Meet the LRF1200A1
The LRF1200A1 is a cylindrical ranging module for compact instruments that need a serial distance output. Its specification lists a building-target measurement range of 5–1200 m and an update rate of 1–3 Hz.
The 0.1 m display increment is distinct from ranging accuracy. Accuracy is ±1 m from 5 to 100 m and follows a distance-dependent formula above 100 m. This distinction helps define a realistic display and acceptance test.
Electrical integration differs from the E series: the specified supply is 3.3 ± 0.1 V DC, not a general 3.3–5 V input range. Use the LRF1200A1 pin definition, low-power behavior, and communication protocol.
01
Cylindrical format
Ø23 × 40 mm dimensions and an 18 g specified mass.
02
Building-target ranging
5–1200 m range with 1–3 Hz output.
03
Separate resolution and accuracy
0.1 m display increment with a distance-dependent accuracy formula.
04
3.3 V electrical integration
3.3 ± 0.1 V DC supply and a 3.3 V TTL-level UART interface.
TECHNICAL DATA
LRF1200A1 Specifications
Read performance values with their target and test conditions. The linked user manual provides the complete mechanical, electrical, and communication details.
| Parameter | Value | Conditions / notes |
| Laser wavelength |
905 nm |
— |
| Measurement range |
5–1200 m |
Building target; the source table gives ≥5–1200 m. |
| Ranging accuracy |
±1 m (5 m ≤ L ≤ 100 m); ±(1 + 0.004L) m (L > 100 m) |
L is distance in meters. |
| Display resolution |
0.1 m |
Reporting increment, not ranging accuracy. |
| Measurement update rate |
1–3 Hz |
— |
| Communication interface |
UART, 3.3 V TTL |
— |
| Supply voltage |
3.3 ± 0.1 V DC |
— |
| Standby power consumption |
≤400 mW |
— |
| Operating power consumption |
≤1.5 W |
— |
| Startup time |
≤500 ms |
— |
| Dimensions |
Ø23 × 40 mm |
Cylindrical; use the drawing tolerances. |
| Weight |
18 g |
— |
| Operating temperature |
−20 °C to +60 °C |
— |
| Storage temperature |
−55 °C to +65 °C |
— |
| Ingress protection |
IP67 |
Lens only. |
| Laser safety class |
Class 1 |
As stated in the model manual; finished-equipment assessment is separate. |
| Transmitter lens diameter |
Ø6.6 mm |
— |
| Receiver lens diameter |
Ø18 mm |
— |
- For civilian equipment only. The model manual prohibits military applications.
Operation and Data Output
The host uses the serial communication protocol to operate the ranging module. The low-power mode turns the controller off, so it does not respond to normal commands while asleep.
The manual describes an active-low enable input for normal operation and a high level for low-power mode. Use the LRF1200A1 interface and timing definitions rather than an E-series wiring assumption.
Electrical Interface
| Pin | Signal | Function |
| 1 |
GND |
Power ground |
| 2 |
Power Supply |
3.3 V DC input; specified supply tolerance: ±0.1 V |
| 3 |
NC |
Not connected |
| 4 |
TTL_TXD |
Transmit data: module → host; 3.3 V TTL |
| 5 |
TTL_RXD |
Receive data: host → module; 3.3 V TTL |
| 6 |
Enable Pin |
Active low: normal operation. High level: low-power mode. |
Mechanical Dimensions
Use the drawing and its tolerances for installation. This drawing is reproduced directly from the current LRF1200A1 user manual.
