AC Current Transducer monitors loads up to 800 A.

Press Release Summary:

Combining current sensing element and signal conditioner in one package, loop-powered AT/ATR-MS Series features split-core design that allows for installation over existing conductors without disconnecting load even in applications with multiple conductors per phase. Transducer produces 4–20 mA output signal proportional to AC current, and factory calibration eliminates zero and span potentiometer adjustment. Design meets UL, CUL, and CE approvals.

Original Press Release:

New Easy-to-Install AT/ATR-MS Series Current Transducer from NK Technologies Accurately Monitors Loads Up to 800 Amps

SAN JOSE, CA – NK Technologies introduces the AT/ATR-MS Series AC Current Transducer, combining a current sensing element 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 with multiple conductors per phase. Whether installing over exisiting conductors or in a new control system, installation is very simple and quick.

AT/ATR-MS Series AC Current Transducer features include:

• Industry Standard Output: 4-20 mA signal proporational to the AC current, compatible with most automation systems

• Loop Powered: Use the “live zero” output to verify proper connections where the sensor output is 4 mA with no current through the sensing ring

• Split-core Case: Sensing window provides ample space for bus bar, single or multiple conductors

• Factory Calibrated: Eliminates zeo and span potentiometer adjustment

• Meets UL, CUL and CE Approval

The MS Series is ideal for applications such as: monitoring large machines (measures current use to detect over/under current conditions before breakdowns occur); water delivery and treatment (detects open discharge lines and locates clogged filters and blocked intake to pumps); and grinding/shredding (allow for brief periods of drive overload when the processed product varies in density – if the blades hit something foreign the control will alarm or shut down the process.)


Founded in 1982, NK Technologies designed the first low-cost solid-state current sensing technology that underlies the industry today.

Today, NK Technologies  is a leading provider of current sensing, ground fault detection and power monitoring products to the industrial and factory automation markets, with a product portfolio that includes more than 1300 models to satisfy a wide range of specific application needs.  As the needs of these markets change, NK Technologies is well-positioned to respond with sophisticated new product designs and improved product functionality necessary to meet those applications.

NK Technologies, 3511 Charter Park Drive, San Jose, CA 95136; 800.959.4014; fax: 408.871.7515

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