The 491020-2066 PTFE Heater Jacket is designed for use with model 1002390200 buttweld 90 degree elbow with standard modulus and 2.0 inch diameter vacuum tubing and operates at 200-240 VAC. Series 49T PTFE Teflon®-Woven Heater Jackets provide maximum performance, utilizing a proprietary Teflon woven shell for achieving ultra-low particulate generation and preventing surface contamination. This low outgassing product is ideal for customers that need low Volatile Organic Compound (VOC) in the work area. These heaters are constructed with fully squared ends and a shape to provide maximum energy efficiency and thermal uniformity. PTFE heaters are generally used in critical applications where elevated temperatures up to 200°C, and low VOCs are required. The new advanced Series 49 controller technology allows for more versatility providing maximum flexibility in system configuration. This unique controller integrates a temperature process controller, a high-low temperature alert, power switching with a safety high limit, and detailed diagnostics. The user friendly Series 49 User Interface System allows quick and easy set up and operation with a downloadable software application that provides full access to all functions of the Series 49 heater control system. The application provides intuitive system control set up, monitoring, diagnostics and parameter adjustments creating a user friendly experience. The User Interface System adjusts variables such as temperature set points, upper and lower temperature threshold alarms, control parameters, and heater identification as well as advanced parameter setting for users to fine-tune the Series 49 heater network. The user interface app contains a sequential auto-addressing function which automatically sets the address of the heater controllers in a network, ensuring accurate communication and identification of each connected heater.