Operating Principle

The operation principle of the DAD-100 is based on axial dilution of the sample in which the dilution air is introduced as ‘sheath flow’ around the raw sample. This type of dilution is beneficial due to very low losses for all particle sizes. In order to calculate the dilution ratio, the amount of sample drawn by the measurement instruments and the flow of dilution air need to be know accurately. The amount of dilution air is controlled accurately in the DAD-100 with a high-quality needle valve, which is adjusted and locked into place during calibration at Dekati. If the DAD-100 is used with Dekati instruments, the amount of drawn sample is very accurately known and can be found in the instrument specific data sheet. The DAD-100 is delivered with an a calibration certificate and an easy-to-use Excel sheet which can be used to calculate the dilution ratio in any conditions.