A fluid particle-separating device includes a sorting, first and second diverting channels, a detector, a microprocessor, first and second actuators, and first and second sieving valves. A base may be coupled to each of the first and second chopstick members; wherein the base may include a first transition member. This screen is designed sharp or short. The contour portions fit at least partly into one another, to form a mechanical interference locking effective, at least in part, likewise in the direction of the longitudinal axis.