A finger-type peristaltic pump comprising a body and a conduit-containing housing; wherein said body containing two or more finger-type valves, whereby each valve has a respective finger having an extended position and a retracted position; each of said fingers corresponds to a finger hole located in the upper surface of said conduit-containing housing; said fingers, when in their extended position, extend through their respective finger holes into said conduit-containing housing to compress a region of said conduit in said passageway; wherein the pump additionally comprises a processor configured to operate said fingers according to a predetermined temporo-spatial pattern, and wherein said conduit-containing housing is completely detachable from said body of the pump, enabling two configurations ( i) attached to said body or ( ii) completely detached and carried separately, and said conduit-containing housing having a passageway configured to receive a conduit and additionally comprising an anti-free flow mechanism to prevent the flow of fluid in the segment of the conduit in the housing when the housing is not in a closed position; characterized in that the anti-free flow mechanism has a non-obstructing position in which the anti-free flow mechanism does not prevent flow in the conduit and an obstructing position, in which the anti-free flow mechanism prevents flow in the conduit, and that the conduit-containing housing is hinged to the body and swings around a hinge between an open position, in which the conduit is not adjacent to the fingers, and the closed position, in which the conduit is adjacent to the fingers, and the anti-free flow mechanism being spring biased in the obstructing position, so that when the conduit-containing housing is swung away or detached from the body of the pump, the anti-free flow mechanism spontaneously assumes its obstructing position and the anti-free flow mechanism comprises an occluding plate having a hole through which the conduit passes and an actuating tab for sliding the occluding plate between obstructing and non-obstructing positions whereby the hole is D-shaped, whereby the D-shaped hole has a straight bottom edge and an upper arcuate edge, wherein the conduit-containing housing comprises supports preventing bulging of the conduit in the passageway, whereby the conduit is supported in the passageway by one or more supports whereby the supports prevent bulging of the conduit between two fingers in the extended state, whereby the passageway comprises holes, whereby the cross-sectional shape of the passageway is determined by the shape of the holes in the supports, whereby the holes of the passageway are D-shaped having a straight upper edge and an arcuate lower edge, wherein the anti-free flow mechanism has an obstructing state, an unlatched non-obstructing state and a latched non-obstructing state, whereby in the obstructing state, the occluding plate is spring biased by means of springs such that the occluding plate is slidable from an obstructing position and a non-obstructing position, whe rein in its non-obstructive position, the hole of the occluding plate is essentially aligned with the passageway, so that the conduit is unobstructed, wherein in its obstructing position, the hole and the passageway only partially overlap, whereby the hole comprises a straight edge and the passageway comprises a straight edge so that the conduit is collapsed between the straight edge of the hole and the straight edge of the passageway, the conduit thus being obstructed, which prevents unintentional flow of fluid in the conduit when the housing is swung out from the body. ( i) attached to said body or ( ii) completely detached and carried separately, and