TPP / HTP Test Device

Evaluate a fabric’s ability to block convective and radiant heat penetration to avoid burn injury.

Predict burn injury for thermal protective fabrics

The Thermal Protective Performance device (TPP) was developed to measure the time elapsed for convective and radiant heat to penetrate through a protective composite fabric system - resulting in a burn injury to human skin. Test results are automatically compared to the Empirical Performance Curve (also known the Stoll Curve), which predicts a second degree burn to human skin as a function of heat and time. The point of intersection between sensor data and the Empirical Performance Curve provides the composite fabric’s TPP rating.

Innovative design for improved testing throughput

Also known as a Heat Transfer Performance Device (HTP), the Thermetrics TPP features a heat source consisting of two propane burners and a 9-bulb quartz infrared heat lamp assembly. The system is automated by using a pneumatically actuated sample carriage, water-cooled shutter, and mass flow controller, with three thermocouple input channels and an integrated sensor cooling stand for improved testing throughput. All TPP/HTP Test devices come with come with laptop PC and ThermDAC Burn Model software, which processes sensor data and calculates the degree of predicted burn injury.

TPP’s docs and resources

TPP’s tech specs

  • Independently controlled radiant heat source and convective heat source.
  • Supports up to three copper calorimeter sensor assemblies.
  • Compact size fits in most standard fume hoods.
  • Complies with ISO 17492, ASTM F2700 and F2703, NFPA 1971, 1977, and 2112.
  • Propane gas burners feature auto ignition and a flame detection sensor.
  • For more technical information, view the product spec sheet.

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