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Cisco Meraki


What is MT15?

MT15 is our advanced air quality sensor that offers a CO2 sensor in addition to the metrics MT14 monitors: temperature, humidity, PM2.5, TVOC, and ambient noise. 

MT15 lays against the wall and has the ability to hide the power cables, to reduce the likelihood that people can tamper with it. MT15 can be deployed on both the ceiling and the wall.


How do I install MT15?

Information about recommended MT15 installation practices can be found in the MT15 installation Guide found here:


What metrics does MT15 sample? How often?

MT15 samples the following metrics:



Sample Period


30 seconds


30 seconds


30 seconds

PM2.5 mass concentration

1 second


3 seconds

Ambient noise

5 seconds


10 seconds


Do I still need a gateway if I use PoE?

Yes, the ethernet port on the device is for Power Only. MT15 uses the same gateway and communication architecture as the other MT sensors, more information can be found here:


Why isn’t my device connecting when using PoE?

The ethernet port on the MT15 is for Power Only. A gateway (MV or MR) is still required for the MT15 to communicate with Dashboard. For more information, view the MT Family FAQ:


How do I clean my MT15?

MT15 self cleans to ensure the build up of dust doesn’t affect its readings. In a particularly dusty environment, exterior cleaning can be performed with a microfiber cloth, especially around the vents and microphone (on the front of the device). Avoid using any cleaning chemicals/sprays in the process of wiping down the sensor. If you see any issues you believe could be in relation to the environment which the MT15 is deployed in, please contact support.


Does MT15 support high sampling mode?

MT15 is always in high sampling mode with all metrics visible.

Can I do vape detection with MT15?

Yes! MT15 supports vape detection the same as MT14 does. MT15 samples TVOC more frequently than MT14, which can result in a higher likelihood of picking up on vape events with more accurate detection rate. To enable the Default Potential Vape Alert Profile, add your MT15 to your network and the alert will automatically show up in your “Suggested Alerts” section of the Alert Profile Configuration page, as shown in the image below.

"Suggested Alerts" section of the alert profile configuration page

This section will only be visible if the ”Default Potential Vape Detection Alert” isn’t already configured. To activate the alert, click “edit”, select an MT15 to connect it to, add a recipient, and save the alert.

The Alert Conditions can be modified to fine-tune the thresholds at which alerts are sent:

Alert conditions screenshot.png

Values can be expressed numerically as micrograms per cubic metre of air (μg/m3) or as a qualitative score related to the ranges of TVOC or PM2.5 concentrations as noted within the graphs in the "Learn More" sections, as shown below:

TVOC score graph

PM2.5 score graph


If you delete the Default Potential Vape Detection Alert, it will revert back to the “Suggested Alerts” section.


Why isn’t my LED ring changing after I change the settings on the dashboard?

After changing the LED ring settings on Dashboard, it can take up to 20 minutes for this change to be reflected on the device. This is because your MT15 will need to check in with the gateway during the 20-minute interval in order to communicate the updated settings.

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