The pDR-1500 is a portable dust measuring instrument with increased accuracy and extended application possibilities. It is equipped with humidity and temperature compensation. Small and light, easy to use and long lasting, it is the ideal instrument for real-time applications in occupational hygiene and health protection. An integrated filter enables subsequent gravimetric validation of the data. The device can be used with different cyclones for PM 10 to PM 4 and PM 4 to PM 1 or also without cyclone.