Common Questions What is the difference between the P100AP-4 and P100AP-4C

preserving system design integrity

and springs—necessary to restore factory-spec sealing and response times

Technicians typically encounter lockout codes indicating "pressure switch stuck open" or "stuck closed

ensuring compatibility with most electronic controllers and PLC systems requiring high-precision thermal data

Johnson Controls T-5500-1053 Indicator Refrigerant Common Questions What is theThe Johnson Controls T 5500 1053 is a pneumatic temperature indicator designed for continuous visual monitoring in 3 to 15 psig pneumatic transmission systems. Featuring a 3. 5 inch dial with a high contrast white face and black printing, this gauge provides precise readings across a 50F to 150F range (dual scale with Celsius). The T 5500 1053 is the direct functional cross for KS 9047, ensuring seamless integration into existing control panels where