The sweating guarded hotplate (often referred to as the “skin model”) is intended to simulate the heat and mass transfer processes that occur next to human skin. Measurements involving the water vapor resistance (R_et) or thermal resistance (R_ct) may be carried out separately using an electrically heatable porous plate. Samples, e.g., fabrics, films, including multilayer assemblies, similar textile or textile-like products.

The hotplate can be used to:

• Determine the thermal and evaporative properties of single- and multi-layer fabric assemblies in accordance with relevant standards;
• Compare samples with previous prototypes, competing products, or required performance criteria specified in standards. 
   

• DIN EN ISO 11092:2014 Textiles - Physiological effects - Measurement of thermal and water-vapour resistance under steady-state conditions
• ISO 20852:2020 Textiles - Determination of the total heat transfer through textiles in simulated environments

Annaheim, S., Wang, Lchu, Psikuta, A., Morrissey, M. P., Camenzind, M. A., & Rossi, R. M. (2015). A new method to assess the influence of textiles properties on human thermophysiology. Part I. Thermal resistance. International Journal of Clothing Science and Technology, 27(2), 272-282. DOI