LECO AC500 Isoperibol Calorimeter for Gross Calorific Content

The AC500 determines calorific value—one of the most important indicators of quality and value in solid and liquid fuels—by accurately measuring the heat released during sample combustion. This standalone benchtop isoperibol calorimeter features a fully integrated circulation system, delivering a compact footprint without the need for external heaters or coolers.

An integrated water-measuring station simplifies sample preparation, while a high-precision electronic thermometer with a resolution of 0.0001 °C records temperature every six seconds. Two-channel temperature correction is enabled through continuous monitoring of both the outer jacket and the calorimeter bucket, ensuring reliable and reproducible calorific value results across a wide range of operating conditions.

LECO AC500

Key Features

• High-precision calorific value determination across varying sample sizes and ambient conditions
• Fully integrated circulation system for compact, standalone operation
• Integral water-measuring station to simplify sample preparation
• Electronic thermometer with 0.0001 °C resolution for precise temperature measurement
• Temperature recorded every six seconds for accurate heat profile tracking
• Two-channel temperature correction via constant monitoring of jacket and bucket
• Support for multiple analysis modes:
  • Regnault-Pfaundler
  • Precision
  • Predictive
• Combustion vessel options with fuse wire or string ignition
• Optional string-ignition vessel eliminates wire connections for simplified handling

Available Models

• AC500 – without combustion vessel
• AC500 – with wire igniter vessel
• AC500 – with string igniter vessel