Abstract: A power meter includes a current sensor sensing a current of a conductor signal transmitted along a conductor and outputting a current signal based on the current, a voltage sensor sensing a voltage of the conductor signal and outputting a voltage signal based on the voltage, and a controller receiving the current signal and the voltage signal and calculating a power factor of the conductor signal based on the current signal and the voltage signal. The controller determines an operating state of a powered device to which the conductor feeds the conductor signal based on the power factor.

Abstract: A power meter includes a housing attached to a conductor, a hall-effect current sensor disposed in the housing and contactlessly sensing a current of a conductor signal transmitted along the conductor, and a voltage sensor disposed in the housing and contactlessly sensing a voltage of the conductor signal.

Abstract: The present invention relates to electromechanical device status monitoring and equipment protection applications for industrial automation, HVAC, and other implementations; and, more particularly, to the use of current sensing devices to detect loss-of-flow conditions. Presently described embodiments can comprise simplified, compact current sensing devices that can be economical to build, inventory, distribute, and purchase. Present embodiments can easily be calibrated and/or set by hand prior to installation, and they can be configured for automatically offering proof-of-flow detection based, at least in part, on the initially provided setting.

Abstract: Pressure sensors are configured for accurate, non-position sensitive pressure measurement. They can offer microprocessor-based features for optimized measurement, control, and signaling using precision-calibrated silicon piezoresistive microelectromechanical (MEMS) sensors provisioned within a durable, versatilely mountable housing. Such sensors can be mounted readily in alternate locations, configurations, and/or positions. They can also offer real-time temperature compensation, enable selectable analog outputs (such as 2-wire mA, 3-wire mA, or 3-wire V signals), enable adjustable range or subrange selection, support uni- or bi-directional settings, and allow local (pushbutton) or remote (via dry contacts) zeroing for accuracy.