Siemens Building Technology QPM2100 Sensor

The Siemens Building Technology QPM2100 Sensor is a high-precision duct air quality sensor engineered for demand-controlled ventilation in commercial HVAC systems. Utilizing non-dispersive infrared (NDIR) technology, this maintenance-free CO2 transmitter provides reliable 0-2000 PPM CO2 monitoring without the need for periodic recalibration. It serves as the direct replacement for the legacy 90DM3ADT-1, offering seamless integration into existing BAS architectures via a standard 0-10Vdc output signal. Designed for versatility, the probe features an adjustable insertion depth ranging from 2.75 to 4 inches, allowing for optimized placement within various duct diameters to ensure representative air sampling. The rugged housing is rated for AC 24V or DC 15-35V operation, featuring a secure terminal block connection for field wiring with 18 to 22 AWG shielded cable.

Key Benefits

• Maintenance-Free Operation: The NDIR sensing element provides long-term stability and eliminates the labor costs associated with manual CO2 sensor calibration.
• Broad Compatibility: A field-selectable 0-10Vdc output signal ensures this unit is compatible with most building automation systems (BAS) and HVAC controllers.
• Optimized Energy Efficiency: Enables demand-controlled ventilation (DCV) to reduce outdoor air intake during low occupancy, significantly lowering heating and cooling loads.
• Precise Duct Integration: The adjustable probe length and included mounting flange permit accurate positioning in the center of the airflow for high-accuracy readings.
• Robust Replacement: Serves as a direct drop-in for the Siemens 90DM3ADT-1, simplifying HVAC sensor maintenance and system upgrades.

Common Questions

The unit features a terminal block for AC 24V or DC 15-35V power supply. Conductors should be 18 to 22 AWG, and for 0-10V applications, ensure the common ground is correctly shared between the sensor and the controller input to prevent signal drift.

No, the QPM2100 uses infrared CO2 sensing technology that is self-correcting and maintenance-free, making it ideal for facilities that are occupied 24/7 where manual calibration is impractical.

Yes, this sensor is rated for air velocities up to 10 m/s. It is important to mount the sensor head higher than the probe and ensure the cable entry points downward to maintain the IP54 protection rating against moisture infiltration.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.