Enhanced power cycling thermoelectric modules provide one million temperature cycles

Laird has improved its advanced PC Series Power Cycling thermoelectric module (TEM) for applications that require high reliability and high volume thermal cycling between multiple temperature set points. The enhanced PC Series is now proven to perform more than one million temperature cycles, extending the mean time between failure (MTBF) in molecular diagnostics, clinical diagnostics, analytical instrumentation, and more. Thermal cycling exposes TEMs to mechanical stresses as the module contracts and expands from repeated cooling and heating cycles. Standard TEMs are traditionally designed for refrigeration applications only. The high-temperature diffusion of impurities and mechanical stresses over time can significantly reduce the operational life of a standard TEM. The thermoelectric modules are specially constructed to reduce the amount of stress induced on the thermoelectric elements during operation. This enables the high number of temperature cycles. Combined with an operating temperature up to 120C, the series exceeds the requirements for high volume power cycling applications. In addition, the series provides a lower total cost of ownership, while increasing throughput of diagnostic equipment. "In modern diagnostic and analytical instruments, thermoelectric modules are typically used to achieve the rapid temperature changes. Laird's thermoelectric modules offer significant advantages when compared to other types of thermal cycling devices including more precise temperature control, compactness, faster temperature ramp rates and efficiency," said Anders Kottenauer, senior vice president of Laird's Engineered Thermal Systems. "We are ecstatic to announce another milestone in the Power Cycling PC Series technology, achieving 1-million thermal cycles with minimal degradation."