A microfluidic die is disclosed that includes a plurality of heaters above a substrate, a plurality of chambers and nozzles above the heaters, a plurality of first contacts coupled to the heaters, and a plurality of second contacts coupled to the heaters. The plurality of second contacts are coupled to each other and coupled to ground. The die includes a plurality of contact pads, a first signal line coupled to the plurality of second contacts and to a first one of the plurality of contact pads, and a plurality of second signal lines, each second signal line being coupled to one of the plurality of first contacts, groups of the second signal lines being coupled together to drive a group of the plurality of heaters with a single signal, each group of the second signal lines being coupled to a remaining one of the plurality of contact pads.

A system and method for tagging, tracking, locating and identifying people and vehicles transporting people using Perfluorocarbon tracers. An on-going problem faced by military as well as law enforcement personnel is that of friendly fire incidents. To prevent possible friendly-fire incidents, troops would separate the two layers of the uniform patch, thereby releasing a controlled release of the Perfluorocarbon vapors. Other friendly troops, equipped with sensors tuned to the specific perfluorocarbon characteristics would thus be able to literally view a plume around the tagged person or object. The system may conversely be used to tag enemies. Formulations of mixed perfluorocarbons may be used to provide coding of emissions.

A secondary ultrasonic nebulisation device is disclosed comprising: a liquid sample delivery capillary; a sample receiving surface arranged for receiving a liquid sample from the capillary; and an ultrasonic transducer configured for oscillating the surface so as to nebulise the liquid sample received thereon, wherein the device is configured such that the oscillations of the surface by the ultrasonic transducer cause charged droplets and/or gas phase ions to be generated from the sample.

A method of prepping a cylindrical inner surface of a bore using a high-frequency forced pulsed waterjet apparatus entails generating a pressurized waterjet using a high-pressure water pump, generating a high-frequency signal using a high-frequency signal generator, applying the high-frequency signal to a transducer having a microtip to cause the microtip to vibrate to thereby generate the high-frequency forced pulsed waterjet, and rotating the rotatable ultrasonic nozzle inside the bore to prep the inner cylindrical surface of the bore using the high-frequency forced pulsed waterjets exiting from the angled exit orifices of the rotatable ultrasonic nozzle.

An ultrasonic injection device and methods of use are presented. The ultrasonic injection device comprises a housing, an injection nozzle attached to the housing, an ultrasonic vibration generator attached to the housing, and a pressure applicator. The injection nozzle has a number of openings configured to dispense a fluid. The ultrasonic vibration generator is configured to apply ultrasonic energy to fluid within the injection nozzle. The pressure application is configured to propel the fluid towards and out of the number of openings.

In a nebulizer of the present invention, a main body is being mounted with a power supply unit and an oscillation unit generating an oscillation output including a first frequency component and a second frequency component different from each other. A first replacement member is being mounted with an atomization unit configured to atomize, using the first frequency component, a first liquid that is supplied. A second replacement member is being mounted with an atomization unit configured to atomize, using the second frequency component, a second liquid that is supplied. The first and/or the second replacement members include a functional unit configured to operate with an additional frequency component different from the first and second frequency components. A replacement member attached to the main body receives the oscillation output including the first, second and additional frequency components from the main body.

Disclosed is an integrated spray machine which comprises a shell, a sprayer assembly, an air pump motor assembly, a battery, a circuit board and a switch, wherein the sprayer assembly comprises a housing, a container and a spray mechanism; the housing is matched with the shell, the container and the spray mechanism are mounted in the housing correspondingly, and the container communicates with a liquid inlet of the spray mechanism; the air pump motor assembly, the battery and the circuit board are all arranged in the shell, the switch is arranged on the wall of the shell, the air pump motor assembly, the battery and the switch are all electrically connected with the circuit board, and an air outlet of the air pump motor assembly communicates with an air inlet of the spray mechanism through an air pipe.

A microfluidic cartridge is provided. The microfluidic cartridge includes a reservoir for containing a fluid composition, a first face, and a second face joined with the first face. The electrical circuit has a first end portion and a second end portion. The first end portion of the electrical circuit is disposed on the first face and the second end portion of the electrical circuit is disposed on the second face. The first end portion includes electrical contacts and one or more circuit minor openings that are configured to mate with minor guideposts on the housing of a microfluidic delivery device. The microfluidic cartridge may include one or more major openings that are configured to mate with major guideposts on the housing. The microfluidic cartridge includes a microfluidic die disposed on the second face.

Embodiments of the present invention disclose an atomizer of electronic cigarette and electronic cigarette. The atomizer comprises a housing; the housing is in fixed connection with a suction nozzle; an ultrasonic atomization piece is fixed in the housing; the ultrasonic atomization piece comprises a solid piezoelectric ceramic piece; one surface of the solid piezoelectric ceramic piece is in contact with a liquid guide structure, and the other surface thereof is in contact with solid perfume; the liquid guide structure communicates with a tobacco tar storage cavity; both of the liquid guide structure and the solid perfume communicate with an airflow passage; and an air inlet of the airflow passage communicates with the outside of the housing, and an outlet of the airflow passage communicates with the suction nozzle.

A sprayer that senses the presence or character of a surface to be sprayed includes one or more sensors configured to detect a presence or character of a surface to be sprayed; and a dispenser assembly including one or more components configured to modify at least one spray characteristic of a formulation based on an input from at least one of the one or more sensors indicative of the presence or character of the surface to be sprayed.