A gold color metal and enamel device 1 3/16 inches (3.02cm) in height overall consisting of a gold eagle affronté, grasping its beak a pair of blue enamel scales, it lower body and legs surmounted by a blue enamel seven pointed star on which is centered a white enamel globe with gold rim and gridlines all supported by a gold oval-shaped laurel wreath; above the eagle's head and surmounting the top of the laurel wreath on each side a blue arced scroll inscribed "TMDE" in gold letters.
The eagle represents the military nature of the United States Army Test, Measurement and Diagnostic Equipment Support Group. The balance denotes the functions of measurement and calibration, and the requirements for accuracy and precision. The star and globe suggest worldwide service and multi-directional support. Blue and white allude to the exacting standards met by the organization in accomplishing its unique mission. The gold laurel wreath, symbolic of excellence and achievement, represents the organization's significant role in the United States Army.
The distinctive unit insignia was approved on 22 Jul 1983.