Sweating guarded hotplate is the textile testing instrument for measuring of thermal and water-vapour resistance properties under steady-state conditions. By testing the thermal resistance and water-vapour resistance of textile materials, the tester provides a direct data for characterizing the textiles’ physiological comfort which involve a complex combination of heat and mass transfer. The hotplate is intended to simulate the heat and mass transfer processes which occur next to human skin and measure the hence transport properties in a steady-state conditions involving combinations of temperature relative humidity, air speed, and in liquid or gaseous phase.
| Hotplate | Test plate, guard section, bottom plate |
| Test plate | 250mm × 250mm × 3mm porous metal plate |
| Thermal resistance range | 0–2 m²K/W |
| Indicating error (thermal resistance) | ≤2% |
| Repeatability (thermal resistance) | ≤±2% |
| Resolution (thermal resistance) | 0.001 m²K/W |
| Water-vapour resistance | 0–1000 m²Pa/W |
| Indicating error (water-vapour) | ≤2% |
| Repeatability (water-vapour) | ≤±2% |
| Resolution (water-vapour) | 0.01 m²Pa/W |
| Moving stroke of hotplate | 0–70mm |
| Air speed | Adjustable 0–2 m/s |
| Indicating error (air speed) | 1% |
| Testing conditions | Standard mode and user defined mode |
| Power supply | 220V 50Hz |
| Dimension | 780mm × 560mm × 750mm |
| Net weight | 30kg |
ISO 11092 GB/T 11048 ASTM F1868 ASTM D1518 JIS L1096
| No. | Product |
| 2037701 | Sweating guarded hotplate |
| 2037702 | Computer with analysis software |
| 2037703 | Temperature and humidity chamber |
| 2037704 | Nomex defender 750 yellow for ASTM F1868 |