Dwyer CDTV Carbon Dioxide/ VOC Transmitter

The Series CDTV Carbon Dioxide / Volatile Organic Compound (VOC) Transmitter reduces energy cost in buildings by lowering the amount of conditioned air based on the occupancy of the space. By detecting both CO2 and VOC, the transmitter can also detect fumes that may need to be exhausted during lower occupancy periods. Combining both measurements in one transmitter reduces both labor and material costs by only having to install one CDTV-VOC unit, instead of separate CO2 and VOC transmitters.

Carbon dioxide measurements are taken using our proven Single-Beam DualWavelength Non-Dispersive Infrared (NDIR) sensor. Our sensor allows users to get accurate measurements without waiting for the settling / correction periods of other logic based sensors. Transmitters can be used in buildings and applications that have 24 hour occupancy and can be calibrated on site to match environmental conditions for improved accuracy.

The VOC measurement is a single value derived from the presence of substances including alcohols, aldehydes, aliphatic hydrocarbons, amines, aromatic hydrocarbons, CO, CH4, LPG, ketones, and organic acids. Although a standard unit of measure is not currently defined, the VOC measurement unit “ppm CO2 equivalent” used by the device is commonly used in the industry. The VOC measurement does not actually measure CO2, but instead senses and indicates an air quality value that approximately correlates perceived comfort levels to similar concentrations of CO2 in the environment.

Single-beam dual-wavelength sensor advantages:

• Automatically corrects for aging effects in occupied and unoccupied buildings o Perfect for hospitals and manufacturing plants that are occupied 24 hours per day
• Measures actual unfiltered light intensity directly o Eliminates error from incorrect assumptions of gas concentration in theoretical logic assumption methods