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SHANGHAI CHENZHU INSTRUMENT CO., LTD. is a very established provider that specialises in automation safety.
We have over 24 years of experience in the design and manufacture of intrinsic barrier, surge protection device, isolated signal conditioner, safety relay, low power transmitter and temperature transmitter. Our products and solutions cover many areas--from process automation safety to factory automation.
CHENZHU has got intergraded management service Certificates, like ISO9001, ISO14001 and ISO45001, more than 135 patents related core tech was obtained, reference OEM and ODM customers from German, Japan and direct shipments to any global destinations.

Thor is all about protecting against the damaging effects of power transients. It is our goal and mission to connect our customer challenges with high-quality, right-priced solutions and products – completed by unrivaled customer service and technical support.
Incorporated in 2006, Thor Electric Co., Ltd has built everything to offer a wide range of innovative and reliable surge protection solutions and products.
Thor is following the international quality system standards, is ISO 9001 certified and our technical standards are in line with GB18802.1-2011/IEC61643.1.
All types and classes of our lightning and surge arresters 20KA~200KA(8/20μS) and 15KA~50KA(10/350μS) are tested and pass all the requirements based on their class.
Thor has been designing new products to meet the RoHS directive since 2006. Thor’s ongoing commitment to RoHS compliance includes continuing efforts to reduce the presence of hazardous substances in the design and manufacture of a growing number of popular products.
Zhejiang Thor Electric Co., Ltd is committed to meeting the requirements of the European Union’s Waste Electrical and Electronic Equipment (WEEE) directive. This directive requires producers of electrical and electronic equipment to finance the take-back for re-use or recycling of their products placed on the EU market after 2005.

What we offerUnder the company's own brand COBA the Baeck GmbH & Co. KG, which was founded in 1950, operates as importer and exporter of mechanical, electrical and electronic products.
The Baeck GmbH & Co. KG exports European technology to countries outside Europe.
Because of the location and our experience the focus is on German technology.
For the Central European market electrotechnical products are mainly imported from the Far East. In this activity we have many years of experience.