| 摘要 |
A syringe pump has a pusher ( 86 ) that pushes in the plunger ( 81 ) of a syringe ( 8 ) to dispense medication. A pivoted barrel size sensor arm ( 201 ) engages the syringe barrel ( 82 ) at one end ( 203 ) and carries three flags ( 207, 208 and 209 ) at the other end ( 205 ), which move across three sensors ( 217, 218 and 219 ) such that each sensor can change from a first state to a second state and back to a first state as the arm moves, to provide nine different size outputs.
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