SIEMENS QAM2120.200 Mixed Gas Air Quality Sensor High Range

The SIEMENS QAM2120.200 Mixed Gas Air Quality Sensor High Range is a sophisticated device engineered for precise environmental monitoring in demanding industrial and commercial settings. This sensor excels due to its rapid response time, high accuracy across a broad measurement range, and robust construction designed for longevity. Key technical parameters include a measurement range for CO2 of 0–2000 ppm, for VOC (as formaldehyde) of 0–1000 ppb, and for CO2 compensation of temperature and humidity, ensuring reliable performance even in fluctuating conditions. Its operational temperature range spans from 0 to 50°C, with a storage temperature range of -20 to +70°C, and it operates on a power supply of 24 VAC/VDC. The sensor outputs a standard 0–10 V signal for CO2 and VOC levels, facilitating seamless integration into building automation and control systems.

Product Specifications

| Parameter             | Specification                                    |

| :-------------------- | :----------------------------------------------- |

| CO2 Measurement Range | 0–2000 ppm                                       |

| VOC Measurement Range | 0–1000 ppb (as formaldehyde)                     |

| CO2 Compensation      | Temperature and humidity                         |

| Output Signal         | 0–10 V (for CO2 and VOC)                         |

| Power Supply          | 24 VAC/VDC                                       |

| Operating Temperature | 0 to 50°C                                        |

| Storage Temperature   | -20 to +70°C                                     |

| Dimensions            | 93 x 93 x 36 mm                                  |

| Protection Class      | IP20                                             |

Core Features & Market Positioning

The SIEMENS QAM2120.200 distinguishes itself in the competitive air quality sensing market through its multi-gas sensing capability, offering simultaneous detection of CO2 and VOCs. This integrated approach simplifies installations and reduces costs compared to deploying separate sensors for each parameter. The sensor's high-range CO2 measurement up to 2000 ppm makes it suitable for applications where elevated CO2 levels are anticipated, such as in densely occupied spaces or areas with significant industrial off-gassing. Its advanced digital signal processing ensures a stable and accurate reading, minimizing drift and enhancing long-term reliability. This positions the QAM2120.200 as a premium choice for building management systems focused on occupant comfort, health, and energy efficiency, particularly within smart building frameworks.

Key Application Scenarios

The SIEMENS QAM2120.200 is ideally suited for a variety of critical applications. In commercial buildings, it is deployed in offices, conference rooms, and auditoriums to optimize ventilation rates based on real-time occupancy and air quality, thereby improving occupant well-being and reducing energy consumption. Educational institutions utilize these sensors in classrooms to maintain optimal learning environments. Healthcare facilities, including hospitals and clinics, benefit from the QAM2120.200's ability to monitor air quality in patient rooms, operating theaters, and laboratories, ensuring adherence to stringent health standards. Industrial settings with potential for volatile organic compound emissions, such as manufacturing plants and research facilities, can leverage this sensor for process monitoring and safety compliance.

Practical System Integration Guidance

Integrating the SIEMENS QAM2120.200 into existing building automation systems is streamlined due to its standard 0–10 V analog output signals. These signals can be directly connected to compatible controllers, such as Siemens Desigo or third-party DDC systems, via a standard three-wire connection. Power is supplied through a 24 VAC or 24 VDC source, requiring careful attention to polarity if using DC. The sensor is designed for easy wall mounting; it is recommended to install it at breathing zone level (approximately 1.5 meters above the floor) in an area with good air circulation, avoiding direct sunlight or proximity to heat sources, which could affect readings. Calibration is typically performed at the factory, but periodic checks and recalibration may be necessary depending on environmental conditions and application requirements.

Operation and Risk Mitigation

Proper operation of the SIEMENS QAM2120.200 involves ensuring it is installed in an environment within its specified operating temperature and humidity ranges to maintain sensor accuracy and longevity. Avoid exposing the sensor to corrosive gases or airborne particulates that could impede its performance or cause physical damage. Regular visual inspections for dust accumulation on the sensing element are recommended. In case of unusual readings or system alarms, consult the product manual for troubleshooting specific to the output signals and potential faults. While the sensor itself does not present significant operational risks, incorrect wiring or power supply can lead to malfunction or damage to the sensor or connected control system. Ensure all electrical connections are made by qualified personnel.

