An accelerating rate calorimeter (ARC) analyzes the properties of an exothermic reaction in a confined adiabatic environment, one in which minimal amount of heat is lost. While a completely adiabatic environment is impossible, accelerating rate calorimeters approximate one as much as possible. Because of the adiabatic condition, any heat generated by the material causes the sample to increase in temperature at an accelerating rate as the temperature increase fuels the reaction. Adiabatic calorimeters are used to study runaway reactions and are often used to evaluate the behavior of reactive hazards. Things to consider when purchasing an accelerating rate calorimeter include the temperature range, what other conditions can be tracked, and sample volume.
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| Company | NETZSCH-Gerätebau GmbH | NETZSCH-Gerätebau GmbH | NETZSCH-Gerätebau GmbH |
| Item | Multiple Module Calorimeter MMC 274 Nexus® | Accelerating Rate Calorimeter ARC 244 (ARC®) | Accelerating Rate Calorimeter ARC 254 (ARC®) |
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| Catalog Number | MMC 274 | Accelerating Rate Calorimeter ARC 244 | Accelerating Rate Calorimeter ARC 254 |
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| Description | The MMC 274 Nexus® consists of two parts: the base unit with electronics and the exchangeable calorimeter module. This guarantees maximum flexibility.
Exchangeable calorimeter modules are available for different applications. The Accelerating Rate Calorimeter (ARC®) module can be used The MMC 274 Nexus® consists of two parts: the base unit with electronics and the exchangeable calorimeter module. This guarantees maximum flexibility.
Exchangeable calorimeter modules are available for different applications. The Accelerating Rate Calorimeter (ARC®) module can be used for standard process safety work. External heater and VariPhi® modules can be employed for more sophisticated measurements.
Features - Multiple testing modes in one instrument for wide application coverage
- Scanning mode (constant power, constant heating rate)
- Isothermal mode
- Adiabatic mode with Heat-Wait-Search for process safety tests
- Exchangeable calorimeter modules in one table-top instrument
- ARC module for safety testing
- External sample heater module for scanning tests as with DSC
- VariPhi® module for fire exposure tests, specific heat, endothermal effects
- High Temperature Coin Cell Module for coin cell battery studies
- Wide temperature range up to 500°C
- Wide pressure range up to 100 bar (10 MPa)
- Various sample containers of different materials and volumes
- Proteus® software for the evaluation of onset, peak, area, etc., which may be combined with other thermoanalytical data in one plot
... Read More | The Accelerating Rate Calorimeter 244 (ARC® 244), formerly known as TIAX ARC 3000, is designed to safely measure the amount and rate of heat release associated with the processing or storage of chemicals.
This information is vital in developing and evaluating processes to ensure safe operation The Accelerating Rate Calorimeter 244 (ARC® 244), formerly known as TIAX ARC 3000, is designed to safely measure the amount and rate of heat release associated with the processing or storage of chemicals.
This information is vital in developing and evaluating processes to ensure safe operation and to prevent thermal runaway which can have devastating effects.
The Accelerating Rate Calorimeter 244 (ARC® 244) technology is integral to designing inherently safer batteries as well as measuring energetic materials used in such products as explosives, propellants, and air bags.
Features:- Tube heater reduces heat losses due to reflux
- Windows XP™ operating system standard
- Smaller footprint
- Lift mechanism for calorimeter top
- Experimental wizards for easy test set-up
- Power Compensation Module (optional)
- Increased safety and interlock features
... Read More | The Accelerating Rate Calorimeter 254 (ARC® 254) provides adiabatic calorimetry data in a safe, controlled laboratory environment. This information helps provide a sound understanding of the fundamental physical processes involved. From this understanding, various safe operating systems and The Accelerating Rate Calorimeter 254 (ARC® 254) provides adiabatic calorimetry data in a safe, controlled laboratory environment. This information helps provide a sound understanding of the fundamental physical processes involved. From this understanding, various safe operating systems and procedures can be developed to mitigate the hazards posed by a reactive system.
The Accelerating Rate Calorimeter 254 (ARC® 254) simultaneously measures temperature and pressure. The sealed pressure system also allows the user to evaluate the effects of different gas atmospheres on the thermal stability of the system.
Gaseous reaction products may be analyzed at the end of an experiment to help identify and understand the reaction mechanisms involved.
The Accelerating Rate Calorimeter 254 (ARC® 254) is designed to model the course of a large-scale reaction on a small scale. A test material is externally heated at a fixed volume until exothermic activity is detected. Keeping that sample in an adiabatic environment where no energy is lost, the calorimeter then measures and records the sample temperature and pressure.
Features: - More reliable data and a wider range of application due to the fastest tracking rate up to 200 K/min
- Patented VariPhi® technology can realize low phi test even with a small and safe sample size. Effective detection of both exothermic and endothermic transitions and sample Cp can be achieved by the versatile operating modes on ARC® 254
- Controlled by the powerful Proteus® software, which can be used to operate all other NETZSCH thermal analysis instruments in the lab.
A single experiment provides data for use in the following: - Thermal Hazard Evaluation
- Pressure Hazard Evaluation
- Thermokinetic Analysis
User safety is a key objective in the design of model 254. The user is protected by a series of safety systems that are completely independent of the control system. These safety systems work to protect the user in the event that the primary control system fails. Fully computer-controlled and highly automated, the Accelerating Rate Calorimeter (ARC® 254) features a graphical interface that is easy to learn and use.
The system is totally integrated into clean, modern designs in which all routinely-used equipment is easily accessible.
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| Temperature Range | 25 °C to 500 °C | RT to 500 °C | RT to 500 °C |
| Sample Volume | 0.1 ml to 2.5 ml (Sample Container Volume) | 0.5 to 7 ml | 0.5 to 8.5 ml |
| Pressure Range | 0 to 100 bar | Inquire | 0 to 200 bar |
| Tracking Rate | up to 250 K/min (Fast Module) | Inquire | Up to 200 K/min (at adiabatic operation) |
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