Vaisala GMW90D

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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Vaisala GMW90D

The GMW90 is a carbon dioxide, temperature, and humidity sensor that can be used for long-term monitoring and demand control ventilation. The humidity sensor is optional.

Hub Highlights:

Basic display of CO2 value, temperature, and humidity (optional)
Easily connected to any building automation system for monitoring or ventilation control. Both analog outputs and Modbus available
Excellent performance on Hub CO2 accuracy testing protocols
Includes temperature and humidity (optional) sensors and outputs

Last Edited on: Sep 30, 2021

Model Number	GMW90D
Sensor Type	Ir carbocap/ single-beam, dual-wavelength design Manufacturer: Vaisala
Power Input	24 VAC ± 20 % 18 - 35 VDC
Outputs	0-10 VDC 4-20 mA
Altitude Correction Method	Programmable
Measurement Range	0-2,000 ppm
Reported Accuracy	±(30 ppm + 3% of reading) (within operating temperatures 68-86°F)
Display of C02 Value	On Device
Uses Automatic Background Calibration (ABC)	No

Last Edited on: Sep 30, 2021

Model	GMW90D
Date of Test (including warm-up period if device uses automatic background calibration)	March 2, 2020
Sample Size	10
Error of CO2 measurement @1100 ppm (average) (ppm)	7
Error of CO2 measurement @ 1100 ppm (standard deviation) (ppm)	4
Accuracy Metric	<±75ppm
Noise of CO2 measurement @1100 ppm (Average) (ppm)	4
CO2 Full results	See Box Plot
Operating Power for Sensor (watts)	0.54
Operating Power for Gateway (watts)	N/A
Operating Power for Sensor + Gateway (watts)	0.54
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