Colorlight SSR-PM PM2.5/PM10 Air Quality Sensor
The Colorlight SSR-PM is a particulate matter transmitter for monitoring PM2.5 and PM10 in air. It uses laser light scattering to estimate particle concentration and sends both readings through an RS485 interface using Modbus-RTU. Typical applications in the manufacturer’s specification include outdoor weather monitoring, dust monitoring, libraries, archives and industrial facilities.
Key features
- Measures PM2.5 and PM10 simultaneously over a stated 0–6,000 µg/m³ range for each channel.
- Provides 1 µg/m³ resolution and a listed accuracy of ±10%.
- Uses RS485 Modbus-RTU communication for integration with a compatible monitoring or display system.
- Includes a standard 5 m cable; the specified response time is no more than 90 seconds and warm-up time is no more than 2 minutes.
SSR-PM specifications
| Parameter | Specification |
|---|---|
| Measured particles | PM2.5 and PM10, simultaneous output |
| Measuring range | 0–6,000 µg/m³ for PM2.5; 0–6,000 µg/m³ for PM10 |
| Resolution and accuracy | 1 µg/m³; ±10% listed accuracy |
| Communication | RS485, Modbus-RTU; 4,800 bit/s default |
| Listed baud rates | 1,200 / 2,400 / 4,800 / 9,600 / 19,200 bit/s; confirm configuration for your system |
| Power | AC 100–240 V, 50/60 Hz power supply; DC 12 V, 2 A power adapter listed in the specification |
| Operating conditions | −20 to +60 °C; 0–80% RH |
| Response and warm-up | ≤90 s response; ≤2 min warm-up |
| Standard cable | 5 m |
Integration notes
Before connecting the SSR-PM to an LED display or monitoring installation, confirm that the receiving controller supports the sensor’s RS485 Modbus-RTU data and that its communication settings match. The specification lists RS485 configuration software but does not identify every compatible controller or provide a universal wiring diagram. Check the supplied documentation and the installation environment before ordering.
Frequently asked questions
Does the SSR-PM report both PM2.5 and PM10?
Yes. The manufacturer’s specification lists simultaneous PM2.5 and PM10 output, with a 0–6,000 µg/m³ range for each.
What communication interface does it use?
It uses RS485 with Modbus-RTU. The specification identifies 4,800 bit/s as the default baud rate; match the transmitter and receiving device settings during setup.
Is it ready for any outdoor location?
The manufacturer lists outdoor weather monitoring as an application, but the specification does not state an enclosure IP rating. Confirm mounting and weather protection for the intended site.
Conclusion
Choose the Colorlight SSR-PM when your project needs simultaneous PM2.5 and PM10 readings through RS485 Modbus-RTU. Verify controller compatibility, power and installation conditions against the specification before deployment.
Download the Colorlight SSR-PM specification
