Reliable technology combined with the greatest ease of use: These are the key drivers for the development and manufacturing of leading products in the areas of time switching, light and temperature control as well as energy and hour meters.

At Grässlin, we are focused on the professional needs of electricians. Our highest priority is the development of solutions which make their work easier and more efficient. This is why we do not indulge in oversized concepts and technical gimmicks, but rather offer technologically sophisticated products that are easy to install, reliable and able to realize modern functionalities in building automation to our customers - following our motto "Great performance. Easy handling."

To deliver on these promises in the future, we work today on the technological challenges of tomorrow and sustainably drive innovation and the quality of the Grässlin brand. Based on our achievements to date, we have set ambitious goals that ensure our position as a driving force in the industry and as the first choice for ambitious electricians in the future.



GRÄSSLIN – The brand for ambitious electricians.

Pioneering spirit, flexibility and customer focus have transformed a family-run business of four persons to a global brand for professional applications in building automation. Numerous product innovations and a global reputation as an expert for time switch technology establish Grässlin as the market leader.



Member of the Intermatic Group

Since 2007, Grässlin has been a member of the Intermatic Group, a leading manufacturer of energy control systems with its headquarters in Spring Grove, Illinois, USA. Intermatic employs approx. 750 staff at six international locations.

Owing to its globally unique competency in the field of time switches as well as light and temperature control, Grässlin makes a crucial contribution to Intermatic as a global specialist in the area of energy management solutions.

Both companies look back on a long tradition and continually invest in innovative and sustainable technologies for the purpose of improving their products and service for their customers.

Grässlin History Timeline

Founded in 1956 as family enterprise in the heart of the Black Forest, today Grässlin counts among the leading international companies for time switch technology, light and temperature control as well as tariff time switches.

  • Company foundation in St. Georgen Schwarzwald by Dieter Grässlin – Vision: Part-assembly of clockworks

  • The first own product – an hour counter

  • The first time switches

  • First DIN-rail products

  • New factory building in St. Georgen

  • Startup of a second production site in St. Antoni / Switzerland

  • Death Dieter Grässlin

  • Introduction of Quartz technology

  • Foundation of subsidiaries in the USA (New Jersey) and France (Neuilly sur Marne) and Joint Venture in Taiwan

  • Start own production of synchronous motors and stepping motors

  • Extension of production with another manufacturing site in Peterzell

  • ISO 9001 Quality Management Certification

  • Sale of parts of the business – precision engineering, plastics and automation

  • Grässlin is bought by General Electric

  • Introduction of an easy, menu-led programming philosophy for digital devices

  • Introduction of radio technology for room thermostats

  • Grässlin becomes part of the Intermatic Group

  • Introduction of LAN and Power Technology

  • Introduction of talento pro Serie

  • Introduction of the new product line of movement and presence detectors:

  • Relaunch of the successful talento TOP as talento TOP pro

  • Innovation talento smart in designs B15, B25, C15, C25, S25

  • Launch of the new temperature control portfolio

Product Portfolio - Products for a better life.

At Grässlin, our aim is to make life in residential, office, commercial and industrial buildings safer and more comfortable while assisting in saving energy efficiently. We offer reliable, powerful and user-friendly time switches, products for light and temperature control as well as energy and hour meters.

Outstanding products

Grässlin products stand for reliable quality, highest precision and total ease of use. The product range includes analogue and digital time switches delivered with versatile programs and extensive standard functionality as well as products combining regular time switch functions with sensors. These include, among others, motion sensors, presence sensors and twilight switches. The range is complemented by time switch modules, meters and products to control heating systems.

Impressive benefits

The combination of sophisticated technology and ease of use enables the simple controlling of complex applications and achieve the highest possible energy efficiency at the same time. Individual programming options and numerous valuable functions ensure that even the most ambitious individual needs can be met.

Time Switches

Time Switch Technology


Intelligent time switch technology by Grässlin makes life in residential, office, commercial and industrial buildings easier, safer and assists in saving energy efficiently. This is achieved by innovative products which impress with intuitive interfaces and can be installed with ease.

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Light Control

Light Control


The reliable Grässlin light controls offer the highest degree of functionality, switch the desired situation in residential, office, commercial or industrial buildings, or in the entire outdoor area individually and provide a noticeable increase in security, living comfort and energy efficiency.

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Temperature Control

Temperature Control


Our precise room thermostats and time switches for heating systems offer a variety of options for controlling the temperature in residential, office, commercial and industrial buildings. They assist in raising the comfort level by adjusting the feel-good temperature individually and energy efficiently - whatever the season.

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Energy & Hour Meters


The sealable energy and hour meters from Grässlin count, measure and monitor energy consumption in private households, industry, trades or building services. They promote energy efficiency, conserve resources and thereby save electricity and money.

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