Siman SDFM Series Laser Ranging LiDAR Sensor Module (100m - 1500m, UART / I2C, 10kHz, 9-36V DC)

Legend

[Official] — from the SDFM series specification sheet and product literature published by Siman Sensing (郑州西曼传感技术有限公司). [Needs datasheet] — not stated by the manufacturer; confirm before quoting.

1. Quick Start Guide & Tech Docs

• SDFM series laser ranging LiDAR — official specification sheet (PDF) [Official]
• Siman Sensing official site — datasheet and customisation enquiries [Official]

2. Introduction

The SDFM series is a dToF laser ranging module from Siman Sensing for medium and long range measurement, indoor and outdoor. Six versions share one 33 × 34 × 18 mm, 20 g housing: SDFM50 (50 m, with a visible red aiming laser), SDFM100, SDFM200, SDFM300, SDFM600 and SDFM1500, spanning 50 m to 1500 m at 90% reflectivity. A 905 nm Class 1 laser, 100 klux ambient light immunity and 1 kHz default output rate put it in the UAV altitude-hold and industrial monitoring class. [Official]

3. Features

• Six range versions, one footprint — 50 / 100 / 200 / 300 / 600 / 1500 m at 90% reflectivity; 30 / 70 / 100 / 200 / 300 m at 10% reflectivity for the 100–1500 m models. Blind zone 0.05 m. [Official]
• 1 cm resolution — the smallest distance step the module reports. [Official]
• Adjustable rate with weak-signal fallback — 1 kHz default, settable 20 Hz to 10 kHz; drops automatically to 50 Hz at long range when the return signal is weak, trading speed for hit rate. [Official]
• Visible aiming laser on SDFM50 — the only version with a red indicator beam, for positioning during installation; the others have no indicator laser. [Official]
• 100 klux ambient light immunity — holds measurement in direct sunlight and strong electromagnetic environments. [Official]
• Dual interface — UART at 460800 bps, 8 data bits, 1 stop bit, no parity; IIC at default address 0x33. [Official]
• Wide input, low power — 9–36 VDC, 30 mA average, 100 mA peak; 0.7 W on the 100/200 m versions and 1.2 W on the 300/600/1500 m versions. [Official]
• Compact and light — 33 × 34 × 18 mm, 20 ± 2 g, 4 × M2 mounting holes. [Official]
• Customisable — housing structure and output protocol can be customised; ask the factory for lead time and MOQ. [Official]

4. Applications

• SDFM50 — indoor short range — AGV anti-collision, stacker position calibration, production-line dimension checks, robot-arm workpiece alignment, inspection-cart obstacle sensing. [Official]
• SDFM300 — plant-wide general purpose — crane and gantry anti-collision, heavy transporter warning, PV and wind-farm inspection drone altitude hold, small silo level. [Official]
• SDFM600 — outdoor mid to long range — bulk stockyard volume, road slope displacement, pipeline and powerline inspection clearances. [Official]
• SDFM1500 — kilometre class — dam, tailings pond and high mountain slope deformation; quay crane and open-pit mine site anti-collision; long-distance wind farm and pipeline inspection. [Official]

5. Specification

5.1 Optical and ranging

• Principle: direct time-of-flight (dToF), SPAD receiver [Official]
• Wavelength / class: 905 nm, Class 1 [Official]
• Beam divergence: approx. 4 mrad [Official]
• Range at 90% reflectivity: 50 / 100 / 200 / 300 / 600 / 1500 m by model [Official]
• Range at 10% reflectivity: 30 / 70 / 100 / 200 / 300 m for the 100–1500 m models; SDFM50 value not published [Official] / [Needs datasheet]
• Blind zone: 0.05 m [Official]
• Resolution: 1 cm [Official]
• Absolute accuracy: ±10 cm up to 10 m; ±1% beyond 10 m [Official]
• Repeatability: ±5 cm up to 10 m; ±10 cm at 300 m; ±100 cm at 1500 m [Official]
• Measuring rate: 1 kHz default, adjustable 20 Hz – 10 kHz, auto fallback to 50 Hz on weak signals [Official]
• Ambient light immunity: 100 klux [Official]
• Indicator laser: visible red on SDFM50; none on the other models [Official]

5.2 Electrical and interface

• Supply voltage: 9–36 VDC [Official]
• Current: 30 mA average, 100 mA peak [Official]
• Power consumption: 0.7 W (SDFM100 / SDFM200); 1.2 W (SDFM300 / SDFM600 / SDFM1500) [Official]
• UART: 460800 bps, 8-N-1, 3.3 V TTL [Official]
• IIC: default address 0x33 [Official]
• Data frame: hexadecimal, little-endian, 4 bytes per frame, with checksum [Official]
• Cable: 1.25 mm 5-pin, 50 cm loose wire — red 9–36 V, black GND, yellow UART GND, green TX, blue RX [Official]

5.3 Mechanical and environment

• Dimensions: 33 × 34 × 18 mm [Official]
• Weight: 20 ± 2 g [Official]
• Mounting: 4 × M2, 5 mm thread depth [Official]
• Operating temperature: -20 °C to +60 °C [Official]
• Ingress protection: none declared — the specification sheet lists N/A. The module is not sealed, so outdoor installations need a separate enclosure [Official]

6. Safety Notice

This is not a safety sensor and must not be used for personnel protection — the manufacturer states this explicitly. Anti-collision and proximity uses listed above are equipment-oriented; they do not substitute for a certified safety-rated device in any application where human injury is a risk. [Official]