Abstract: Provided herein are a system and method for using a microfluidics device. The system includes: a plurality of pumps and a plurality of sensors; a first communication line to select a pump from the plurality of pumps and select a sensor from the plurality of sensors; a second communication line selectively connected to the selected pump; and a third communication line selectively connected to the selected sensor.

Abstract: According to an example, a microfluidic apparatus may include a fluid slot, a foyer in fluid communication with the fluid slot via a channel having a relatively smaller width than the foyer, a sensor to detect a presence of a particle of interest in a fluid passing through the channel, a nozzle in fluid communication with the foyer, and an actuator positioned in line with the nozzle. The microfluidic apparatus may also include a controller to receive information from the sensor, determine, from the received information, whether a particle of interest has passed through the channel, and control the actuator to expel fluid in the foyer through the nozzle based upon the determination.

Abstract: Vented microfluidic reservoirs can include a housing and a vent coupled to the housing to vent air associated with a fluid sample communicated into the housing to an environment surrounding a microfluidic device coupled to the housing.

Abstract: Example sensor apparatus for microfluidic devices and related methods are disclosed. In examples disclosed herein, a method of fabricating a sensor apparatus for a microfluidic device includes etching a portion of an intermediate layer to form a sensor chamber in a substrate assembly, where the substrate assembly has a base layer and the intermediate layer, and where the base layer comprises a first material and the intermediate layer comprises a second material different than the first material. The method includes forming a first electrode and a second electrode in the sensor chamber. The method also includes forming a fluidic transport channel in fluid communication with the sensor chamber, where the fluidic transport channel comprises a third material different than the first material and the second material.

Abstract: Provided herein are a system and method for using a microfluidics device. The system includes: a plurality of pumps and a plurality of sensors; a first communication line to select a pump from the plurality of pumps and select a sensor from the plurality of sensors; a second communication line selectively connected to the selected pump; and a third communication line selectively connected to the selected sensor.

Abstract: A microfluidic diagnostic chip may comprise a microfluidic channel, a functionalizable enzymatic sensor in the microfluidic channel, the functionalizable enzymatic sensor comprising a binding surface to bind with a biomarker in a fluid, and a microfluidic pump to pass the fluid over the binding surface. A microfluidic device may comprise a number of pumps to pump a fluid though the number of microfluidic channels and a number of microfluidic channels comprising at least one sensor to detect a change in a chemical characteristic of the fluid in response to presence of the fluid on the sensor.

Abstract: An apparatus includes a chamber, a nozzle connected to the chamber, a fluid driver proximate the driver to expel fluid from the chamber through the nozzle, a microfluidic passage, an inlet connecting the microfluidic passage and the chamber, a sensor proximate the inlet to sense fluid within a fluid sensing zone within the inlet, and a particle aggregation limiter to control aggregation of particles within the sensing zone.

Abstract: A fluid testing cassette may comprise a microfluidic channel having a constriction and a micro-fabricated integrated sensor within the constriction. In one implementation, the constriction is less than or equal to 30 ?m. In one implementation, the cassette further comprises a nozzle connecting the microfluidic channel to the discharge reservoir, wherein a thermal resistor expels fluid within the microfluidic channel into the discharge reservoir.

Abstract: A microfluidic diagnostic chip may, in an example, include a number of microfluidic channels defined in a substrate each microfluidic channel fluidly coupled to at least one fluidic slot; the at least one fluidic slot to receive a number of fluids, and a number of gold sensors each gold sensor having a thickness of between 1500 and 5000 angstroms (?).

Abstract: Example implementations relate to coagulation sensing. For example, a microfluidic chip for coagulation sensing may include a microfluidic channel, an outlet at an end of the microfluidic channel having an air interface, and an impedance sensor located within the microfluidic channel and within a particular proximity to the air interface, the impedance sensor to determine a stage of a coagulation cascade of a blood sample flowing through the microfluidic channel to the impedance sensor.

