Abstract: A chromatographic assay test device for use with immunoassays. The test device has a sample collection member pivotally coupled to a test strip receiving member. The sample collection member has a window for applying a test sample to a pad accessible through the window and the pad is repositionable to an inverted position to contact a chromatographic member inserted into the test device. The chromatographic member is then brought into opposition to the sample collection member thus improving test performance by reducing the manipulation of samples. The test device is constructed from five interconnected panels which are die cut from SBS cardboard. The first panel has a window for inserting a test strip and the second panel has a window for viewing the test strip during the test procedure. The third panel has the repositionable pad section. The fourth panel has a window for applying the test sample and the fifth panel covers the test sample window.

Abstract: A chromatographic assay device for detection and/or determination of an analyte in a competitive immunoassay gives a semiquantitative or quantitative indication of analyte concentration in a single assay device while also giving a positive indication that flow has occurred properly through the device. In one form, the device comprises: (1) a first opposable component including a sample preparation zone and an absorber; and (2) a second opposable component including a first chromatographic medium with capture and detection zones, a second chromatographic medium with a comparison zone, and a comparison label. In another form, the second opposable component includes one chromatographic medium with capture, detection, and control zones. Test kits incorporating the devices and methods for their use are also disclosed.

Abstract: An automated analytical system module design essentially electrically isolates modular elements within the analyzer system with inter-module communications provided via packet-based communications. The modules may include a motor controller which estimates motor temperature to enable high initial torque with motor failure prediction and detection. The modules in such a system can be identified on serial communications loops by a module reset and count-off process.

Abstract: A probe washing apparatus including a probe having a tip and a wash collar having a bore coaxially aligned with the probe, the wash collar including ports for applying a vacuum and a wash liquid to the wash collar bore. The probe may be displaced vertically with respect to the wash collar to aspirate and dispense liquids, and the wash collar and probe are displaced together laterally. The steps of washing the probe tip include raising the probe to a position with the probe tip within the bore, applying vacuum to the bore, flushing the interior of the probe, and flushing the exterior of the probe.