The dust particles concentration is measured using the laser scattering principle.

The transmitter is maintenance-free and has fast response, high sensitivity and an excellent stability.

The PM sensor can be operated in two ways:

• Continuous operating mode: the sensor is always active and measurements are continuously taken. In this mode at least 10,000 hours of PM sensor life are guaranteed.
• Discontinuous operating mode (default): the sensor is activated at regular intervals, when measurements has to be taken. This mode increases the PM sensor life.