Schneider Electric TK-1101 Pneumatic Thermostat 55°F-85°F 2-Pipe Range

The TK-1101 is a two-pipe pneumatic thermostat made by Schneider Electric (Barber Colman). It controls temperature in HVAC systems using compressed air instead of electricity. The range it can handle is 55 to 85 degrees Fahrenheit, making it suitable for various applications. It is compatible with different HVAC equipment such as furnaces, air conditioners, and heat pumps. Here's how it works: The thermostat has an internal diaphragm that expands and contracts based on the surrounding temperature. This movement translates into a change in air pressure within the two pipes. The connected HVAC equipment interprets this pressure change and adjusts its operation to maintain the desired temperature. The TK-1101 pneumatic thermostat is a reliable and versatile pneumatic thermostat for controlling temperature in HVAC systems.