The Q2000 is a research-grade DSC with superior performance in baseline flatness, precision, sensitivity, and resolution. Advanced Tzero ® technology and multiple exclusive hardware and software features make the Q2000 powerful, flexible, and easy-to-use. Modulated DSC ® and a reliable 50-position autosampler are available as options. An additional high-value feature is Platinum™ software, which permits automatic scheduling of tests designed to keep the Q2000 consistently in top operating condition. Available accessories, such as a new photocalorimeter, pressure DSC, and the widest array of cooling devices, make the Q2000 a DSC well-equipped to satisfy the most demanding researcher.

Performance

Temperature Range Ambient to 725°C

With Cooling Accessories -180 to 725°C

Temperature Accuracy +/- 0.1°C

Temperature Precision +/- 0.01°C

Calorimetric Reproducibility (indium metal) +/- 0.05%

Calorimetric Precision (indium metal) +/- 0.05%

Dynamic Measurement Range >+/- 500 mW

Baseline Curvature (Tzero; -50 to 300˚C) 10 µW

Baseline Reproducibility with Tzero +/- 10 µW

Sensitivity 0.2 µW

Indium Height/Width 60 mW/°C

The RCS90 employs a two-stage refrigeration system, which permits convenient DSC/MDSC operation over the temperature range from -90 to 550°C. Typical RCS90 controlled cooling rates are detailed in the table below. Ballistic cooling from 500°C to ambient is achieved in about 7 minutes. The RCS90 is compatible with all ambient pressure Q Series™ DSC Systems. RCS40 The RCS40 employs a single-stage refrigeration system, which permits convenient DSC and MDSC ® operation over the temperature range from -40°C to 400°C. Typical RCS40 controlled cooling rates are detailed in the table below. Ballistic cooling from 400°C to ambient is achieved in about 7 minutes. The RCS40 is compatible with all ambient pressure Q Series™ DSC Systems. RCS90 Controlled Cooling Rates, from 550°C (upper limit)*

Controlled Rate To Lower Temperature

100°C/min 300°C

50°C/min 120°C

20°C/min -20°C

10°C/min -50°C

5°C/min -75°C

2°C/min -90°C

DSC provides rapid and precise determinations of transition temperatures using minimum amounts of a sample. Common temperature measurements include the following:

• Melting • Crystallization • Glass Transition • Polymorphic Transition • Thermal Stability • Liquid Crystal • Oxidation Onset • Protein Denaturation • Cure Onset • Solid-Solid Transition

This composite shows typical shapes for the main transitions observed in DSC.

Heat Flow is the universal detector, as all physical and chemical processes involve the exchange of heat. As such, the DSC Heat Flow signal is commonly used to measure and quantify a wide variety of transitions and events, often occurring in the same material as a function of temperature.

This example shows a pharmaceutical material which is undergoing a variety of physical changes as it is heated from subambient through its melting temperature. DSC is sensitive to all of these events.