Meskernel LDK-40 40m Laser Distance Meter Module, Laser Displacement Sensor, TTL/RS232/RS485, ±2mm, 3Hz

Overview

The Meskernel LDK-40 Laser Distance Meter module (laser displacement sensor) is a compact ranging module designed for precise distance measurement. It provides 0.03–40 m indoor range at high reflectivity, millimeter-level resolution, and stable 3 Hz output. The module supports optional data interfaces and is suitable for industrial measurement, warehouse monitoring, traffic investigation, robots, and related applications.

Key Features

• Indoor range 0.03–40 m (90% rate of reflection); outdoor up to 35 m with special reflector plate
• Accuracy 2 mm; absolute accuracy ±2 mm; resolution 1 mm; blind area 3 cm
• Red laser 635 nm, <1mW, Class II safety laser; laser type 620–690 nm
• Output frequency 3 Hz; measuring time 0.125–4 seconds
• UART TTL interface; optional TTL/RS485/RS232 three-in-one interface; supports Bluetooth transmission (per vendor description)
• VTTL=3.3 V serial level; working voltage DC+3.3 V; voltage range DC 2.0–3.3 V
• Typical working current 80 mA; module power 0.27 W; laser power max less than 1mw
• Compact module: volume 48*26*13mm; weight 10 g
• Supports FFC (Flexible Flat Cable) and bonding wire connections
• PC test software tools available for data acquisition and verification

Specifications

Notes

• Under strong light or very high/low diffuse reflectance, the error may increase: ±1 mm + 50 PPM; use a reflector when needed.
• Operating temperature -10~50 °C can be customized.
• 8Hz is only available in fast continuous measuring mode.

Applications

• Intelligent mechanical arm: add high-precision distance measurement to control target approach
• Intelligent logistics: ensure goods are placed at specified distances without manual operation
• Engineering surveying: distance, area, and volume measurement
• Security monitoring: can be used with airport security monitoring and infrared cameras
• Transfer belt: detect whether cargo is present on a conveyor belt

Details

LDK-40 Laser Distance Meter with USB to TTL, RS485, RS232, Bluetooth, and Multifunction Converter interfaces.

Laser rangefinder module connects to master board via UART, powered by +3.3V, with GPIO control and pull-up resistors on TXD/RXD lines.

LR Control V2.0 software interface for laser distance measurement. Displays serial port settings including port selection, baud rate set at 19200, and options for RTS and DTR. Features buttons for laser control: LaserOn, Measure, StartTracking, GetParam, GetStatus, GetTopr, GetMeasOffset, and Clear. Language options for Chinese and English. Manufacturer: Chengdu Nimble Measure Tech. Co., Ltd. Timestamp: 2023/10/20 15:18:52. Includes a logo with a stylized red 'M'.