Scalability & Long-Term Value

The SIEMENS QAM2120.200 offers excellent long-term value through its compatibility with the broader Siemens ecosystem and its ability to integrate into advanced digital solutions. Its standard analog outputs ensure backward compatibility with many existing building management systems, allowing for phased upgrades. For organizations moving towards the Industrial Internet of Things (IIoT), the sensor's data can be readily integrated into cloud-based platforms or data analytics software via gateways, enabling predictive maintenance, enhanced energy management, and deeper insights into building performance. The robustness of the QAM2120.200 ensures a long operational lifespan, minimizing replacement costs and supporting sustainable building operations.

FAQs

What is the primary function of the SIEMENS QAM2120.200 sensor?

The SIEMENS QAM2120.200 is a mixed gas air quality sensor designed for high-range CO2 and VOC detection. It monitors indoor air quality and provides data for ventilation control.

It measures CO2 levels up to 2000 ppm and VOCs as formaldehyde up to 1000 ppb. The sensor also compensates for temperature and humidity.

Its output signals are used by building automation systems to maintain optimal environmental conditions and improve energy efficiency.

How does the SIEMENS QAM2120.200 measure VOCs?

The sensor detects volatile organic compounds (VOCs) and quantifies them as an equivalent concentration of formaldehyde. This provides a standardized metric for a broad spectrum of airborne organic pollutants.

It utilizes advanced sensing technology to identify and quantify the presence of various VOCs that can impact indoor air quality.

This measurement helps in identifying sources of pollution and in adjusting ventilation to mitigate potential health effects from VOC exposure.

What are the power requirements for the SIEMENS QAM2120.200?

The SIEMENS QAM2120.200 operates on a standard power supply of 24 VAC or 24 VDC. It's crucial to connect the correct voltage to prevent damage.

Ensure that the power source is stable and within the specified voltage range for optimal performance and longevity.

Proper wiring, especially for polarity if using DC, is essential for successful installation and to avoid any operational issues.

Can the SIEMENS QAM2120.200 be integrated with non-Siemens building management systems?

Yes, the sensor uses standard 0–10 V analog output signals, making it compatible with many third-party building automation and control systems.

This flexibility allows for integration into existing infrastructure without requiring proprietary hardware or software.

Consult your specific building management system's documentation for direct integration capabilities or to determine the need for an interface module.

What is the recommended installation location for optimal performance?

Install the sensor at breathing zone level, typically around 1.5 meters above the floor, in an area with good air circulation.

Avoid direct sunlight, heat sources, or areas with stagnant air, as these conditions can affect measurement accuracy.

Ensure the mounting location is free from obstructions and allows for easy access for any future maintenance or calibration.

What is the operating temperature range for this sensor?

The SIEMENS QAM2120.200 is designed to operate within a temperature range of 0 to 50°C. This ensures reliable performance in most indoor environments.

Operating the sensor outside these limits can lead to inaccurate readings or potential damage.

Always verify that the intended installation location falls within these operational parameters.

How is CO2 compensated in the sensor's readings?

The QAM2120.200 automatically compensates its CO2 measurements for variations in ambient temperature and humidity. This ensures more accurate readings in changing environmental conditions.

By accounting for these factors, the sensor provides a more reliable indication of actual CO2 concentrations.

This compensation is critical for applications where temperature and humidity fluctuate, ensuring the CO2 readings are not artificially skewed.

What does "High Range" signify for the SIEMENS QAM2120.200?

"High Range" indicates that the sensor can accurately measure CO2 concentrations up to 2000 ppm, which is a higher capacity than standard indoor air quality sensors.

This extended range is beneficial for applications where CO2 levels might exceed typical residential or office concentrations.

It makes the sensor suitable for densely occupied spaces or environments with significant CO2 generation.

What is the typical lifespan of the SIEMENS QAM2120.200 sensor?

While specific lifespan can vary based on operating conditions and maintenance, Siemens products are known for their robustness and long operational life.

Regular calibration and proper environmental conditions contribute to maximizing the sensor's longevity.

The sensor is built with quality components to ensure reliable performance over an extended period.

What troubleshooting steps can be taken if the sensor shows abnormal readings?

First, verify the power supply and all electrical connections are secure and correct. Check for any physical obstructions or contamination on the sensor element.

Review the operational environment to ensure it is within the specified temperature and humidity ranges. Consult the product manual for specific error codes or diagnostic information.

If issues persist, it may be necessary to recalibrate the sensor or consider replacement, especially if it has been in service for a long time or exposed to harsh conditions.