Dragino WSS-23, CO2 and particulate matter sensor PM2.5/PM10, RS485

The Dragino WSS-23 records CO2 concentration as well as PM2.5 and PM10 fine dust fractions simultaneously in one device. CO2 is measured using the NDIR method with internal temperature compensation, and fine dust is measured via laser scattering. A weather-resistant protective housing shields the measuring technology from UV radiation and sunlight, and connection is established via RS485 to the Dragino WSC2-L weather station.

Key features:

• Three measured variables in one device: CO2, PM2.5 and PM10
• CO2 measurement based on the NDIR principle (non-dispersive infrared absorption) with internal temperature compensation
• Fine dust measurement via laser scattering
• Weather-resistant protective housing against UV radiation and sunlight
• RS485 interface with Modbus command set, operable directly on the WSC2-L main unit (standard baud rate 4800)

Specifications:

CO2

• Measurement principle: NDIR with temperature compensation
• Measurement range: 0 to 5000 ppm
• Resolution: 1 ppm
• Accuracy: ±3 % of full-scale value at 25 °C (corresponds to ±150 ppm)
• Operating temperature: 0 °C to +50 °C
• Operating humidity: 0 to 95 % RH

PM2.5 / PM10

• Measurement principle: Laser scattering
• Measurement range: 0 to 1000 µg/m³
• Resolution: 1 µg/m³
• Accuracy: ±3 % of full-scale value at 25 °C (corresponds to ±30 µg/m³)
• Operating temperature: -30 °C to +50 °C
• Operating humidity: 15 to 80 % RH, non-condensing

General

• Supply voltage: 7 to 24 V DC
• Current consumption: 50 mA at 12 V
• Warm-up time: 3 min
• Interface: RS485
• Standard baud rate (with WSC2-L): 4800
• Dimensions: 24 × 24 × 15 cm
• Weight: 1248 g
• Scope of delivery: 1 × WSS-23

Note: The CO2 measurement is specified for temperatures from 0 °C, and the fine dust measurement for non-condensing conditions up to 80 % RH. The measured values are suitable for trend observation and monitoring, not for official air quality measurements according to reference methods.

Fields of application:

• Greenhouses for monitoring CO2 concentration, e.g., for CO2 fumigation to promote growth
• Agricultural and environmental weather stations based on the Dragino WSC2-L as a supplement for air quality data
• Dust monitoring on construction sites, industrial and factory premises, e.g., for detecting dust events during material handling
• Municipal and industrial measuring networks for broad, indicative detection of fine dust trends

Documents:

User Manual