The present invention generally relates to a method for rapidly counting micron andor submicron particles by passing such particles through any of a plurality of orifices simultaneously with an ion current and measuring the signal generated thereby. The apparatus performs wireless communication with the communication terminal by a first wireless communication mode and performs wireless communication with the communication terminal by a second wireless communication mode in which either the communication apparatus or the communication terminal becomes an access point. A stand is provided for supporting the base, and is preferably secured to the base.