From its humble beginnings 125 years ago, Intermatic has remained on the cutting edge of innovation.

It is deeply rooted in the tradition of a family-owned business, following a distinct formula of honest, customer-first business that has helped it become a global leader in energy management solutions.

After over 100 year of incorporation, Intermatic is continually investing in state-of-the-art technology to improve the value of its products and its service to the customers.

  • 1891 - 1917
  • 1918 - 1940
  • 1941 - 1956
  • 1958 - 1988
  • 1989 - 2000
  • 2000 - Present

1891 – October 15, 1891 the company was incorporated as Pratt & Englund Company in Chicago, Illinois as a manufacturer of portable streetcar fare registers

1903 – Company name is changed to the International Register Company (IRC) with the purchase of the New Haven Car Register Company

1904 – Became leading fare register manufacturer in the United States

1917 – Company president Arthur Woodward invents wind vine sight for machine guns for combat in World War I

1930 – Began manufacturing Coin Meters. This was the company’s introduction to clock-actuated devices, which was the precursor to the world-renown world class timers.

1941 – Began manufacturing 20 mm shells, producing over 20 million during the course of the World War II, along with aircraft controls and other munitions items.

1945 – The first time switch the “Inter-Matic is introduced and rapidly accepted due to the high quality and low price. The “Inter-Matic” time switch was used to control electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners.

1952 – Brought its first consumer timer product, the Time-All, which controlled various household lights and devices. The Time-All is still manufactured today

1956 – Introduced the world-renowned T101 mechanical time switch that still remains a vital component in the mechanical time switch industry.

1958 -- Introduced Pool and Spa Controls line to the industrial market. The Pool and Spa Control line remains a valuable product line today.

1961 -- The Spring Grove office opens. This is the current location of Intermatic's corporate headquarters.

1969 -- Company reaches $15 million in sales.

1972 -- International Registry Company is officially renamed Intermatic Incorporated.

1989 – Intermatic opens a new distribution center in Richmond, Illinois

1990 – The company reaches almost $100 million in sales, and acquires two new lines, industrial surge, and professional landscape lighting products.

2007: Intermatic acquires Grasslin acquired Controls Corp (GC), a world-class manufacturer of timer switches and control units, from General Electric Co.

2011: Intermatic launches a new line of energy saving web-based controls with the ET90000 Series. Intermatic also begins offering a wider variety of energy saving products including Occupancy/Vacancy Sensors, and LED lighting.

2016: Celebrating 125 Years In Business

New Product Highlights


The Intermatic® line of occupancy sensors are engineered and tested for long-lasting performance. In-Wall and Ceiling Mount sensors in both PIR (infrared) and dual (PIR/ultrasonic) technologies can monitor virtually any area within a building, providing solutions for any retrofit or new construction project. They utilize zero-crossing technology to suppress inrush current impact, supplying reliable ON/OFF sensing no matter the lighting technology.


The Intermatic® ICUBE™ Adaptive Defrost Module cuts defrost cycles--and utility bills--for the food service industry. Designed by Grässlin by Intermatic for commercial walk-in coolers and freezers, the smart-sensing technology behind the ICUBE™ continuously monitors evaporator coil temperatures and only allows defrosting when necessary at the next programmed timer interval.

Surge Protective Device Group Shot

The Intermatic® Surge Protective Device with Consumable Modules covers 100% of a home’s big investment equipment, from appliances and computers, to HVAC equipment and TVs. The Surge Protective Device uses replaceable Consumable Modules that allows homeowners to easily and safely replace a module when the built-in LED light indicates it has been compromised.