HATS™ Coupons are Daisy Chain electrical coupons and can be electrically tested with other Thermal Shock Technologies that electrically test Daisy Chains, including Dual Chamber. The HATS™ Tester uses High Speed Air as the heat transfer (fluid) mechanism to heat and cool the test coupons along with a Keithley System meter to make accurate and repeatable 4-wire resistance measurements of the coupons. Other technologies use different heat transfer fluid Mechanisms like Oil, Nitrogen, Sand or Internal Conduction to transfer heat to the coupons which results in different heat transfer rates to the coupons. Other Thermal Shock Technologies use different electrical measurement techniques (2-wire, 3-wire, etc.) and meters/switching systems that may not have the accuracy and repeatability of the HATS™ tester. These differences mean that HATS™ Testing Technology and cannot be directly compared to other non Dual Chamber Thermal Shock Technologies. HATS™ Testers use air as the heat transfer mechanism just like the tried and true method used by Dual Chamber thermal shock testers for the last 50+ years. HATS™ testing requires a HATS™ tester. HATS™ testers can test 36 (4 net) coupons for a total of 144 daisy chain test nets per test run. Doing 1000 cycles of that many coupons/nets with other technologies can take weeks if not months due to their limited capacity (6 or 12 coupons). The HATS™ tester does 1000 cycles of 36 coupons/144 nets in less than a week. Carefully research the methodologies out there before you decide.