DNP digital system

The DNP digital (defined nano particle) series requires nitrogen or argon as the carrier gas for the generation of particles similar to diesel soot from graphite. Nitrogen has virtually the same properties as air, such that measuring devices calibrated to air do not require recalibration.Due to its excellent reproducibility and easy handling, the DNP digital is successfully used within the industry in combination with the REF 3000 reference exhaust to calibrate the PMP measurement chain in the particle measurement program.