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Accelerating Rate Calorimeter

The Enhanced System Accelerating Rate Calorimeter

Devised by Dow Chemical Company in the 1970's, an explosion at a Dow UK site led to commercialisation of ARC technology. The Chemical Processing Industry has been safer from its first availability in 1980! The ARC has specific features and advantages that make it unique and preferable to all other technologies that were available at this time - and today over 40 years later this technology is still the number one choice for most people focusing in the area of quantifying exothermic reactions, effect of heat upon materials and simulating runaway reactions.

THT has played the major role in ARC technology development and has continuously kept ARC technology in manufacture. THT has produced up-to-date instruments and has extended and enhanced the technology as requested, by users. THT has worked with users worldwide to understand their needs and to develop new products and applications.

Overview
Specification
Options
Spares
Test Services

Key Aspects of the ARC:

Excellent adiabatic control
Universal sample type
Ultimate sensitivity
Ease of use
Simplified data analysis
Worldwide data acceptance
Safe in use

Plus:

Additional larger calorimeters
Options for battery applications

And Latest Features:

Greater stability
Higher sensitivity
Wider temperature range
More versatile additional isothermal modes
Remote operation worldwide
Virtual technician
Endotherms/Exotherms
Zero reflux
Gas flow
Low Phi containers
Fast tracking calorimeter
Pressure compensation calorimeter
Correction to phi = 1
Heat capacity measurement
Automatic data conversion to... Joules, Watts, moles/g

Revision Date: 18/05/2022

Specification

Design
Fully compliant to ASTM E1981 (all revisions)
Calorimeter design to Dow Patent No 4439048 of 1980 and 1984
9cm diameter; 10cm depth calorimeter
2.5cm thick copper, 8 heaters, 6 measuring, control and safety thermocouples
Thermocouple resolution 0.001°C, Precision <0.2%, Accuracy 0.7%
Adiabatic Control to 0.01°C

Temperature range
Ambient to 550°C temperature range (-40°C with Cryogenic System Unit CSU option)
Tracking Rate to 20°C/min
Fast Tracking Option (FTO) upto 400°C/min

Sensitivity (applicable to new calorimeters only)
0.02°C/min
Potential to achieve 0.002°C/min to 200°C
0.01°C/min to 500°C

Pressure
Pressure Range 0-200 bar (or specify range to 700 bar with alternative transducers), Resolution 0.005bar, Precision 0.02%, Accuracy 0.05%

Safety
0.25 cubic meter containment vessel (Blast Box);
3mm reinforced Steel, Proximity Switch, Door interlock;
Automated Fume Extraction facility

Control Modes
Adiabatic; Ramping, Isothermal modes, True Isothermal, Isoperibolic, Step Isothermal.

Sample Holders
Hastelloy, titanium, stainless steel, aluminium, glass, ARC bombs (9cm³), low phi bombs (65cm³) tube bombs (1cm³) special open or closed holders for any battery type.

Customer Support

Installation & Training - 1 week, acceptance test

Support
Guarantee 1 year, free of charge phone and email support over lifetime of instrument

Part Supply
10 years guaranteed

Manuals - Full Operations and Data Analysis Manuals with Tutorials

Software

Control Software
National Instruments Labview based ARC-ES Control Software
Full on-the-fly change of test conditions
Full on-the fly operation

Remote User facilities
Ability to transfer operation on system to any allowed PC over network or internet

Virtual Technician facility
Set up multiple tests in one method

Data Analysis Software
National Instruments Labview based ARCCAL+ analysis software
Features include: Graphical and tabulation of raw data including Phi Corrected TMR plots
Data Conversion to Enthalpy, Power, Gas Generation
Kinetic Modelling for thermodynamic and kinetic data analysis
Phi Correction through kinetic modelling
Report generation in Microsoft Word, Excel, HTML
Analysis of 9 concurrent data sets; 3 analyses on each data set, merge all datasets to a single plot.