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Guarded Hot Plate Heat Flow Thermal Conductivity Tester for Insulation Materials

Published: 11/22/2023

The DRH300 measures thermal conductivity and thermal resistance of insulation and other plate-like materials using a guarded hot plate heat flow method. It supports automated temperature control, data acquisition, analysis, and report generation in accordance with ASTM C518, ISO 8301, and GB/T 10295.

Product Description

The DRH300 is designed for precise and repeatable determination of thermal conductivity and thermal resistance of insulation boards and other materials such as clays, sands, ceramics, and plastics. A symmetric dual heat-flow sensor configuration with independently controlled hot and cold plates enables rapid stabilization and reliable results for both quality control and process monitoring.

All test functions—from temperature control to data acquisition and analysis—are automated, with options for upper-computer control or an embedded touchscreen interface depending on user preference. The system can generate test reports, store data, and allows users to terminate or extend measurement durations based on stability and accuracy requirements.

Technical Specifications

ParameterSpecification
ComplianceASTM C518; ISO 8301; GB/T 10295
Measurement MethodGuarded hot plate, dual heat-flow meters (symmetric)
Thermal Conductivity Range0.005 to 2.0 W/(m·K)
Accuracy< ±3% (at 25°C ambient)
Repeatability±1%
Thermal Resistance Range0.1 to 8.0 m²·K/W
Sample ConfigurationSymmetric between hot and cold plates
Sample Size300 × 300 mm
Sample Thickness10 to 50 mm
Hot Plate Maximum Temperature100°C
Cold Plate Minimum Temperature−30.0°C
Cold Plate Temperature Control Stability±0.1°C
Temperature Readout Resolution0.01°C
Controller Precision Class0.1
Hot-Side Temperature Control RangeAmbient to 99.99°C
Hot Plate ControlFlat heater, bidirectional SCR control
Temperature Control ModeAutomatic intelligent PID, programmable (>10 setpoints)
Cooling OptionsForced air; external water bath; electronic refrigeration (select one)
OperationComputer-automated testing; optional embedded touchscreen HMI
Custom OptionsTest temperature range customizable
Standard ConfigurationTest host; analysis software; low-temperature bath; desktop computer and printer

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