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Neilsen Kuljian

For over two decades, NK Technologies has remained the premier manufacturer of Current Sensors and Transducers serving the factory and industrial automation markets.

With one of the broadest product portfolios in the industry, NK Technologies provides reliable, innovative current sensing products designed to add value and exceed our customers' expectations.

NK Technologies ATR Series Current Transducers Distributors

Current Transducers

Current Transducers are designed to provide an analog current reading for monitoring, data logging and panel meter applications, these current transducers offer a choice of 0-5VDC, 0-10VDC or 4-20mA average responding or True RMS outputs. Self-powered and split-core options make these a cost-effective choice as a PLC input in motor status applications or where VFDs are involved.

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

NK Technologies AS1 Series Current Operated Switches Distributor

Current Switches

Neilsen Kuljian current operated switches are ideal for off/on status, overload or underload indication. Current sensing switches from NK Technologies combine a CT, signal conditioner and output contacts into a single package for use with industrial and factory automation equipment.

  • Multiple output ranges
  • Adjustable or fixed setpoints
  • Models with integral time delay available
  • Choice of N.O or N.C., AC or DC contacts
  • Self-powered and split-core options

NK Technologies AG Series Ground Fault Sensors Distributors

Ground Fault Sensors

Detecting ground fault conditions and protecting sensitive equipment or personnel from harm are where AG Series sensors can help.

A compact design eliminates two-piece solutions while options include factory-set or field adjustable trip point; N.O. or N.C. latching or auto-reset relays, 24/120/240V power supply and noise immunity.

N.O./N.C. solid-state switch or mechanical relay outputs & field-selectable 5 mA, 10 mA or 30 mA setpoints. Noise immunity option for EMI/RFI sensitive environments & UL, CE approved.

NK Technologies APN Series Power Monitoring Measurement Transducers Distributor

Power Sensing Products

Our power monitoring sensors measure loads and improve performance by providing instantaneous True Power kW or accumulated kWh data.

They are simple, reliable and accurate.

Digital communications are available in some models. Contact the factory or a local distributor for more information. 4-20 mA, 0-10 VDC, and/or networked outputs & accepts standard 5 A or 0-333 mV CT inputs.

NK Technologies VTR Series True RMS Voltage Transducers Distributors

Voltage Transducers

NK Technologies' voltage transducers are high-performance transducer for sensing voltage in installations.

They are available in an AC or DC Series and come in a variety of nominal voltages.

4-20 mA powered industry standard output makes use with existing controllers, data loggers and SCADA equipment easy and reliable.

Space saving 35 mm wide compact DIN rail case mounts quickly for an attractive installation. Input and output circuitry electrically isolated for improved safety of use.

NK Technologies CT-MS & CT-LS Series 1 A & 5 A Secondary Current Transformer Distributor

Current Transformers

NK Technologies (Neilsen Kuljian) offer current transformers (CTs) for use with power transducers, panel meters, and in two-piece installations with transducers and switches to extend ranges for high amperage/large conductor applications.

Split-core or solid-core case current transformers & agency approved.

5 A or 0-333 mV secondary outputs & 5 A secondary ratios available from 50 A to 3000 A and higher on NK Technologies current transformers.

A current transformer (CT) should never be energized (AC current through the sensing window) without a load connected to the output terminals. Best practice is to terminate the current transformer secondary on a terminal block with the ability to short between two points before extending the leads to the load. If it is ever necessary to remove the load from the CT while it is or could become energized, a shorting bar can be placed between the secondary loads, as shown in the drawing to the right.

NK Technologies ADC Series Analog to Digital Signal Converters Distributors

Signal Converters

NK Technologies' ADC series signal converters use sensor outputs (4-20 mA, 0-5 and 0-10 VDC) and convert these to digital RS485 outputs.

DIN rail mounting makes installation a snap & industry standard outputs.

The CTC series accept either 5 A secondary current from current transformers or 0.333 VAC secondary voltage from our ProteCT series sensors and convert them to 4-20 mA loop-powered output for use with PLCs, panel meters or data loggers.

NK Technologies AMPFlasher ACI Series AC Current Indicators Distributor

AC Current Indicators

The AMPFlasher ACI Series Current Indicator is a compact, inexpensive, easy-to-use LED ring which slips onto a conductor to give a flashing indication of current flow.

