Pelican TC-4

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.

Learn More

Technology Basics Application Guidance Energy & Cost Impacts

If you are experiencing issues with the comparison tool, please disable your adblocker.

Pelican TC-4

Thermostat with integrated CO2 sensor for long term monitoring and demand control ventilation.

Hub Highlights:

CO2 value displayed on device. Graph of CO2 values over time available on cloud-based interface and mobile app for authorized users.
Connects to Pelican building automation system.
Poor performance on Hub CO2 accuracy testing protocols.
Includes CO2, temperature, and humidity sensors.

Last Edited on: 9/19/2025

Sensor Type	Non-dispersive infrared (NDIR) Manufacturer: Winsen
Power Input	24 VAC
Outputs	Wifi to cloud-based interface (requires gateway)
Altitude Correction Method	Unknown
Measurement Range	400-2,000 ppm
Reported Accuracy	±50 ppm
CO2 Display	On device, web, and mobile app (account required)
Uses Automatic Background Calibration (ABC)	Yes

Date of Test (including warm-up period if device uses automatic background calibration)	September 3-18, 2025
Sample Size	4
Error of CO2 measurement @1100 ppm (average) (ppm)	-210
Error of CO2 measurement @ 1100 ppm (standard deviation) (ppm)	22
Accuracy Category	greater than ±175ppm
Noise of CO2 measurement @1100 ppm (Average) (ppm)	6
CO2 Full results	Set Box Plot
Operating Power for Sensor (watts)	0.71
Operating Power for Gateway (watts)	1.43
Operating Power for Sensor + Gateway (watts)	0.72
Operating Power Category	less than ±1 W
Maximum Number of Sensors per Gateway	2000

Data Collection

Sample Size

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

User interface

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

Yes - Sensor displays live CO2 readings on e-ink screen, but users must click through two screens to see the reading. Historical CO2 data is displayed graphically on the Pelican web interface and mobile app, account required.

User interface

2. 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

3. 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 - Email and text alerts can be configured on webpage. Alert threshold can be changed.

Integration capabilities

4. 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 - Pelican BAS and Pelican Pearl DCV controller only

Integration capabilities

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

Yes - Pelican Pearl economizer controller needed for DCV.

Reporting capabilities, Integration capabilities

6. 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).

Data logged every 3-4 minutes and displayed graphically on webpage. No data download capabilities are available.

Installation

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

Yes - Requires proprietary webpage or mobile app.

Installation

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

Operation

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

Operation

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

Miscellaneous

11. Are there any other notes about the user experience?

CO2 display on device is not on main menu screen. Users navigate through two pages on device screen to see CO2 reading.