Installing CO2 Sensors

This guide gives instructions on how to install CO2 sensors so that they can report readings to the cloud. 

Quick access

1. What you need

2. Planning the installation

3. Activation

4. Mounting options

5. Calibration & Settling Period

6. Battery Replacement

What you need

Besides the CO2 sensor itself, it is advisable to have the following on hand:

• a laptop or a smartphone running the DT Studio web application studio.d21s.com. If your company does not have a DT Studio organization, get started at d21s.com/start
• we also recommend having one or more online Cloud Connectors (gateways) close by to enable forwarding sensor data to the DT Cloud and to check the connectivity of the sensor once it is installed
• an M6 wall screw and anchor, if you choose to not use the included adhesive. 

Planning the installation

For larger installations, please plan before starting. To accurately monitor the CO2 level on an office floor, we recommend using one CO2 sensor for each room up to 50 sqm (500 sqft). For larger rooms, like open-area office spaces, it depends on the number of people and the room's layout. LEED recommends that all areas with occupancy greater than or equal to 25 people per 90 sqm (1000 sqft) are monitored by a CO2 sensor.

CO2 sensors should be placed at least 1m (3ft) from doors, windows, air supply, air vents, or any other heating or cooling source that can affect the CO2, temperature, or humidity measurement.

Activation

Common practice is to activate the sensor before mounting it. Pull the battery tab to activate the sensor. Nearby online Cloud Connectors will automatically start to relay data from the sensor to the cloud service. The default update rate is 5 minutes. 

Claim the sensor in Studio by scanning the QR code found on the back of the device. The same code is printed on the packaging label. The sensor is now available in Studio and you can give it a name, e.g. “Main Meeting Room”.

Mounting options

CO2 sensors are designed to be wall mounted at approximately 1-1.8m (3-6 ft) above the floor (breathing height). Installing the sensor higher on the wall or in the ceiling can lead to measuring artificially low CO2 levels.

Upon unpacking, you will find the following items inside the box:

There are two mounting options available:

• Adhesive backing: Mount the sensor to a clean wall surface using the included adhesive backing.

• Screws: Remove the mounting plate by sliding it downwards and mount the bracket to the wall using a screw.

Calibration & Settling Period

After the installation and removal of the battery tab, the sensor needs 7 days to calibrate itself before the CO2 measurements are within the specification. CO2 levels might be artificially high within the first 7 days. 

Battery Replacement