| 摘要 |
A dispenser for a fluid medium, the dispenser comprising a first medium container (8) and a first servomotor-operated (2) piston pump (3) communicating therewith. According to the invention, it also comprises a second medium container (9), a second servomotor-operated (22) piston pump (23) communicating therewith, a feeding line (19) for connecting the output (13) of the first piston pump (3) to the second medium container (9) and a pump (20) for dispensing diluting agent of the medium to the second medium container (9), the output (39) of the dispenser being connected to the output (13, 33) of either the first or the second piston pump (3, 23).
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