Filtration device

A filtration device comprising:

• (a) a first channel member including:
• (i) a recess recessed inward from an outer wall surface;
• (ii) a groove formed in a recessed surface of the recess, the groove having an opening;
• (iii) first and second channels defined by respective through-holes connected to the groove;
• (iv) a first connection part connecting the groove with the first channel;
• and
• (v) a second connection part connecting the groove with the second channel;
• (b) a second channel member removably connected to the first channel member, the second channel member having a projection which includes a projection surface that cooperates with the recess of the first channel member to define a third channel located between the first and second channels of the first channel member, the third channel being connected to the first channel via the first connection part and being connected to the second channel via the second connection part, the third channel having a smaller cross-sectional area than the first channel, the second channel member including a discharge channel located in the projection and having an opening that extends through the projection surface;
• and
• (c) a filter positioned at the opening of the discharge channel such that the filter is located along the third channel,
• wherein:
• the recessed surface of the recess of the first channel member defines a flat surface;
• the projection surface of the projection of the second channel member defines a flat surface;
• and
• the first channel member and the second channel member are mated with each other by bringing the recessed surface of the recess and the projecting surface of the projection into surface contact with each other.