Foxboro 135-T Pneumatic Indicating Controller with a 3–15 lbf/in² (psi) signal range is a compact pneumatic device designed for process-control applications that rely on air-pressure signals to indicate process conditions. The model 135-T delivers a pneumatic output within the 3–15 psi range, making it compatible with standard pneumatic control loops and instrumentation in industrial environments. It serves to monitor and indicate process variables in systems where a pneumatic signal interfaces with other control elements.
