The Dekati® High Temperature ELPI®+ (HT-ELPI®+) is a new version of the Dekati® ELPI®+ that enables real-time measurement of particle size distribution from 6 nm up to 10 µm with 10 Hz sampling rate. The High Temperature ELPI®+ allows direct measurement of up to 180 °C aerosol sample without the need to cool the sample, which makes the HT-ELPI®+ a tool to characterize high temperature aerosols. Additionally, the HT-ELPI®+ has all the benefits of the ELPI®+ system including real-time standalone operation, wide sample concentration range, wide particle size range and robust structure for operation even in harsh conditions.