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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

PDSC (Pressure Differential Scanning Calorimeter)

PDSC (Pressure Differential Scanning Calorimeter) Product ShotPressure DSC is differential scanning calorimetry under either high or low-pressure conditions. Raw materials and finished products are often processed or intended for use at conditions other than ambient temperature and pressure. Conventional calorimetry characterizes well the physical and chemical properties of materials. Now, pressure DSC extends characterization of materials to extreme pressures. A calorimeter measures phase changes, reactions or processes that absorb or release heat. A pressure DSC measures the effects of pressure on these measurements. DSC results are often different for samples analyzed in open versus hermetically sealed pans due to changes in pressure inside sealed pans. Pressure DSC controls pressure to study and understand the reason for those differences. Materials processed at conditions other than ambient temperature or products designed for extreme end use conditions can be better characterized at operating conditions using a controlled pressure DSC. The heart of the pressure DSC is a heat flux plate designed for to measure small energy changes with reliability versus not just versus temperature but also versus pressure.

Materials to Study with the DSC-P Thermal Analyzer

  • Pressure Differential Scanning Calorimeter (PDSC) Product PhotoCatalysts
  • Chemicals
  • Coals and other fuels
  • Cosmetics
  • Explosives
  • Foods
  • Nuclear Research
  • Petrochemicals
  • Pharmaceuticals
  • Phenolics
  • Propellants
  • Rubbers
  • Thermoplastics
  • Thermosets
  • Waxes

Uses for Pressure DSC Thermal Analyzer

  • Accelerated Aging
  • Crystallization temperature
  • Curing and cross-linking reactions vs. pressure
  • Effect of additives or processing conditions
  • Elastomer vulcanization
  • Heats of reaction
  • Hydrogenation and carbonization reactions
  • Increased Oxidation rate under high oxygen pressure
  • Measurements under process conditions, lyophilization for example
  • Melting / Boiling points
  • Oxidation Induction Time
  • Oxidative stability of oils, lubricants, fats, foods or plastics
  • Pharmaceutical Hydrates/Solvates - vaporization versus pressure
  • Physical processes / chemical reactions influenced by pressure
  • Pressure dependent chemical reactions
  • Pressure effect on polymorphic transitions, recycled material, glass transition
  • Pressure induced phase transitions
  • Reaction rates and temperatures
  • Simulate process and operating conditions
  • Stabilizer effectivenessSuppression of volatiles vaporization
  • Thermal stability
  • Vapor pressure measurements

 

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