A probe apparatus disclosed for use in a separable connector includes an insulating body and spaced apart first and second electrical conductors in contact with the insulating body. A large-area screen and high-power loudspeakers effect a respective visual display and acoustic output of information previously received as video- or audio data via a data network to which the device is connected. The metal solution-diffusion membrane can be made with a very thin metal membrane layer with high permeability and possesses long-term stability as well as a great separation surfacevolume ratio. Each pixel of an image of the sample stained with the combination of the plurality of dyes is compared to the reference model, each pixel having a color defined by an RGB triplet, so as to determine an optimal combination of normalized RGB triplets from the respective correspondence tables of the dyes producing the color of the respective pixel. The portable transmitter includes a means for broadcasting a stop signal upon actuation of an operator actuatable stop member forming part of the transmitter. The focusing voltage Vf applied to the electrostatic lens with the accelerating tube 8 is controlled so that the unified evaluated value is increased.