Ultra Low Temperature Chambers
Extended-Range Cold Testing Down to -85°C for Temperature Characteristic and Storage Testing
Most industrial temperature chambers cover down to around -40°C to -55°C, which is enough for general product qualification but falls short of what aerospace, defence, and specialised electronics work actually requires. Components destined for high-altitude flight, satellite payloads, or cold-region military deployment are routinely specified to survive storage or operation down toward -85°C — a range standard chambers simply aren't built to reach. Sonacme's ultra low temperature chambers extend the cold end specifically for this purpose.
Two models are available: the SUT/64/75 (-75°C to +100°C) and the SUT/64/85 (-85°C to +100°C), both with +150°C or +180°C available as a high-temperature option. Both are used for two related but distinct test purposes — temperature characteristic testing, which evaluates how a product's electrical or mechanical performance changes as temperature drops, and low-temperature storage testing, which confirms a product survives extended dwell time at its rated minimum storage temperature without physical or material degradation once returned to normal conditions.
Both share the same construction: a 1.0mm SUS304 stainless steel inner chamber, a 1.5mm cold-rolled steel outer shell, 100mm polyurethane foam insulation, a double silicone rubber door seal and a four-layer tempered glass observation window. Refrigeration uses Tecumseh (France), Bitzer or GEA Bock (Germany) compressors with Danfoss and Saginomiya solenoid valves.
Choosing between the two comes down to what the test specification actually calls for. If a project's coldest requirement sits above -75°C with margin, the SUT/64/75 covers it. Where a standard or customer requirement calls for qualification at or near -85°C — common in aerospace and defence storage specifications — only the SUT/64/85 provides the necessary margin.
