A syringe pump has an arm swung against the barrel of the syringe.
The arm is coupled to a strip mask having a row of transparent apertures
of differing length. The mask extends above a CCD array of sensing
elements and below a concave mirror, which produces a collimated
beam of radiation on the mask from an LED. The length of sensing
elements exposed to radiation through an aperture in the mask gives
an approximate indication of barrel size; the position of an edge
of the aperture gives an accurate indication. The pump compares
the barrel size with information relating size to syringe type and
produces an indication of syringe type on a display.
A syringe pump infusion control set (10) includes a high cracking
bottle port check valve (22) and a low cracking patient port check
valve (50) by which to selectively and automatically couple a syringe
(40) to the fluid source (36) and the patient (58) with proper dynamic
response for an injection from the syringe (40).
A multiple probe liquid handler includes a syringe pump assembly
with multiple syringe pumps communicating with the probes. A carriage
movable with respect to a fixed support base carries syringe pump
pistons moving within syringe pump cylinders secured to the base.
A drive system including a single drive motor has a single drive
point connection to the carriage for moving the carriage and operating
the syringe pumps in order to draw fluid into or discharge fluid
from the multiple probes. A linear motion support assembly includes
spaced rails attached to the support base and slides attached to
the carriage and riding along the rails. The assembly includes two
parallel rails and three slides, one riding along one rail and two
riding along the other rail, providing an inexpensive yet imbalance
tolerant three point support.
The invention generally provides the apparatus for liquid delivery
comprising a syringe pump for reactant delivery and a syringe pump
for liquid chase material delivery.