How can I freeze a box to a temperature of at least -50C?
It doesn’t have to be very big, perhaps just a few centimeters/inches on each edge of the box/cube. It just need to be vibrationless and very cold. It also doesn’t have to last very long at that temperature, it just needs to reach it for a minute or so.
This is for temperature compensation/calibration of some MEMS components.
This question is in the General Section. Responses must be helpful and on-topic.