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Cisco Meraki Documentation

MT20 Datasheet - Open/Close Detection

MT20 Sensors 

Cloud-Managed Sensors that help you have complete visibility across your business environment.



Businesses need a complete view of data to make sound decisions. Businesses need to have visibility into their network availability metrics, capex & opex, and customer satisfaction levels to deliver on their mission. While businesses have a good grip on embracing and utilizing data in the business world, they are yet to fully visualize the physical world. 


Current solutions are complicated to install, do not scale and are difficult to use. Hence businesses do not have a simple and reliable way to have visibility into their critical assets to maximize their network uptimes, reduce equipment failure, reduce unnecessary site visits,  and deliver best-in-class customer service.


So, Meraki is introducing a range of sensors to prevent loss and increase operational efficiency with ease. Our sensors are simple, scalable and secure. Our sensors also connect to the dashboard using the MV/MR which removes the need for expensive gateways. Customers can now gain real-time visibility into their critical business environment form a  single pane of glass.


The Cisco Meraki MT20 sensor provides the capability to detect if a door is open or closed for network closets across industries using BLE (Bluetooth Low Energy) beacons on the MR and MV.


The sensor uses a Hall Effect sensor to detect the magnetic field and determine if a Door is open or closed.


Our sensors are built from the ground up to be easy to manage without compromising on power and flexibility


All Meraki sensors are managed through an elegant, intuitive cloud-based interface


Meraki’s centralized management gives administrators granular visibility into their network

Cloud management has a number of benefits that make it easier to build networks large and small: 


Automatic alerts based on customizable thresholds through SMS, Email and Mobile push notifications


Enterprise-grade security which the Cisco Trustworthy Systems seal of approval 


Role-based administration 


Firmware upgrades and enhancements from the Meraki cloud 


Zero-touch provisioning for rapid deployment across sites

Product Highlights 

  • Single pane of glass for all your networking needs (Camera, IoT, etc)

  • Always-on real-time visibility (24/7/365 visibility)

  • Flexible alert management 

  • Peel & Stick installation

  • Provision multiple sensors in minutes

  • Simple to set up reporting and configuration

Technical Specifications


Intrusion Detection Detects magnetic field via a Hall Effect Sensor

Wireless Capabilities

Bluetooth 4.2 Low Energy BLE Compatible MV smart cameras and MR access points
Operating Frequency 2.400–2.4835 GHz
IEEE Standard 802.15.1 (BLE 4.2)

Data Logging

Data polling frequency

Event Driven

Wake up every 20 minutes to report

Onboard data storage 4000 data points(~5 days of data in case of connectivity loss)
Security Secure BLE messaging using LTK(Long-Term Key)

Physical Characteristics

Dimensions Main Device: 81.2(L)X39.7(W)X19.5(H)mm;
Magnet Cover: 59.5(L)X12(W)X13.35(H) mm
Weight (excluding batteries) Main Device: 29;
Magnet Cover: 10g
Battery Compartment 1x AA Battery with up to 5 year battery life
Operating Environment

Temperature: 0°C - 55°C(32F - 131F)

Relative Humidity: 0 - 95% RH

Multicolor, multifunction status LED

General purpose button

Reset button

USB-C port

Warranty 3 Years

Ordering Information

Meraki MT Open/Close Detection MT20-HW and Magnet w/Cover
LIC-MT-XYR Meraki Things Enterprise License (X = 1, 3, 5, 7, 10 years)

In the Box

Unit MT20-HW
Guides QIGs
Battery 1 AA Batteries
Mounting equipment 3M tape (for main device), 3M tape (for magnet cover), 4 mounting screws (2 for main device, 2 for magnet cover), 4 drywall achors (2 for main device, 2 for magnet cover), torx allen wrench
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