Abstract: The invention relates to a kind of volumetric pipet. It includes an outer casing. At the lower part of the outer casing, there is a fetching mouth which is detachably mounted to a liquid container. At the top of the outer casing, there is a detachably sealed top cover. Inside the outer casing, there is a hollow core with a top opening. There is an inlet mouth on the side wall of the core that corresponds to the fetching mouth. The internal wall of the outer casing can slide against the external wall of the core. The core's rotating or sliding along its longitudinal orientation makes the fetching mouth and the inlet mouth correspond or stagger. This invention provides an easy-to-operate, precise rationing, quick and sanitary volumetric pipet.

Abstract: In a liquid handling system including a liquid handling substrate having a plurality of channels for conducting a liquid sample in said substrate, where the channels terminate in a plurality of exit ports in an outer surface of the substrate for transfer of a quantity of the liquid sample. The handling system also includes a liquid storage and dispensing substrate having a plurality of separable cartridges corresponding to the channels, with each cartridge terminating at a microelectro mechanical system (MEMS) comprising a laminate of glass, silicon and a piezoelectric substance. The handling system further includes a liquid detecting system comprising a light emitting diode and a photo-detector, where each channel includes a reservoir in communication with a corresponding cartridge creating an interface therebetween.

Abstract: A pipette has a tip having at the front end thereof an inlet/outlet hole through which a liquid is sucked up and delivered. The pipette is fitted at an opening formed therein with an air passage through which air is sucked out from inside the pipette tip or supplied into the pipette tip. The pipette includes an inflatable member secured to the pipette body and which can be inflated with a fluid charged therein. The pipette body has formed therein separately from the air passage a fluid passage through which a fluid is charged and discharged. The inflatable member when charged with the fluid through the fluid passage in the pipette body and thus inflated closely adheres to the inner wall or outer surface of the top end portion of the pipette tip where the opening is formed, to thereby securely catch the pipette tip.

Abstract: An automatic immunoassay method and apparatus which not only permit automatic operations of supplying and discarding reaction tubes, washing for B/F separation, dispensation of reagents, and measurement, but also permit the reaction time to be varied arbitrarily and can cope with any of the assay techniques including one-step and two-step noncompetitive sandwich techniques and competitive techniques.

Abstract: The invention herein describes a device for fabricating microarrays of biochemical substances, consisting of a holder and one or more printing pins. The holder contains apertures with regular spacing that define the location of one or more printing pins during the printing process. The tip of each printing pin contains a sample channel that holds a predetermined volume of biological or chemical sample and a point that is machined to precision with an electronic discharge machine (EDM). The device can be attached to a motion control system for precise and automated movement in three dimensions. The flat tips of the pins are immersed in a biochemical sample such that a predefined volume of sample fills the sample channel of each pin. The holder and pins are then moved in proximity to a printing substrate whereby direct contact between the flat tips of the pins and the surface results in the transfer of a small amount of the sample onto the solid surface.

Abstract: There is provided a burette apparatus having a delivery tube connecting a fluid bag to a burette assembly, via a fluid entry spigot formed in an end cap assembly of the burette assembly, the end cap assembly having a bypass spigot connected to the delivery tube and usually closed by clip, to allow an override for adding liquid to the burette. The end cap assembly closes the upper end of the transparent, cylindrical burette body, into which extends a stainless steel tube extension of the fluid entry spigot, the lower end of the burette body being closed by a lower closure assembly having a check valve and a drip chamber. An outlet tube passes from the drip chamber to the patient via regulating clamp. A float assembly is located in the burette body including an extension rod provided with a resilient cup adapted to engage the open end of the stainless steel tube extension.