Features a Burns custom quarter turn twist lock probe fitting designed for use with the HD05 or HD03 connection heads provides easy installation or removal of the probe for calibration or replacement without disconnecting conduit or thermowell. Spring loading The heads are large enough to house any of the Burns transmitters in addition to the Rosemount Model 644. When mated to a thermowell hazardous area ratings are available up to Class 1 Division 1, Groups ABCD.

Series 100 Standard Spec. Sheet  

https://burnsengineering.com/wp-content/uploads/2021/05/Series-100.pdf