A cascade refrigeration unit is a type of refrigeration system that consists of two or more individual refrigeration cycles operating in tandem to achieve lower temperatures than a single-cycle system could achieve. It is commonly used in applications where extremely low temperatures are required, such as in industrial processes, scientific research, or specialized cooling systems. The key components of a cascade refrigeration unit typically include two or more separate refrigeration cycles, each with its own set of components, including compressors, evaporators, condensers, and expansion valves. The cycles are arranged in a cascading manner, with the refrigerant from the first cycle (the high-temperature cycle) being used to cool the evaporator of the second cycle (the low-temperature cycle). This allows for more efficient cooling at very low temperatures. Cascade refrigeration units can also have more than two cycles, depending on the desired temperature range and specific requirements of the application. Each additional cycle allows for even lower temperatures to be achieved in a stepwise manner.

The chambers are provided with PLC with LED backlight, offering 16 million colours. It features multiple communication options, including RS-232, RS-422/485, and Ethernet for remote control and external device connectivity. Dual USB ports support various external devices.The device has three user-programmable soft keys with LED indicators, ample onboard memory, and expandable SD card storage. It offers faster programming, PID control options, user-scaled real-time trend monitoring, and demand-driven autotuning. Additionally, it provides three levels of security for user access control.