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Neilsen Kuljian

AS0 series low-current current sensing switches are specialized current sensing switches that combine an ultra-sensitive current transformer and signal conditioning electronics into a single package for sensing AC current from 3-350 mA.

Useful for signal or lamp status monitoring, detecting low level fault currents or fan status proofing, the AS0 series features solid-state outputs and jumper-selectable ranges, which make it a versatile choice for low-current status indication applications.

Neilsen Kuljian AS0 Series Ultra-Low Current Operated Switch Distributor

AS0 Series

Operating Instructions

AS0 series are solid-state current switches. They operate (switch) when the current level through the hole exceeds the adjustable setpoint.

AS0 series sensors work in the same environment as motors, contactors, heaters, pull-boxes, and other electrical enclosures. They can be mounted in any position or hung directly on wires with a wire tie. Just leave at least one inch distance between sensor and other magnetic devices. Run current carrying conductor through the opening in the sensor. Connect power wiring to the sensor. Be sure that the power supply matches the power rating on the sensor label. Use up to 14 AWG copper wire and tighten terminals to 7 inchpounds torque.

If you are looking for NK Technologies AS0 Series Current Sensing Switch, please call us on (800) 894 - 0412 or email us at we will do our best to help you find the NK AS0 series current sensing switch that you are looking for at the most competitive prices possible. If you are searching for Neilsen Kuljian AS0 series current sensing switch technical information (data-sheets) please use the datasheets or product selection guide page links.


  • Fan Monitoring
    • Fan status in heating and drying applications.
    • Identify lamp outages or other malfunctions through changes in current consumption.
  • Fractional HP Motors
    • Ideal for monitoring small motors used in critical applications, for example, fan status proofing on a crucial cooling fan.
  • Fault Current Sensing
    • Detects extremely low levels of current resulting from fault conditions.


  • Wide Range of Output Options
    • Dependable, solid-state relay N.O. or N.C. contacts rated at 240 VAC or 30 VDC.
    • Compatible with most automation controllers.
  • Isolated Inputs and Outputs
    • Inductive sensing eliminates insertion loads on monitored circuits, effectively isolating it from the unit.
    • Isolated outputs simplify wiring and enhance safety.
  • Adjustable Setpoints
    • Setpoints are field-adjustable from 3 mA to 350 mA, speeding installation and allowing for tailored applications.
  • UL, CUL and CE Approval
    • Accepted worldwide.

Our industrial factory automation supplies distributors warehouse in Boise, Idaho stocks some NK Technologies products enabling us to further assist you in finding the correct AS0 series current switch for your application in the USA, Canada and Mexico. Whether we have AS0 series current switch in stock in Boise, Idaho or need to ship direct from NK Technologies to any USA cities; Clearwater Tech can get Neilsen Kuljian AS0 series current switches to you fast and save money! It will be very helpful if you have the AS0 series current switch part numbers ready, then our sales representatives can provide you with a pricing and availability quote for AS0 series current sensing switch that you are looking for in seconds. If you do not have the part numbers for AS0 series very low AC current sensing switch, our application engineers will be able to help you figure out the part numbers and get the price quote to you as soon as possible.

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