20 Hz High-Accuracy 80 m Laser Sensor Range Finder Distance Measuring Module, TTL Serial Interface for Arduino

Overview

This Laser Sensor Range Finder Distance Measuring Module provides precise distance measurements from 0.01 m to 80 m with adjustable measuring frequency (5 Hz / 10 Hz / 20 Hz). It uses a TTL serial interface at 9600 bps for easy integration with microcontrollers, including Arduino. The module features a Class II laser (620–690 nm) and delivers high accuracy: ±1 mm (standard deviation) in single measurement mode and up to ±1 mm in continuous mode at the lowest frequency.

Key Features

• Measuring range: 0.01–80 m
• Adjustable measuring frequency: 5 Hz, 10 Hz, 20 Hz
• Accuracy (standard deviation): ±1 mm in single measurement mode
• Continuous mode accuracy: within ±1 mm at lowest frequency; approximately ±4 mm at 20 Hz
• Measurable velocity of moving objects: < 2 m/s
• TTL serial interface: 9600 bps, 8 data bits, 1 start bit, 1 stop bit, no parity
• Laser type: 620–690 nm; Laser class: Class II
• Power supply: DC 3–3.3 V; Typical current: 100 mA
• Distance unit: m; ASCII-formatted output

Specifications

Protocol Notes

• ADDR (device address): Default 80 (128).
• Position setting: Position is 1 (count from the top); when item is 0, count from the end (FA 04 08 01 F9). Default is counting from the end.
• CS (check byte): Sum all preceding bytes, return the inverse plus 1. In single and successive measurement data, the quotes are part of the data. Output format is ASCII; sample "123.456 m" displays bytes: 31 32 33 2E 34 35 36.

Protocol Commands

Factory read commands

Single measurement:    80 06 02 78
Continuous measurement: 80 06 03 77

Power and device settings

Shutdown device:        80 04 02 7A
Set address:            FA 04 01 80 81

Measurement adjustments

Distance modification -1: FA 04 06 2D 01 CE
Distance modification +1: FA 04 06 2B 01 D0
Time interval (1 s):      FA 04 05 01 FC

Start point

Top:       FA 04 08 01 F9
Back ends: FA 04 08 00 FA

Range presets

5 m:   FA 04 09 05 F4
10 m:  FA 04 09 0A EF
30 m:  FA 04 09 1E DB
50 m:  FA 04 09 32 C7
80 m:  FA 04 09 50 A9

Frequency presets

Lowest: FA 04 0A 00 F8
5 Hz:   FA 04 0A 05 F3
10 Hz:  FA 04 0A 0A EE
20 Hz:  FA 04 0A 14 E4

Resolution

1 mm:   FA 04 0C 01 F5
0.1 mm: FA 04 0C 02 F4

Auto start on power

Turn off: FA 04 0D 00 F5
Turn on:  FA 04 0D 01 F4

Operations

Single measurement (broadcast): FA 06 06 FA
Read cache:                     80 06 07 73
Control laser (open):           80 06 05 01 74
Control laser (close):          80 06 05 00 75

Notes

Measurement range and results can be affected by ambient light intensity, temperature (high or low), reflector strength, and target surface roughness. For higher output frequency, accuracy is reduced: at 20 Hz (FA 04 0A 14 E4) continuous measurement accuracy is about ±4 mm. At the lowest frequency (FA 04 0A 00 F8) continuous measurement accuracy is within ±1 mm. In single measurement mode (80 06 02 78), accuracy is always within ±1 mm.

Details

Laser ranging sensor offers 80m indoor, 20m outdoor range with ±1mm accuracy, imported chips, stable quality, USB-TTL interface, and auto programmer for reliable, high-performance operation.

Import lens and high-quality laser head enable accurate, stable measurement with ±1mm error, 0.5s speed, low power consumption, and long lifespan.

Laser ranging module uses 9600bps protocol with command and return codes, plus wiring for distance measurement, frequency, resolution, power control, and error handling.

High-accuracy 80m laser sensor technical dimensions and parameters