Adiabatic calorimeter ARC® 305

high-temperatureisothermalhigh-volume

Product overview
The Accelerating Rate Calorimeter ARC® 305 is an adiabatic calorimeter for controlled laboratory evaluation of thermochemical behavior. It records temperature and pressure simultaneously in a sealed pressure system and supports solids, liquids and mixtures (gas/liquid, liquid/liquid, gas/solid, liquid/solid). Typical uses include thermal hazard evaluation, pressure-hazard evaluation, thermokinetic analysis, process simulation (batch or semi‑batch), fire‑exposure simulation and vent studies.

Key capabilities

• True adiabatic calorimetry to detect heat release and thermal runaway behavior
• Simultaneous temperature and pressure measurement in a sealed vessel
• Fast tracking rates up to 200 K/min for broader application range and more reliable kinetics
• Support for vessel sizes from spherical 1 ml up to 130 ml and tube-type vessels (~1–9 ml)
• Versatile operating modes: isothermal, scanning, fire‑exposure, venting and low‑phi testing
• Stirring, sample injection during runs and controlled gas-atmosphere testing

Special technologies and software

• VariPhi technology (patented): internal/immersion heater concept enabling controlled PHI (Φ) variation for accurate low‑phi tests and fire‑exposure simulation
• Proteus® control and analysis software: unified NETZSCH software for instrument control and data integration
• Intelligent firmware and instrumentation monitoring with continuous data saving and independent safety layers

Method / Test options

• Isothermal mode for true isothermal calorimetry and controlled‑rate investigations
• Scanning mode (VariPhi scanning) to detect exothermic/endothermic transitions and heat capacity faster than typical DSC
• Fire‑exposure mode: energy influx compensation to simulate phi = 1.0 conditions
• Venting / vent studies for process‑safety simulations evaluating pressure rise and relief behavior

Gaseous product analysis
Gaseous reaction products can be collected after experiments to support reaction‑mechanism interpretation and identification of volatile decomposition products.

Design & safety

• Robust pressure‑rated sealed system with standard safety features
• Multiple independent safety systems (hardware and firmware)
• Ergonomic laboratory design for easy access to routine components

Applications & typical uses

• Process safety and hazard evaluation
• Energetic materials characterization
• Battery testing and thermal runaway studies
• Thermokinetic parameter extraction and modeling
• Fire testing and heat‑of‑reaction determination

Characteristics / Technical specifications

• Temperature range: RT to 500 °C
• Fastest tracking rate: up to 200 K/min
• Standard pressure range: 0 to 150 bar
• Pressure accuracy: 0.35% full scale (150 bar)
• Sample vessel volumes: spherical 1 ml to 130 ml; tube‑type ~1–9 ml
• Typical vessel materials: stainless steel, Hastelloy, glass; optional titanium, tantalum
• Reference: measurement concept related to ASTM E1981
• Main features: simultaneous T and P measurement, stirring, injection, sealed gas atmosphere capability, VariPhi low‑phi testing, Proteus® software, continuous data logging