Method and assembly comprising condensation particle counter, operating fluid, and carrier gas

Abstract

The invention relates to a method and an assembly comprising a condensation particle counter (1), an operating fluid (2), and a carrier gas (3) which flows through the condensation particle counter (1) along a main flow path (4) during a measurement operation. The condensation particle counter (1) has a saturator (5) and a nozzle device (6) which is arranged downstream of the saturator (5) along the main flow path (4) of the carrier gas (3) and opens into the enriched carrier gas (3), wherein the condensation particle counter (1) has a condensation region (9) which is arranged downstream of the nozzle device (6) for oversaturating the mixture containing the carrier gas (3), the operating fluid (2), and a measurement aerosol (8), and the condensation particle counter (1) has a measuring device (10) which is arranged downstream of the condensation region (9) along the main flow path (4) for detecting the measurement aerosol (8) particles enlarged by the condensed operating fluid (2). According to the invention, the carrier gas (3) is an inert gas, the operating fluid (2) is an alkane with the structural formula CnH2n+2 and an ordinal number n between 16 and 24, and the temperature ofthe carrier gas (3) is controlled to a condensation temperature of over 150 DEG C by the temperature-control assembly (11) in the condensation region (9) during a measurement operation.

Description

technical field [0001] The invention relates to a device comprising a condensation particle counter, an operating object and a carrier gas, wherein the carrier gas flows through the condensation particle counter along a main flow path during a measurement, wherein the condensation particle counter has a function for enriching the carrier gas with the operating object , especially a saturator that saturates a carrier gas with an operating object, wherein the saturator is at least partially filled with an operating object and passed through by the carrier gas during the measurement, wherein the condensation particle counter has a main flow path along the carrier gas in the saturator a nozzle device arranged afterward and leading to the enriched carrier gas, said nozzle device being connected to the measuring aerosol supply line and arranged to introduce the particle-laden measuring aerosol into the enriched carrier gas, Wherein the condensation particle counter has a condensatio...

AI Technical Summary

Problems solved by technology

[0005] However, in practice it has been found that other problems arise in HT-CPC which do not allow stable operation of

In the case of conventional HT-CPCs, damage can therefore unexpectedly occur on the saturator after already a short period of operation, which significantly reduces the measuring accuracy and service life of the HT-CPC

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