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 LRF1221C use?
The published communication interface is RS422.
What laser wavelength does the LRF1221C use?
The published wavelength is 1.54μm±0.02μm; laser safety entry: Class I stated in the module document. Final accessible-emission classification applies to the complete configuration..
How much does the LRF1221C cost?
The published single-unit price of the LRF1221C is $3,400, falling to $1,300 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.
- LRF1221C — LRF1221C 1.54 µm Laser Rangefinder Module