Diluter to reduce quantity of micro particles in the air so as to facilitate calculation of concentration of the micro particles in the air

A diluter comprising:

• at least two filtering assemblies each having
• a top cap that is provided with a first connector formed on a top face of the top cap and a first through hole defined through the top cap;
• a lower cap having a second connector securely formed on a bottom face of the lower cap, a second through hole defined through the lower cap and an assembly hole defined to communicate with the second through hole;
• and
• a tubular filter securely connected between the top cap and the lower cap to form a mixing zone in communication with the first and the second through holes;
• and
• an intake assembly having a first end and a second end, the first end being defined with a receiving hole to correspond to the first connector and the second end being provided with an inlet to communicate with the first end and the second end,
• whereby after the first connector of one of the at least two diluters is received in the receiving hole of the intake assembly and the assembly hole of one of the at least two diluters receives the first connector of the other one of the at least two diluters, the second connector of the other one of the at least two diluters is adapted to connect to a particle counter, the particle counter is able to calculate the concentration of the particles in the air.