The 7.951 VKL mini aerosol diluter is a modular aerosol diluter that can be used in conjunction with all GRIMM aerosol spectrometers. The complete system includes two dilution modules with variable intake nozzles (1:10 and 1:31.6) and a connecting block. Aerosol samples are diluted using the principle of an injector. Due to the modular design, two diluents are used, and the dilution ratio can be adjusted from 1:10 to 1:1000. VKL mini is a very flexible and compact system with good dilution effect and low compressed air consumption.

In order to ensure the accuracy and reliability of the system, it is necessary to ensure that the pressure of the undiluted sample before entering the diluter is consistent with the pressure after leaving the diluter after dilution.

The working principle of VKL mini diluter is based on the injection principle. The dilution gas without particulate matter enters the system through a circular hole at a predetermined pressure, and negative pressure is formed in the subsequent diffusion of the dilution gas, thereby inhaling a certain amount of sample gas through the aerosol inlet into the central area of the circular hole. The inner diameter of the aerosol inlet and the size of the circular hole determine the dilution ratio. The sample gas at the aerosol inlet must be in an unpressurized state, that is, at one atmosphere pressure. The positive and negative pressure at the aerosol inlet will change the dilution ratio. The sample gas and dilution gas flow enter the mixing and dilution chamber together and are then mixed. A small portion of the mixed gas is carried out from the outlet and can then enter the measuring instrument or another dilution system. The other excess gases are discharged without pressure through the adjacent outlet.

Compact design, lightweight

Modular design, adjustable dilution ratio

Low consumption of compressed air

Easy to operate, easy to change dilution ratio

Installation and maintenance do not require tools

Less particle damage

Dilution medium: Pure compressed air, with a maximum pressure of 8 bar. When entering the dilution gas inlet of the system, the pressure drops to 200 bar.

The entire dilution system is designed in a modular manner, with two dilution systems available (1:10 and 1:31.6), and the number of dilution modules (one or two) can be selected. Therefore, the possible dilution ratios are as follows:

The flow rate of each module is as follows:

Aerosol injection: 0.6 LPM (1:31.6), 1.89 LPM (1:10)

Compressed air injection: approximately 18 LPM (1:31.6), 16.9 LPM (1:10)

Aerosol sampling: 1.2 LPM

Excess mixed aerosol emissions: approximately 17.4 LPM (1:31.6), 17.6 LPM (1:10)

Repeatability: 5% maximum range

Temperature range: 0~+40 ° C

Pressure range: Pin=Pout

Relative humidity range:<95% (no condensation)

When in use, both the inlet and outlet of the sample gas must be in a pressure free state, and the excess mixture discharge port must also be in a pressure free state.