Home Companies Contact imprint Sitemap [german] english Certifications Certifications Immersion sleeves Stainless steel sleeves Brass sleeves Sensor sleeves equipment Coupling spring Retaining clip Tension band Fixing screws Cable gland inquiry Immersion sleeves Sensor sleeves ISO certificate ISO certificate Int. Info brochure quality The assurance and consistent further development of quality standards is an integral part of the company's principles. Ziegler thus fulfills the growing requirements of international standards. The company has been certified according to DIN EN ISO 9001 since 1998. environment Ziegler uses the latest technologies and the most modern processes to protect the environment. Responsible use of materials in the manufacturing process has top priority. Ziegler works according to the environmental management system DIN EN 14001 and is a member of the Hessen Environmental Alliance. Downloads Certificate DIN EN ISO 9001 and DIN EN ISO 14001 (452 kB) International certificate DIN EN ISO 9001 and DIN EN ISO 14001 (77 kB)