A HAST chamber is used to perform Highly Accelerated Stress Tests, or HAST, in test applications that require intense pressure and temperatures above 100°C. Highly Accelerated Stress Test chambers allow operators to complete humidity resistance testing in days rather than weeks, an essential feature for test engineers measuring the environmental resistance of semiconductors and other electronic components. Leading HAST chamber manufacturers like Espec offer chambers with features like automatic humidity filing, automatic door locks, a streamlined hermetic power-pin system for bias tests, and a double-unit vessel size that gives twice the test capacity without doubling footprint.