GMM112 Carbon Dioxide Module for HVAC Applications
The Vaisala CARBOCAP® Carbon Dioxide Module GMM112 is a compact module for measuring ppm (parts per million) levels of carbon dioxide. The GMM112 module is designed for indoor use in demand controlled ventilation and other applications requiring carbon dioxide control.
- Compact OEM module for demand-controlled ventilation and other CO2 measurement applications
- Incorporates the Vaisala CARBOCAP® Sensor – the silicon-based NDIR sensor with unique internal referencing
- Advanced, single-beam, dual wavelength measurement with no moving parts
- Excellent long-term stability
Proven Performance with the Vaisala CARBOCAP® Sensor The GMM112 module includes Vaisala CARBOCAP® carbon dioxide sensor, a silicon-based infrared (IR) absorption sensor. The excellent long-term stability of the CARBOCAP® sensor results from its unique measurement technology. The sensor features an electrically tunable Fabry-Perot Interferometer for built-in reference measurement. The sensor not only measures CO2 absorption but also a reference, which makes it possible to compensate for potential light intensity variations and contamination and dirt accumulation in the optical path, making the sensor extremely stable over time. CARBOCAP sensor has no need for any compensation algorithms that are used in more simple sensors to compensate for their drift. In applications with constant elevated levels of carbon dioxide and in buildings with around-theclock occupancy (e.g. hospitals, manufacturing facilities, residential buildings, and retirement homes) the compensations based on assumed background carbon dioxide level simply do not work.