The transported-6300 temperature sensor line provides economical solutions for a wide variety of temperature sensing needs, including Wall-Mount, outdoor-air, duct, strap-mount, well-insertion, duct-averaging, and variable air volume (Valve) Flange-Mount duct-probe applications. The transported-6300 line offers both a metal and a plastic enclosure for the most popular models. made in United States. Manufactured by Johnson Controls.