Dwyer Series CDTV

CO2 sensors are used to control ventilation systems and monitor indoor air quality. They can be stand-alone sensors or integrated into thermostats or air quality monitoring platforms.

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Dwyer Series CDTV

The CDTV is a carbon dioxide and temperature sensor with display that can be used for long-term monitoring and demand control ventilation.

Hub Highlights:

Basic display of CO2 value
Easily connected to any building automation system for monitoring or ventilation control
Good performance on Hub CO2 accuracy testing protocols
Includes temperature sensor and relay contact for alarm condition on CO2 value

Last Edited on: Sep 30, 2021

Model Number	Series CDTV
Sensor Type	Non-dispersive infrared (NDIR)/single-beam, dual-wavelength Manufacturer: Unknown
Power Input	19 to 28 VAC 6 to 35 VDC
Outputs	Range selectable within 0-10 VDC 0-20 mA Relay: SPST NO 2A @ 30 VDC
Altitude Correction Method	Programmable
Measurement Range	0-2,000 ppm or 0-5,000 ppm
Reported Accuracy	±(40 ppm + 3% of reading)
Display of C02 Value	On Device
Uses Automatic Background Calibration (ABC)	No

Last Edited on: Sep 30, 2021

Model	Series CDTV
Date of Test (including warm-up period if device uses automatic background calibration)	December 8,2020
Sample Size	10
Error of CO2 measurement @1100 ppm (average) (ppm)	28
Error of CO2 measurement @ 1100 ppm (standard deviation) (ppm)	105
Accuracy Metric	<±125ppm
Noise of CO2 measurement @1100 ppm (Average) (ppm)	15
CO2 Full results	See Box Plot
Operating Power for Sensor (watts)	1.00
Operating Power for Gateway (watts)	N/A
Operating Power for Sensor + Gateway (watts)	1.00
Operating Power Metric	<±1 W
Maximum Number of Sensors per Gateway	N/A

Last Edited on: Sep 30, 2021

Data Source: Staff at the UC Davis Western Cooling Efficiency Center

User Interface

Can the sensor display the CO2 level to occupants? If yes describe.

Yes - Display on the sensor

User Interface

Can the sensor display a visual indicator to occupants that the CO2 level has exceeded a programmed threshold? If yes, describe (what does the indicator look like, what the default thresholds are, and can the threshold be changed).

Reporting Capabilities

Can the sensor alert facilities (such as an email, text, or call phone application) when the CO2 level has exceeded a programmed threshold? If yes, describe (what does the indicator look like and can the threshold be changed).

Yes - Alerts can be generated when sensor is connected to a building automation system. Alert functionality is determined by building automation system manufacturer.

Reporting Capabilities, Integration Capabilities

How can the CO2 sensor data be logged? If proprietary software, describe (what type of account is needed, what logging intervals are available, what does it look like, and describe its capabilities including data download capabilities).

Logging data is dependent on functionality of BAS that sensor is connected to

Integration Capabilities

Can the CO2 sensor interface with a building automation system (BAS) or demand control ventilation (DCV) system controller? If yes, describe if integration capabilities are vendor specific.

Yes - any vendor

Integration Capabilities

If sensor can interface with a BAS or DCV system controller, is additional hardware required?

Installation

Does the sensor require specialized software for installation? If yes, describe

Installation

Does the sensor require specialized training for installation? If yes, describe

Operation

Does the sensor require on-going maintenance? If yes, describe

Operation

Does the sensor require service contracts for ongoing data access? If yes, describe

No - If sensor is connected to BAS, service contracts may be required for BAS functionality