SATRA STM 472 Cold insulation tester
This machine is designed to assess the insulation properties of footwear against cold temperatures. The equipment forms part of a suite required by the safety footwear standard, but can also be used for any application where footwear needs to withstand cold temperatures.
The equipment comprises a freezer cabinet capable of achieving -20°C (subject to ambient temperatures), a measuring probe to measure the internal temperature of the footwear and steel balls used to fill the footwear under test.
The footwear is placed in the freezer cabinet, using the jack table provided, so that the open part of the footwear protrudes through the opening in the inner lid. The probe is placed on the insole. Temperature of the insole is shown on an LCD display located on the control cabinet.
A digital temperature controller with a built-in display accurately controls the freezer temperature and the difference between the freezer temperature and insole temperature determines the amount of thermal insulation.