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Weschler Instruments is a manufacturer and distributor of electrical and electronic measurement equipment. Customers worldwide use our products in power plants, steel mills, chemical plants, paper mills and other industrial applications that require rugged, reliable and accurate instrumentation.
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NK Technologies AC Current Switches

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NK Technologies Smart AC Current Switches - ASM series


NK Technologies ASM Series Load Monitoring Switches are designed for overload, underload or operating window applications. This Self Calibrating Smart-Switch uses the actual load current to set the trip point.


   Solid-Core: 1.5 - 150A

   Split-Core:  2.8 - 150A

• Self-calibrating trip points
• Over, under or over/under ...

NK Technologies AC Current Switches

NK Technologies AC Current Switches - AS1,AS3,ASX series


If you control or monitor electric powered loads, you need current switches. Monitor fans, pumps, lights, and heaters for proper operation. Current switches give positive feedback that the load is operating and are much easier to install than alternatives like pressure switches, optical sensors, or zero speed switches.

AS and ASX current switches combine a current sensor, signal conditioner, and limit alarm in a single package. AS1 series are well suited to automation systems of all kinds with their universal solid-state outputs and a wide frequency response. AS3 series have a high current output that works well with relay logic control schemes. ASX series combine the AS3 design with a built in adjustable time delay. All ...

Search NK Technologies AC Current Switches - AS1,AS3,ASX series - 42 Items


NK Technologies Compact AC Current Switches - AS1 series


The AS1 Series Compact Case Current Sensing Switches are a compact, inexpensive, easy-to-use ring which slips onto a conductor to give a solid-state contact for indication of current flow. Ideal for use in control panels, or wherever confirmation of current flow is desired, AS1 Series-CC current sensing switches are a cost-effective way to detect live conductors and see current flow to fans, heaters, pumps, lighting or other AC powered devices.
• Fixed 0.5A trip point
• Long life solid-state output
• No external power required
• Normally open or normally closed output
• 5 year warranty


NK Technologies Easy Setup AC Current Switches - ASL series


The ASL Series Current Sensing Switches provide a current operated solid-state contact powered from the monitored circuit. 
• Trip point can be set before installation or with no load present
• Trip point indicated on potentiometer label
• Self-powered
• 2 second inrush delay
• 5 year warranty


NK Technologies Easy Setup AC Current Switches - ASD series


The ASD series sensors provide a limit alarm contact with the easiest adjustment method ever designed. 
• Digital display of trip point
• Top access trip adjustment
• Long life solid-state output
• AC or DC powered
• Solid core
• 5 year warranty


NK Technologies Large AC Current Sensing Switches - ASXP-MS & ASXP-LS series


The NK Technologies ASXP-MS and ASXP-LS Series Current Switches combine a current transformer and signal conditioner into a single package. The large, easy-to-install, split-core design allows for installation over existing conductors without the need to disconnect the load, even in applications where there are multiple conductors per phase.  
ASXP-MS series:   The switch output is powered from the primary circuit
ASXP-LS  series:   The switch output is externally powered
• Sense currents to 1600 A
• Split-core for easy installation
• SPDT relay output
• Adjustable setpoint & delay
• Status LED
• DIN rail or ...