Instrument Specialists Incorporated (ISI) was formed in 1991 with the mission to provide innovative products for Thermal Analysis. With years of experience in the Thermal Analysis field the people at ISI are dedicated to customer service and providing superior quality products. Remember Thermal Analysis is all we do!

Our full range of Thermal Analyzers provide flexibility with a wide range of operating temperatures. Our instruments consists of DSC, PDSC, DTA, TGA, and STA analyzers with temperature ranges from -125C to 1500C. Our advanced Windows software provides easy operation while offering advanced analysis features.

ISI is the only company that can offer advanced upgrade systems for your existing Thermal Analyzer. We have been providing upgrade systems since 1994 for TA Instruments (DuPont), Perkin Elmer, Mettler, Netzsch, Rheometrics (Omnitherm & PL), Setaram and many others. All upgrade systems use the same advanced Windows software as our new analyzers. These systems can transform your existing analysers into a high performance instrument at a fraction of the cost for full replacement. Also we provide full service and support for all existing analyzers.

In addition to new Instruments and Upgrades ISI offers a wide range of quality parts and supplies for existing thermal analysis equipment. From DSC pans to quartz work we provide it all! We pride ourselves with outstanding quality and reasonable prices.

Please call us to experience the personalized service we offer. You will always get a real person at the other end of the line willing to help with your Thermal Analysis needs.

Instrument Specialists, Inc Headquarters in Wisconsin, USA

Gas Selector Accessory

Instrument Specilialists Inc. - Gas Selector Accessory Product Shot
The ISI Gas Selector Accessory (GSA) provides manual or automatic gas selection of purge gases to various thermal analysis instruments. Up to four input gases can be connected to the unit for routing to your analyzer. Under computer control gases are selected during the experiment and switched over at the desired times. The gas selected is indicated by LED on the front panel on the GSA accessory. Flow rate is controlled prior to each input gas connection and optional flow meters and bracket are available. When the desired gas is switched, the selected gas vents to allow any pressure build up to be released prior to switch over. The unit also has a manual mode which selects the desired gas by keys located on the front panel. This makes the GSA a great addition to and thermal analysis system.

Full automatic computer control or manual mode
Supports up to 4 different gases for purging
Special vent feature for smooth flow switch over
Microprocessor controlled
Optional flow meters with mounting bracket