J&D is a leading manufacturer of top-quality transducers specializing in voltage and current sensors.

We provide innovative technology solutions for various industries, including smart grid, renewable energy, and e-mobility.

Wide range of applications

Our high precision split core current transformers, split core DC current transducers, and flexible Rogowski coils offer accurate measurements for a wide range of applications. We offer a variety of current sensors with different sizes and ratings, catering to our customers' needs.

J&D's quality and reliability

Our advanced technology supports energy measurement, monitoring, protection, and more. We are committed to providing seamless worldwide service and support, delivering cutting-edge magnetic solutions that add value to your business. Contact us today to learn how we can meet your voltage and current sensor requirements with J&D's quality and reliability.


J&D specializes in providing high-quality solutions for measuring electrical parameters. We maintain strict standards, such as ISO 9001, ISO 14001, and ISO 45001 certifications,to ensure that our products meet the highest quality and environmental responsibility standards.

Innovative solutions

Our advanced voltage and current sensors cater to various applications. We are committed to helping clients save time and resources with innovative solutions. Building lasting relationships, exceeding expectations, and delivering unmatched value are our priorities. As a market leader, we support clients throughout the process. Our state-of-the-art solutions help customers achieve their goals, save resources, and provide exceptional value to their customers.


J&D our core, we have a highly skilled and dedicated team of design engineers, production technicians, and sales professionals who are passionate about driving the power quality and technical revolution forward. With a shared objective of delivering reliable, accurate products that meet our customers' requirements, we work collaboratively and enthusiastically to ensure that our solutions exceed expectations. We are committed to staying ahead of the curve, continually pushing the boundaries of what is possible and providing the best possible service to our customers.

Contact J&D

#1115, Joongang Tower,
Wiryegwangjang-ro 300,
Sujeong-gu, 13640 Seongnam,
Gyoenggi-do, South Korea
Tel: +82-31-577-2280
Support: sos@hqsensing.com

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Trade Shows

J&D attends trade shows throughout the year. Check out our calendar of events to find out where we’ll be next. Listings will be updated as new trade shows and events are added. In the meantime, check out our new webinar series above.


Contact J&D

- Innovation
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