standard adapters can be used if your specific pneumatic logic layout requires different connection types

the 157S series features an integral water column body

which is essential for proper communication with the HVAC system's main control board

As a technician-grade HVAC replacement part

maintaining the precise tension and alignment required for long-term HVAC blower motor efficiency

Siemens Building Technology QFM3101 Sensor 322838-753 standard adapters can be usedThe Siemens Building Technology QFM3101 is a high precision duct relative humidity sensor designed for demanding building automation and HVAC control applications. Featuring a robust 4 20mA output signal, this sensor provides a linear 0 100% RH measurement with a strict 2% accuracy rating. Engineered for professional grade reliability, it functions as a direct functional cross for the HD2XMSX, ensuring seamless integration into existing control loops