Protective Test System - Accessories – Copper Calorimeters

Precision sensors for reliable repeatable results

Determine heat transfer rates in textiles

Thermetrics has designed and engineered its own line of Copper Slug Calorimeter Sensors for the TPP, RPP, CCHR, and other thermal protection test devices. Each sensor includes an insulation block and removable thermocouple extension wire and is calibrated in Thermetrics ISO 17025 accredited laboratory. Thermetrics sensors are J-Type thermocouples, built using 32 AWG SLE thermocouple wire. 32 AWG wire produces a faster response time than the more common 30 AWG wire and remains in full compliance with the standards. The insulation block is non-combustible, dust-free and contains no asbestos, mercury or lead.


  • Sensor dimensions are compliant with ASTM guidelines to be interchangeable across all models and manufacturers of TPP and RPP devices
  • Engineered to be durable and accurate while still meeting current requirements
  • Copper slugs are machined to precise weight (+/-0.01 grams) and dimensional (12.57 +/-.07 cm2) tolerances


Learn more about test standards


Parts store

Order parts direct from online


Service plans

Find a service plan



description goes here