About us

ChenYang means RISING SUN in Chinese. ChenYang Technologies (HK) Co., Limited was founded on solid technical fundamentals in Sensors, Measurement Technology and Magnetics in 2013. It bases on Hong Kong, takes a broad view at the whole world, and sells its products world wide.

The main products include Hall Effect switching ICs, linear Hall elements, current and voltage sensors, Hall gear tooth sensors, Hall Vane sensors, Hall proximity switches, magnetoresistive speed sensors, Gaussmeters, fluxmeters, magnetic pole detectors and various kinds of permanent magnetic products etc.

ChenYang stands for unceasing technology innovation to improve the quality of its products for fulfilling customers’ high requirements and offers customers first-class services.

Our development work focuses on electromagnetic measurement technology and sensor systems, including Hall sensors, measurement of weak magnetic fields and current, speed and position measurement, precision measurement technology, and applications of permanent magnetic materials.

Our Vision

To become one of the leading suppliers of Hall-effect sensors (Hall ICs, current, voltage, speed, and position sensors), measuring instruments, and magnetic products in Germany and across Europe.

Mission Statement

We strive to exceed our customers’ expectations in quality, delivery, and cost through continuous improvement and close customer interaction.

Company information

Headquarters: Hong Kong
Registering Court : Hong Kong District Court
Business register number: 61172680

September 2025

Dr.-Ing. habil. Jigou Liu and Mrs Jinsong Chen founded “SONNECY Sensor Technologies (Shanghai) Co., Limited” in Shanghai to manufacture sensors and measuring instruments developed by ChenYang Technologies GmbH & Co. KG and to reduce production costs by leveraging China’s highly developed industrial supply chain.

March 2019

Launch of the CYGM99A Gaussmeter for precise DC and AC magnetic field measurements, featuring a display and data communication.

February 2019

Launch of the CYHCTD-S3 and CYHCSD-S3 digital Hall-effect current sensors for DC/AC current measurement, system monitoring, and RS-485 Modbus communication.

September 2018

Launch of split-core AC current transformers for AC current measurement and system monitoring and control.

June 2018

ISO 9001:2015 certification by TÜV SÜD for the development, manufacturing, and distribution of products in the fields of sensor technology, measurement technology, and magnetics.

August 2015

ISO 9001:2008 certification by TÜV SÜD for the development, manufacturing, and distribution of sensors, measurement technology, and magnetic products.

November 2014

Registration of the “SONNECY” trademark in the EU and China for all ChenYang products.

February 2014

Production of Precision Open-Loop Hall-Effect Current Sensors

December 2013

Cooperation with SONNECY Technologies (Shanghai) Co., Ltd. in Shanghai.

October 2013

Production of Hall probes for magnetic field measurement.

March 2013

Registration with ChenYang Technologies (HK) Co., Limited in Hong Kong.

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