5/16" ID suitable for conductors up to 100 A & low sensitivity turn-on point detects current as low as 0.5 A with a single conductor pass.

High visibility flashing LED gives visual status & compact 1" case with cable tie for secure mounting.

The AMPFlasher is ideal for use in control panels, or wherever confirmation of current flow is desired.

The AMPFlasher current indicators are a cost-effective way to detect live conductors and see current flow to fans, heaters, pumps, lighting or other powered devices.

NK Technologies PBR Series PowerBASE Relays Wireless Transceivers Distributors


PBR PowerBASE Series are industrial-grade relays in a specially designed package.

DIN Rail Kits provide a convenient method to facilitate the mounting of the AGL, VTR, APT, and APMR Series of NK Technologies' sensors.

Sensicast Wireless Transceivers offer a cost-effective way to connect sensors or KW meters where output wiring is a challenge.

NK Technologies' Parent Company was a System Integrator. Neilsen Kuljian began automating industrial sites in Silicon Valley in 1982. An early NK Technologies project required close control of AC motors and electric resistance heaters. A thorough search found that there were no products available that could accurately monitor these loads. So NK Technologies engineers developed a unique self-contained current operated switch. Word of this NK Technologies Current Switches invention quickly spread throughout the control engineering community. Orders began coming in from System Integrators and NK Technology distributors across the country and around the world.

In 1986 the Board of Directors decided that Neilsen Kuljian should focus on developing innovative, current sensors and power monitoring products. This decision led to tremendous growth, which, in turn, led to a flood of new products Current Transformers, Current Switches, Current Transducers, Ground Fault Sensors, Power Monitors, Voltage Transformers, and Voltage Transducers. In the late 1990's, the NK Technologies division was formed to meet the overwhelming demand for new products and services from Industrial Integrators, distributors and End users. A network of Neilsen Kuljian Manufactures Representatives and Authorized NK Technologies distributor brings technical expertise and quick product delivery around the world.

Neilsen Kuljian ATR transducers use a mathematical algorithm called "True RMS," which integrates the actual waveform over time. Select Neilsen Kuljian ATR transducers for nonlinear loads or in "noisy" power environments. ATR transducers from NK Technologies combine a current transformer and a True RMS signal conditioner into a single package. NK ATR Current Transducers are available in a solid or split core case. AT Current Transducers from NK Technologies combine a current transformer and signal conditioner into a single package. The AT Series NK Current Transducer has jumper selected current input ranges and industry standard 4 to 20mA, 0 to 5VDC or 0 to 10VDC outputs. AT/ATR 3 and 4 transducers from NK Technologies combine a high capacity current transformer and a signal conditioner into a single package. The ATR version of NK Technology Current Transducer is True RMS for use on distorted waveforms found in VFD or SCR outputs. DT Current Transducers from NK Technologies combine a Hall effect sensor and signal conditioner into a single package. The DT Series Current Transducer has jumper selectable current input ranges and industry standard 0-20mA, 4-20mA, 0-3VDC, 0-5VDC or 0-10VDC outputs.

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 voltage transducer for your application in the USA, Canada & Mexico. Whether we have power sensing products in stock in Boise, Idaho or need to ship direct from NK Technologies to any USA cities; Clearwater Tech can get current transformer to you fast and save you money! It will be very helpful if you have the ground fault sensor part numbers ready, then our sales representatives can provide you with a pricing and availability quote for PBR power base relay that you are looking for in seconds. If you do not have the part numbers for DIN-rail kits, 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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Sola Power Conditioners

The MCR Series provides excellent noise filtering and surge protection to safeguard connected equipment against damage, degradation or malfunction. This protection, combined with the excellent voltage regulation inherent to the ferroresonant design, can significantly increase the mean time between failures (MTBF) of protected equipment. MCR portable units are the perfect choice where use of an existing outlet is preferred over hardwiring.

SSAC Monitor

The WVM Series provides protection against premature equipment (motor) failure caused by voltage faults on the 3 Phase Line. The WVM's microcontroller design provides reliable protection even if regenerated voltages are present. It combines dependable fault sensing with a 10 fault memory and a 6 LED status display. Part instrument, part control, the WVM protects your equipment when you are not there.