Sigma Systems mechanically cooled temperature chambers provide are the perfect choice for clean room applications, for applications requiring long soaks at low temperatures, or where cryogenic coolants are not available. Refrigeration cooled chambers are slower ramping and have far less heat absorption capacity than their cryogenic counterparts. However, they operate for less per hour in steady state and stable conditions, so are ideal for long term tests that do not involve fast ramps. If high speed ramps are needed, the addition of a cryogenic boost to the chamber will deliver faster ramp rates.
Mechanically cooled chambers are standard with the Model C4 controller.
All Sigma mechanical refrigeration systems breathe air in from the front and out the back so they can be placed tightly next to other equipment or cabinets without loss of air flow. Each system is designed to be as quiet and compact as possible.
Sigma mechanically cooled chambers deliver exceptionally low gradients and reliable performance. Sigma uses high performance electric resistance heaters to provide smooth and fast heating. Sigma's unique design delivers the some of the fastest cooling transitions available - 10.8°C per minute and better. Cooling rates can be greatly accelerated with the addition of an optional cryogenic boost that helps the chamber transition quickly at up to 70°C per minute. Sigma provides mechanically cooled chambers with single or double compressor (cascade) designs, providing a low operating temperature of –85°C.
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