(under subclass 863) Subject matter including means to actively change or maintain the temperature of the source or sample.
(1) Note. The use of heat insulation alone is insufficient basis for classification in this subclass.
(2) Note. A sampler which changes or maintains the temperature of a sample due to eutectic or latent heat (phase change) is included here, but a device utilizing solely the thermal capacity of thick-walled molds are found in subclasses 864.53+.