Abstract: A digital dispense system and methods for preparing samples for analysis. The digital dispense system includes a fluid droplet ejection system housed in a housing unit. The fluid droplet ejection system contains a fluid droplet ejection head and fluid cartridge containing one or more fluids to be dispensed. A cartridge translation mechanism is provided for moving the fluid droplet ejection head and fluid cartridge back and forth over a sample holder in an x direction. A sample tray translation mechanism moves a sample tray back and forth beneath the fluid droplet ejection head and fluid cartridge in a y direction orthogonal to the x direction.

Abstract: Example implementations relate to a microfluidics sensing system. For example, a microfluidics sensing system may include a portable computing device to execute a microfluidics application, a microfluidic chip coupled to the portable computing device, the microfluidic chip including a microfluidic pumping and sensing region to perform a test on a biologic sample, and a printed circuit board (PCB) on a microfluidic reader to instruct the microfluidic pumping and sensing region to perform the test based on a command received from the microfluidics application.

Abstract: The present disclosure is drawn to microfluidic chips. The microfluidic chips can include an inflexible material having an elastic modulus of 0.1 gigapascals (GPa) to 450 GPa. A microfluidic channel can be formed within the inflexible material and can connect an inlet and an outlet. A working electrode can be associated with the microfluidic channel and can have a surface area of 1 ?m2 to 60,000 ?m2 within the microfluidic channel. A bubble support structure can also be formed within the microfluidic channel such that the working electrode is positioned to electrolytically generate a bubble that becomes associated with the bubble support structure.

Abstract: A device includes a microfluidic channel structure on a substrate and a first resistive structure on the substrate to control the temperature of at least the substrate. The first resistive structure is separate from, and independent of the, microfluidic channel structure. In some instances, the device includes a second resistive structure.

Abstract: A controller is connected to controlled devices on a microfluidic chip with a multiplexer. Signal transmission band width is differently allocated amongst the plurality of controlled devices on the microfluidic chip.

Abstract: A microfluidic diagnostic chip may comprise a substrate, a plurality of fluidic slots extending through the substrate, a plurality of microfluidic channels each coupled to a respective one of the plurality of fluidic slots to receive a plurality of fluids from the plurality of fluidic slots, and a mixing region in fluid communication with the plurality of fluidic slots to receive the plurality of fluids such that the plurality of fluids are to mix. A diagnostic chip may comprise a number of fluid slots defined through a substrate and a plurality of microfluidic channels coupled to the fluid slots to receive from the fluid slots a plurality of different fluids wherein the microfluidic channels combine and mix the plurality of different fluids.

Abstract: A method for handling multimode microfluidic data may output first signals from a first sensor on a microfluidic chip, may output second signals from a second sensor on the microfluidic chip and may output a single data stream from the microfluidic chip. The single data stream may include the first signals from the first sensor and the second signals from the second sensor. The method may further receive the single data stream from the microfluidic chip, route the first signals from the first sensor to a first data processing thread and route the second signals from the second sensor to a second data processing thread.

Abstract: A controller outputs control signals controlling a frequency source to selectively apply different nonzero frequencies of alternating current at different times to an electric sensor within a microfluidic channel.

Abstract: A fluid testing system comprises controlling hardware that serves to control an electric sensor on a fluid testing cassette. In one implementation, the controlling hardware is part of a cassette interface. In another implementation, the controlling hardware is part of the portable electronic device. In one implementation, the fluid testing system applies two different frequencies of alternating current are applied to two different electric sensors.

Abstract: A microfluidic diagnostic chip may comprise a main fluid channel comprising a main pump, a secondary fluid channel branching off from the main fluid channel, and a secondary pump within the secondary fluid channel wherein the secondary pump is to pull a particle of analyte of a first size from a fluid passing through the main channel, the fluid comprising particles of analyte of the first size and of a number of larger sizes. A method of analyzing an analyte on a microfluidic chip may comprise pumping, with a main microfluidic pump, a fluid comprising an analyte particle through a main microfluidic channel fluidly coupled to a fluid slot and sorting the analyte particle within the fluid through a secondary microfluidic channel by pulling the analyte particle into the secondary microfluidic channel with a secondary microfluidic pump.