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MT40 Smart Power Controller

Genuine Cisco Meraki Product
MT40 Smart Power Controller
From: £138.05 +VAT (£165.66 incl. VAT)

Meraki Sensor License (for MT Sensors)


Meraki SensorLicense 1-10Y

For Meraki MT Cloud-Managed Sensors

Experience the Benefits of Cloud Management


AC - USB-C Power Adapter – optional


USB-C power adapter for MT10 and MT12 sensors & MV2 camera




The Cisco Meraki MT40 smart power controller is the latest addition to the MT sensor portfolio. MT40, combined with the rest of the MT family, provides remote visibility into physical conditions and equipment status and power consumption to minimize unplanned downtime, extend equipment lifespan, and benchmark energy usage to quantify sustainability initiatives.
MT40, an inline power monitor, provides insight into power usage, intelligent alerting, and remote control of power status to improve sustainability, speed troubleshooting in remote deployments and streamline operations by enabling a more efficient response to power outages.

Smart sensors. Smarter businesses..

Meraki MT sensors accelerate deployment, simplify management, and provide data-driven business outcomes. Wire-free installation, flexible mounting options, and automatic pairing make it easy to provision thousands of sensors in a short amount of time. Centralized cloud management and open APIs enable MT sensors to be managed alongside other networked devices or integrated with any business system.

Product Highlights

• Inline power monitor • Downstream Power control • Single pane of glass for sensor monitoring combined with your existing Meraki dashboard • Always-on, real-time visibility (24/7/365 visibility) • Flexible alerts via email, SMS, mobile push notifications and Webhooks • Simple to set up reporting and configuration • Data mining APIs for custom development and integrations. • Multiple installation options • Provision multiple sensors in minutes


Additional information

Meraki Sensor License (for MT Sensors)

Licence length

1yr, 3yr, 5yr, 7yr, 10yr, No License Ordered, 1day (for per-device licensing model only)

AC - USB-C Power Adapter

Country for plug




Power Monitoring

  • RMS Voltage
    • Range: 250 V
    • Accuracy: +/- 1% V
  • RMS Current
    • Range:
      100-120VAC, 50-60Hz, 12A max
      200-240VAC, 50-60Hz, 10A max
      Accuracy: +/- 1% A
  • Real Power
    • Range: up to 2400 W
    • Accuracy: +/- 1% W
  • Apparent Power
    • Range: 0 – 250V
    • Accuracy: +/- 1% V
  • Power Factor
    • Range: 0 – 100%
    • Accuracy: +/- 1%
  • Energy
    • Range: up to 144 kWh
    • Accuracy: +/- 1%
Wireless capabilities
  • Bluetooth® Low Energy
    • 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 sampling
    • All metrics are polled at 15 seconds
    • Data reporting to gateway: 20 minute interval, threshold violation or on demand
  • Security
    • Secure BLE messaging using LTK (Long-Term Key)
Power Consumption
  • Typical: 1.2W (110V) – 1.6W (240V)
  • Maximum: 2W
Physical characteristics
  • Dimensions: Dimensions: 161mm (L) x 59.5mm (W) x 40.7mm (H)
  • Multicolor, multifunction status LED
  • General purpose button
  • Remote Control Lockout switch
  • Reset button
Operating environment
  • Temperature: 0°C – 50°C (0F – 122F)
  • Relative humidity: 0% to 95% RH


  • Three-year hardware warranty with advanced replacement
Ordering information
  • MT40-HW Meraki Smart Power Controller
    LIC-MT-XYR Meraki MT Enterprise License (X = 1, 3, 5)
  • Accessories
    • Power Cables (Sold Separately):
    • MA-PWR-C14-C15-1
    • MA-PWR-CORD-XX (Country specific)
  • Note: Each Meraki MT sensor requires a license to operate, however every dashboard organization comes standard with five free MT licenses to help get started.
In the box
  • MT40-HW
  • Quick-start and installation guide
  • One AA battery
  • Mounting equipment
    • Backplate
    • Velcro Strap
    • 2 mounting screws
    • 2 drywall anchors
    • C13 and C14 retention sleeves

In The Box

  • MT40-HW
  • Quick-start and installation guide
  • One AA battery
  • Mounting equipment
    • Backplate
    • Velcro Strap
    • 2 mounting screws
    • 2 drywall anchors
    • C13 and C14 retention sleeves



How does licensing work?

MT sensors require a dashboard license to operate, however, the licenses are not hardware-SKU specific. 

How does the free licensing work?

Similar to the free MV sense licenses, Meraki provides five free licenses for MT sensors to all new and existing organizations, and these licenses do not expire. Note that these licenses cannot be transferred to another organization in either co-term or PDL model.


How do MT sensors communicate with the Meraki dashboard?

MT sensors uses Bluetooth® Low Energy to communicate with Meraki IoT gateways. Supported IoT gateway devices are second-generation MVs and Wi-Fi 6 MRs. A full list of supported gateways is below.

MV2, MV12(W/NE), MV22(X), MV32, MV72(X) Wifi 5 Wave 2 APs – MR33, MR42, MR42E, MR52, MR53, MR53E, MR74 and MR84
Wifi 6 APs – MR36, MR36H, MR44, MR45, MR46, MR46E, MR55, MR56, MR76, MR86 

WARNING: Environmental sensors are only supported with second-generation MV cameras and compatible MR APs.

