supporting multiple mounting configurations for faster service calls

While physical dimensions may match

Constructed to meet rigorous industrial standards

which serves as the "brain" for larger main valves in pilot-operated systems

It is primarily designed for the Peco T8532 and TA155 series but functions with any controller calibrated for Type 2 thermistors

Johnson Controls T-4000-2139 Cover supporting multiple mounting configurations forThe Johnson Controls T 4000 2139 is a professional grade horizontal thermostat cover designed specifically for the T 4000 Series pneumatic room thermostats. Engineered for sleek, unobtrusive installation, this beige plastic cover features a clean aluminum faceplate without a thermometer window or setpoint adjustment openings. This configuration is ideal for facilities where unauthorized tampering must be minimized while maintaining a uniform aesthetic