Siemens Building Technology QPA2000 Sensor

The Siemens QPA2000 is a high-precision room air quality sensor engineered to monitor CO2 concentration in commercial HVAC systems. Designed for demand-controlled ventilation (DCV), this unit provides a linear 0-10Vdc output signal corresponding to a 0-2000 PPM CO2 range, ensuring optimal indoor air quality and energy efficiency. It serves as the 90DM3ASM-1 replacement, offering a seamless fit for legacy system upgrades. The sensor utilizes a maintenance-free infrared absorption cell (NDIR) to maintain long-term stability and calibration accuracy. With its rugged housing and terminal block connection, the QPA2000 room sensor is built for quick installation by contractors working on LEED-certified buildings or standard office environments. This non-display model provides a discreet, tamper-proof solution for HVAC CO2 monitoring, integrating directly into building automation systems via standard analog inputs to manage outdoor air intake based on real-time occupancy loads.

• Universal Compatibility: Standard 0-10Vdc output signal integrates easily with most BAS and DDC controllers.
• Maintenance-Free Operation: Advanced NDIR sensing technology prevents drift, eliminating the need for frequent field recalibration.
• Legacy Support: Specifically designed as the direct 90DM3ASM-1 replacement to simplify retrofitting projects.
• Precise CO2 Range: Monitors 0-2000 PPM CO2 levels to meet ASHRAE 62.1 ventilation standards.
• Durable Construction: Features a robust terminal block for secure, reliable wiring in high-traffic commercial zones.

How should the QPA2000 be positioned for accurate CO2 sensing?
Mount the sensor approximately 5 feet above the floor on an interior wall, avoiding areas with direct sunlight, drafty windows, or proximity to supply air diffusers which can skew room air quality sensor readings.

Does this unit require specialized software for configuration?
No, the QPA2000 is an analog device. Once wired to the terminal block connection and powered by a 24VAC/VDC source, it begins transmitting the 0-10V signal proportional to the detected CO2 levels.

Why choose the QPA2000 over a model with a display?
In high-traffic or public areas, HVAC CO2 monitoring sensors without displays prevent tampering and reduce visual distractions, while still providing full data granularity to the head-end controller.

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.