How do I confirm this fits my specific Armstrong unit

This Dual Differential Pressure Switch is factory-calibrated to a

Flexible Mounting: Designed for vertical mounting to maintain high sensitivity and accuracy at low set points

and Miller a-coils

this replacement coupling ensures the structural integrity of the secondary loop or main header connections

KMC Controls CTE-5202 Electronic Stat Els PW 17895 How do I confirm thisThe KMC Controls CTE 5202 is a high performance, 24V dual setpoint electronic thermostat specifically engineered for precision in commercial HVAC applications. Utilizing Proportional + Integral (PI) control, this analog electronic controller provides two independent loops for heating and cooling, ensuring stable room temperatures without the cycling common in standard thermostats. It functions as the direct modern replacement for legacy models