State-of-the-art : Sampling of liquids during the technological process for the purpose of laboratory analyses in product quality control is usually done manually through a discharge valve on the pipeline or the tank, and the whole sample quantity is withdrawn at once. Manual sampling cannot yield satisfactory representative results, because a manually withdrawn sample represents a one-time product quality.

The essence of the Invention : The automatic sampling device allows programmed sampling throughout the technological process or at times when the samples are particularly relevant from the technological point of view. A sample obtained by withdrawing liquid medium in smaller quantities but with greater frequency represents the average product quality. Sampling can be conducted in operating conditions when the system is under pressure. The same device, if suitably connected, can be used for programmed dosing of various additives to the technological process.

The device for automatic and programmed liquid medium sampling and dosing is shown in the attached drawings: <BR> <BR> <BR> <BR> O Fig. 1-oross-sedion (sampling phasX <BR> <BR> <BR> <BR> <BR> # Fig. 2 - cross-section (sample storing phase)<BR> <BR> <BR> <BR> <BR> <BR> <BR> @ Fig. 3-cross-section (dosing phase) The device for automatic and programme liquid medium sampling and dosing, as shown in the attached drawings, consists of a housing accommodating the actuator piston (3) with gaskets, the sampler piston (4) with gaskets, the spring (8) with a

support, the spring (10) with a support, the seat (11) with a bore, and the pin (9). Over the tube connection (13) and the valve (6) the device is attached to the pipeline. The tube connection (13) contains the drip trap (7) with one axial bore and several radial bores.

The device in sampling operation The electronic programmer (1), fed by control voltage, operates the electromagnetic distributor (2) which has three attachments : A, B, C. Attachment (C) is connected to compressed air or some other neutral gas under pressure serving for drive of the piston (3) and the piston (4). When the electromagnetic distributor is not under voltage, (B) and (C) are connected, the chamber (5) is under atmospheric pressure and the spring (8) holds the piston (3 and the piston (4) in the upper position, whereas the spring (10) holds the pin (9) pressed to the seat (11).

Medium from the pipeline, through the drip trap (7) and the plug valve (6), fills the chamber (14). When the electromagnetic distributor (2) is energized by the electronic programmer (1), (A) and (B) are connected and the liquid pressure works on the piston (3) which overpowers the spring (8) and forces the piston (4) down into the lower position; the liquid from the chamber (14) is forced out through the opening in the seat (11) into the vial (12). Then the electronic programmer (1) de-energizes the electromagnetic distributor (2), (B) and (G) are connected, the chamber (5) is discharged and the pistons (3) and (4) return to their original positions, while the chamber (14) is ready to take another portion of the medium. Sampling is repeated in the described sequence and as adjusted on the programmer.

When used as a doser, the device operates in the same way, except that now the process connection (7) is attached to the vessel containing dosing medium, and the sampler outlet is attached to the process connection at the point where liquid is injected.

Instructions for optimum industrial application In the fabrication of the Invention materials should be chosen which can with hold pressures occurring in the system as well as the chemical properties of the tested medium.