Abstract: A thermogravimetric balance includes a bridge assembly carried by a torque motor, said bridge assembly having, at one end, riser mechanism for carrying a sample pan, and at the other end, first magnetic means for regulating said bridge; further magnetic means positioned intermediate said riser and said first magnetic means for further regulating said bridge; and a furnace device movably encompassing the sample pan.

Abstract: An improved furnace tube, for use in a thermobalance, including an inner tube secured to an outer tube, said outer tube including (1) an inlet in communication with a coiled passageway which terminates in a diffuser, and (2) an outlet; said inner tube including passageways through an end thereof for accommodating both a beam and thermocouple means; and coupling means for joining together said inner and outer tubes as well as linking said tubes, collectively to a balance housing.