NK Technologies’ redesigned ASM Series Smart-Switch product line measures and uses actual load current to provide a simple, safe method to ensure that a motor is working properly. The current sensing Smart-Switches are self-powered and self-calibrating to speed start-up and minimize installation costs. Three models are available to provide status monitoring, overload or underload, or operating window (overload and underload) functionality to suit a particular pump, fan, heating element, conveyor or multi-load safety-interlocked application. The output contact is AC and DC compatible for use with any automation system. As described by NK Technologies, the ASM series’ sensor automatically locks onto the normal current level, then self-learns and determines a limit-alarm trip point to help users take corrective action before a failure occurs. The ASM sensor slides or snaps over one conductor feeding the load. If the load draws more current than normal or the current drops significantly, the sensor contact will open. Should a motor need to be replaced, recalibration is quick and within a matter of minutes the system is back in operation. www.nktechnologies.com

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