Abstract: A fluid sensor assembly including a fluid sensor, an antenna, and a processor in wireless communication with the fluid sensor assembly and comprising a reader. The fluid sensor can be positioned along a fluid flow line. The fluid sensor can be configured to output one or more output signals indicative of one or more properties of the fluid flowing through the fluid sensor. The antenna of the fluid sensor assembly is configured to transmit the output signals to the reader of the processor; and the processor is configured to process the signals received by the reader.

Abstract: A fluid monitoring system for determining a property of a test fluid comprises a main fluid flow path through which a test fluid can flow; a primary sensor set comprising a primary sensor configured to provide a primary measurement signal indicative of a first property of a test fluid flowing through the main fluid flow path; a secondary sensor set for use in calibrating the primary sensor set, the secondary sensor set comprising a secondary sensor configured to provide a secondary measurement signal indicative of the first property of the test fluid, wherein the system is configured such that the secondary sensor set can selectively interact with test fluid; and a control unit configured to: acquire a first measurement based on the primary measurement signal and acquire a second measurement based on the secondary measurement signal; compare the first measurement and the second measurement in a calibration operation to determine an adjustment for calibrating the primary sensor set based on the secondary senso

Abstract: Methods and devices for detecting a property of a fluid inside a cartridge is disclosed herein. An electronic reader can be configured to electrically connect to a cartridge and detect the property of the fluid inline. The electronic reader can measure a voltage of the fluid inside the cartridge to determine an impedance of the fluid at a first time point. The electronic reader can use the determined impedance of the fluid and an impedance of a calibration resistor to get a first impedance ratio at the first time point. The electronic reader can then compare the first impedance ratio with a second impedance ratio determined at a second time point to evaluate whether the fluid inside the cartridge is still effective for its intended purpose.

Abstract: A fluid sensor device can include a housing having an inlet and an outlet. The housing can have a fluid reservoir, a sensing assembly, a plunger, a valve, and a plurality of channels. The fluid sensor module can be used to sense constituents in a sample fluid (e.g. patient's blood or dialysate) during a treatment process, such as kidney dialysis procedures. The fluid sensor module can be connected in-line to a medical device to sense the sample fluid.

Abstract: A fluid sensor system that is configured to perform in-line monitoring is disclosed. The fluid sensor system can include a sensor module that includes a sensing channel configured to receive a sample fluid, two or more calibration compartments, and a sensing element configured to interact with the sample fluid in the sensing channel. The fluid sensor system can include a reader that is electrically and mechanically coupled to the sensor module. The reader includes a controller that is configured to control operation of the fluid sensor system.

Abstract: Various examples are directed to a measurement system for measuring an electrical property of skin comprising an excitation circuit, a receiver circuit, and a sequencer circuit. The excitation circuit may generate a periodic excitation signal that, when provided to the skin, generates a response signal in the skin indicative of the electrical property. The sequencer circuit may be configured to activate the excitation circuit to provide the excitation signal to the skin. While the excitation circuit is activated to provide the excitation signal to the skin, the sequencer circuit may activate the receiver circuit to execute a first sample cycle to generate a first plurality of samples of the response signal. A first value for the electrical property of the skin may be determined based at least in part on the first plurality of samples of the response signal.

Abstract: Subject matter herein can include identifying a biochemical test strip assembly electrically, such as using the same test circuitry as can be used to perform an electrochemical measurement, without requiring use of optical techniques. The identification can include using information about a measured susceptance of an identification feature included as a portion of the test strip assembly. The identification can be used by test circuitry to select test parameters or calibration values, or to select an appropriate test protocol for the type of test strip coupled to the test circuitry. The identification can be used by the test circuitry to validate or reject a test strip assembly, such as to inhibit use of test strips that fail meet one or more specified criteria.

Abstract: Various examples are directed to a measurement system for measuring an electrical property of skin comprising an excitation circuit, a receiver circuit, and a sequencer circuit. The excitation circuit may generate a periodic excitation signal that, when provided to the skin, generates a response signal in the skin indicative of the electrical property. The sequencer circuit may be configured to activate the excitation circuit to provide the excitation signal to the skin. While the excitation circuit is activated to provide the excitation signal to the skin, the sequencer circuit may activate the receiver circuit to execute a first sample cycle to generate a first plurality of samples of the response signal. A first value for the electrical property of the skin may be determined based at least in part on the first plurality of samples of the response signal.

Abstract: Subject matter herein can include identifying a biochemical test strip assembly electrically, such as using the same test circuitry as can be used to perform an electrochemical measurement, without requiring use of optical techniques. The identification can include using information about a measured susceptance of an identification feature included as a portion of the test strip assembly. The identification can be used by test circuitry to select test parameters or calibration values, or to select an appropriate test protocol for the type of test strip coupled to the test circuitry. The identification can be used by the test circuitry to validate or reject a test strip assembly, such as to inhibit use of test strips that fail meet one or more specified criteria.