| 1991 |
- Foundation of Innovative Sensor Technology IST AG in Wattwil, Switzerland
- Entry into the sensor market through the production and sales of nickel temperature sensors
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| 1993 |
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| 1994 |
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| 1995 |
- Beginning of Sales in Las Vegas, USA through an exclusive representation
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| 1999 |
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| 2004 |
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| 2005 |
- Acquisition of IST AG by the Endress + Hauser Group
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| 2006 |
- Foundation of a 100 percent subsidiary in Las Vegas, USA
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| 2012 |
- Moving of IST AG headquarters from Wattwil into the custom-built premises in Ebnat-Kappel, Switzerland
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| 2015 |
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| 2019 |
- IST AG moves into its extended headquarters
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