Abstract: A system and method is described that enables an observer to quickly and easily identify specific and individual distributed electronic devices from a collection of dozens, or with variations up to hundreds of thousands. The solution is simultaneously active on all of the devices, is reconfigurable at any time, and only requires specifically defined colored optical patterns generated at each device to be in the observer's visual range. Implementable with a single LED display the system is easily adapted to limited space applications and incurs minimal cost.

Abstract: A compact ECG snap connector is disclosed. A channeled U shaped body is formed from a thin sheet of electrically conductive and resilient material. The body is dimensioned to be compatible with standard ECG snap connector pins, and can be fastened to a printed circuit board. Fixed structures located in proximity to the channeled U shaped body provide mechanical restrictions on the expansion and contraction of the channeled U shaped body's aperture.

Abstract: A gas delivery system accurately measures and optionally regulates mass flow rate in real time. A fluid conduit connects an inlet valve, calibration volume, flow restrictor, and outlet valve in series. Pressure and temperature sensors are coupled to the calibration volume. One or more pressure sensors may be attached across the flow restrictor. Alternatively, an absolute pressure sensor may be attached upstream of the flow restrictor. One embodiment of differential pressure sensors comprises a floating reference differential pressure sensor, including a first transducer attached to the fluid conduit upstream of the flow restrictor and a second transducer attached to the conduit downstream of the flow restrictor. In this embodiment, each transducer receives a reference pressure from a reference source, and optionally, after the calibration volume is charged, the floating reference differential pressure transducers are calibrated.

Abstract: Temperature compensation circuitry employing a single temperature compensation element is disclosed. By use of a single temperature compensation element, the effects of temperature on both zero offset and signal gain of a sensor may be adjusted. In addition, the circuit provides the unique capability of employing a single temperature compensation element while permitting for the independent adjustment of compensation of zero offset and signal gain.

Abstract: A single module for relay, limit switch or related devices for self-powering the set of contacts and sensing the state of the contacts, compatible with Opto 22 and related I/O systems interfacing microprocessors and industrial processes and the like and with further features, if desired, of a single isolation device for both power and signal isolation such as a transformer, preferably employing conversion to D.C. in the tranformer output and optional resonant mode flyback pulses to step up the primary drive voltage.