Do MT sensors support Wi-Fi 5 (802.11ac Wave 2) APs as gateway?

Yes. The MT functionality was ported to support Wi-Fi 5 APs as a gateway. The minimum firmware requirement for MT support on Wi-Fi 5 APs is MR 28.6+. Please refer to the list of compatible gateways for accurate and up-to-date information.

How does the sensor connect to its gateway?

As long as the minimum requirements are met as per the MT Installation Guides and the sensor is within range of the gateway, it will automatically connect to any gateway that picks up the Bluetooth Low Energy advertisement of the sensor.

What happens when MTs can’t communicate with the Meraki dashboard?

MT sensors have onboard storage that will retain approximately the last five days of data. Upon reconnecting to the Meraki dashboard, all data points will be uploaded.

Sampling rate and frequency of connections

In order to conserve battery life, MT sensors are in sleep mode the majority of the time. They wake up at a set regular interval to connect and report  data to the gateway, which in turn uploads it to the Meraki cloud. Below is the sampling rate and connections per device type:

MT10 Data sampling: 2 minutes
Connection interval: 20 minutes
MT11 (w/temperature probes)

Data sampling: 2 minutes
Connection interval: 20 minutes

MT12 Data sampling: event driven
Connection interval: 20 minutes
MT20 Data sampling: event driven
Connection interval: 20 minutes

All sensors will wake up immediately if a configured threshold has been violated or if any event occurs in binary sensors like MT12 or MT20.


What firmware on MV and MR is required for MT to work?


2nd Gen MVs – MV 4.8 +

MV2 – MV 4.17+

Wifi 5 APs – MR 28.5.1 +

Wifi 6 APs – MR 27.6 + 

Please refer to Managing Firmware Upgrades to schedule an upgrade.


How far can the MTs be placed from the MR/MV gateway?

MT sensors use Bluetooth Low Energy 4.2 to communicate with the gateway. Since Bluetooth Low Energy operates between 2.402 and 2.480 GHz, the range depends on the same principles as 2.4 GHz Wi-Fi. 

How many sensors can be used per gateway?

It is recommended to have a maximum of 32 sensors per gateway to ensure connection quality.

Minimum firmware requirement for a gateway to support 32 sensors:

MR – 28.5+

MV – 4.14+

Any firmware older than above only supports eight sensors per gateway.

Are MTs rated for outdoor use?

No, MT devices are designed for indoor use only. The MT12 is IPX5-rated (can resist a sustained, low-pressure water jet spray) and has a rubber liner to separate the power/battery compartment from being splashed or exposed to water. Still recommended NOT to submerge in water, as the rating states.

What are the supported temperature and humidity ranges for the MT10?

The temperature sensor supports 0°C – 55°C / 32°F – 131°F (accuracy: +/- 0.3°C) while using the included AA batteries. The humidity sensor ranges from 0-95%. That said, it is NOT an outdoor (IP67) or harsh environment-rated product. 

MT11 temperature probes supported range

Below are the specified temperature ranges of the MT11 temperature probes. Note that the operating temperature of the MT11 body is 0°C – 55°C / 32°F – 131°F.

Bare metal probe MA-CBL-TEMP-ME-1)
Range: -40°C – 55°C
-10°C – 55°C = +/- 0.5°C
-30°C – 55°C = +/- 1°C
-40°C – 55°C = +/- 2°C

Glycol probe (MA-CBL-TEMP-GL-1)
Range: -40°C – 55°C
-10°C – 55°C = +/- 0.5°C
-30°C – 55°C = +/- 1°C
-40°C – 55°C = +/- 2°C

Can MT10 be used to monitor temperature and humidity inside of a freezer?

The sensors are not IP rated and we do not recommend installing them inside of freezers.

Can the MT11 temperature probes be used to monitor temperature of fluids?

No. MT11 temperature probes are not rated to monitor temperature of any fluids, including water. 

Do the MT10/MT11 temperature sensors need to be calibrated?

No. The MT10 temperature sensor and the MT11 temperature probes use a digital sensor that comes pre-calibrated during the manufacturing process. This means no calibration is required during the product life cycle.

What part of the MT12 is capable of detecting water?

The full length of the cable can detect water as little as 3 mL. The included cable is 8 ft long, and can be extended to 16 ft with an optional second cable attachment.

How are the MT sensors powered?  

All MT products will come with AA batteries(Alkaline) included, and these batteries will last for about five years of powering the unit. That said, if you want a “permanent” powering solution, there will be a USB power adapter available at launch (MA-PWR-USB-XX) that can be used on the MT10 and MT12. The MT20 ONLY supports the battery operation. 

 Five years of battery life is projected based on the included 2.5V Alkaline batteries. Other types of batteries can be used, but the battery life may vary.

Alerting and Monitoring

What kinds of alerting does MT sensors support?

MT sensors support email, SMS, and Webhook alerts out of the box, no Twilio or similar integrations needed. It will also support push updates from the Meraki app. Please refer to the Sensor Alert Profiles article in order to set up alerting.

Do MT sensors support APIs?

Yes. Please visit Help > API docs on the Meraki dashboard for detailed documentation.

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