Yunshis S20 Laser Distance Sensor 0.03–22 m, IP65, 9–35 V, Display, PNP/RS485/4–20 mA/UART

Overview

The Yunshis S20 is a laser distance sensor designed for medium-to-long range measurement up to 22 m, featuring a built-in numerical display, waterproof connector, and anti-sunlight interference for outdoor use. The S20 series offers multiple output/interface options (PNP, RS485, 4–20 mA, UART) to support different integration requirements.

Key Features

• Measuring range: 0.03–22 m (15 m under 160 kLux ambient light; 20 m on 10% reflectivity black target)
• Measurement frequency: 1–1000 Hz (default 100 Hz)
• Multi-target detection: Double Peak
• Temperature compensation: Yes
• Reflectivity calibration: Yes (deviation < 5 mm for different color targets)
• Withstands sunlight; works on dark/black targets
• Working laser: 905 nm, Class 1; indicator laser: 635 nm, Class 2
• Industrial protection rating: IP65
• Service life exceeds 50,000 hours

Specifications

Max. measurement distance	22 m
Strong light performance	15 m @ 160KLux strong light
Dark target performance	20 m @ 10% reflectivity of black target
Measurement frequency	1–1000 Hz (Default 100 Hz)
Repeatability	±8.0 mm @ 50–2000 mm
Repeatability	±20.0 mm @ 2000–6000 mm
Repeatability	±30.0 mm @ 6000–20000 mm
Absolute accuracy	±20.0 mm @ 200–2000 mm; Blind zone 20–200 mm with large error
Absolute accuracy	±30.0 mm @ 2000–6000 mm
Absolute accuracy	<1% @ 6000–20000 mm
Multi-target detection	Double Peak
Temperature compensation	Yes
Reflectivity calibration	Yes, deviation < 5 mm for different color targets
Blind zone	0.03 m
Working laser	905 nm, Class 1
FOV	<2°
Spot size	Dia 3.5 cm @ 1 m; Dia 11.5 cm @ 5 m; Dia 23 cm @ 10 m; Dia 50 cm @ 20 m
Indicator laser	635 nm, Class 2
Operating temperature	-20 to 50 °C
Storage temperature	-40 to 85 °C
IP rating	IP65
Operating voltage	DC +9–35 V
Operating current	107 mA @ 12 V (Indicator Laser On)
Operating current	103 mA @ 12 V (Indicator Laser Off)
Reverse polarity protection	Yes
Isolation	Yes
Interface / output options (S20 series)	S20-P (PNP); S20-R (RS485, Modbus RTU); S20-R1 (4–20 mA); S20-T (UART)

Mechanical (Drawing Notes)

• All units: mm
• Front view dimensions: 45 x 45
• Side view overall length: 49.5
• Additional marked dimensions/features: 13.5, 36, 35, 18.5, 2.75, R18, Dia 4, Dia 4.2, Dia 3, Dia 8
• Top panel: MODE button, SET button, numerical display

Applications

• Humanoid robots, quadruped robots, exoskeletons
• Robotic arms
• AGV vehicles, ARU robots
• Architecture and engineering
• Drone and aviation
• Smart home and security systems
• Liquid level monitoring
• Storage warehouse automation
• Robotic technology and general automation

For interface selection and integration support, contact [email protected] or visit https://voltaspir.com/.

Manuals / Documents

• Yunshis S20 Laser Distance Sensor-Drawing.pdf

Details

The Yunshis S20 laser distance sensor combines a built-in numeric display with outdoor-ready ranging up to 22 m.

Designed for industrial integration, the S20 module supports IP65 protection and a wide 9–35 V operating voltage.

Stable distance measurement in sunlight and on dark targets makes the S20 series a practical choice for mobile robots and outdoor systems.

Choose the output that fits your control stack, including PNP, RS485 (Modbus RTU), 4–20 mA, or UART variants in the S20 series.

Features like multi-target detection, temperature compensation, and reflectivity calibration help maintain reliable results across changing conditions.

Common use cases include drones, smart security, liquid-level monitoring, and warehouse automation.

Mounting dimensions and front-panel controls (MODE/SET with numerical display) support straightforward installation and setup.