Mobeye ThermoGuard TwinLog CML4275 Temperature Monitor

Brand: Mobeye

 430,00 ( 355,37 excl. VAT)

In stock.

The Mobeye ThermoGuard TwinLog CML4275 is a highly accurate temperature monitor designed for use in outdoor and industrial settings. It records temperature data and transmits it to an online portal, where it can be visualised in both graph and table formats. Two temperature probes can be connected. The integrated communication module can connect to both the 4G LTE-M and 2G networks.

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Communication module

4G LTE-M, 2G Fallback


2x digital temperature input


1x open collector (200mA)

Temperature range

-35 to +70 degrees Celsius (sensor)

Power input

battery-operated (with option to connect 12VDC power source)


2x CR123 (lithium 3,0V) included, optional: battery pack (battery life 4 yrs)


130 x 180 x 35 mm



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Mobeye ThermoGuard TwinLog CML4275

The Mobeye ThermoGuard CML4275 is a reliable temperature monitor housed in a sturdy industrial enclosure. It notifies contacts in the event of temperatures being too high or too low. It records temperature data and transmits it to an online portal, where the temperature log can be visualised in both graph and table formats. The integrated communication module can connect to both 4G LTE-M and 2G networks.

Mobeye Internet Portal and AppThe Mobeye ThermoGuard TwinLog CML4275 is a highly accurate temperature monitor designed for use in outdoor and industrial settings. When the temperature deviates from the set limit values, an alarm message is generated. Furthermore, it logs temperature values at a user-specified interval and displays them in the online portal. The Mobeye CML4275 includes a reliable temperature sensor as well as the option for a second one. The device can operate completely on batteries or with external power.

If the temperature or one of the inputs indicates an alarm status, the Mobeye CML4275 sends an alert via the app (iOS/Android), telephone call (voice message), text message and/or email. The contact persons can be specified, and the alarm message can be customised.

Temperature Data Logger

When using the Mobeye Internet Portal, you can access the log functionality. The logged temperature values are sent to the portal on a regular basis and after an alarm, where they are displayed in table and graph form.

The Mobeye ThermoGuard TwinLog CML4275 can run for over a year on a single set of batteries. It also sends “power failure” notifications when using an external power source (12-24V DC or mains).

Key Features

  • Alarm notifications via app, telephone call, SMS and email
  • Temperature alarming and logging
  • Wireless, battery-operated
  • Power failure monitoring (if powered externally)
  • Two NO/NC alarm inputs, output, piezo siren
  • IP66 rated enclosure
  • Full insight into device when connected to the Internet Portal

Industrial Temperature Monitoring

The Mobeye ThermoGuard TwinLog CML4275 is a solid and compact unit for monitoring temperatures, in industrial, pharmaceutical, retail, and other professional environments.

The Mobeye ThermoGuard TwinLog can operate on batteries for a long time and is therefore independent of an external power source. If an external power source is available, it is recommended to connect it as the power supply will also be monitored. It also sends alarms for power failures. In the event of a fault, a message is sent. The batteries take over and the CML4275 continues to monitor and send alarm messages. A notification will be sent once power is restored.

Note: The delivery includes batteries but excludes a mains adapter. A suitable external power supply option is the country-specific Mobeye 500mA 12VDC adapter, which is available with EU, UK, and USA power socket configurations.

Night Frost Detector

In collaboration with horticulturists, we have integrated new features to operate as a night frost detector. During the chilly spring, when buds are just starting to emerge, growers receive precise temperature data for their fields. This data includes a critical zone and an alarm zone, thereby enhancing the importance of alarm notifications and ensuring timely updates to the graphs.

Smart Data Transfer Option of the CML4275

Throughout the flowering season, this detector, equipped with the Smart Data Transfer option, offers valuable insights into temperature values. When the external air enters the critical temperature zone, the logging and synchronisation frequencies are automatically increased. Once the warning limit is reached, an immediate telephone alert is activated, and the map is regularly updated. Additionally, an hour counter provides insights into both warm and cold hours.

Hour Meter with Cumulative Heat Hours

As an additional feature, the CML4275 includes an hour meter. This meter calculates the cumulative number of hours above or below a specified temperature value. You can configure both the time period and temperature limit within the Mobeye Internet Portal. A diagram will subsequently illustrate the cumulative progression of hours and the total number of hours during which the temperature exceeded (or fell below) the set limit.

How it WorksMobeye ThermoGuard TwinLog CML4275 Temperature Monitor

The Mobeye ThermoGuard TwinLog CML4275 continuously measures the temperature values and logs these periodically. In this way you are fully informed about alarm situations and the complete temperature trend.

  1. Place the sensor at a location with a stable temperature, in the shadow, or not too close to the cooling element or heat source.
  2. Set the temperature limits and log frequency and choose contacts for the notifications.
  3. If it gets too cold or too hot, the CML4275 sends alarm messages to the contacts. The logged values and trend can be viewed online in table and graph form.

Typical Applications for the Mobeye ThermoGuard TwinLog CML4275

The immediate alarm, scheduled logging, remote monitoring, and industrial IP66 enclosure render the CML4275 ideal for professional applications, including agriculture (heat alarms, heat hour tracking, and protection against night frost), as well as controlled storage.

Examples are:

  • medicine storage
  • industrial temperature monitoring
  • laboratory temperature monitoring
  • food storage
  • ingredients storage
  • distilleries
  • ICT server room
  • stores, e.g. grocery, convenience, drug store
  • agriculture
  • animal shelters
  • industrial processes


What is a Temperature Log?
A temperature log is a document in which information about temperatures is recorded. Typically, the log consists of temperature readings taken at regular intervals over a specified period of time.
What is a Temperature Data Logger?
A temperature data logger, also known as a temperature monitor, is a portable measurement instrument capable of autonomously recording temperature over a defined time period. The digital data can be retrieved, viewed, and evaluated once it has been recorded.




  • CML4275
  • 1x digital temperature sensor
  • 2x CR123 batteries
  • SIM card


(Alarm) messages

  • temperature alarm, input alarm, power failure, alarm recovery, battery low voltage, (missed) test report
  • to private contacts via app, call, text message and/or e-mail; local piezo siren


  • temperature value
  • status
  • setting list
  • event history
  • network strength
  • position based on Cell ID

Setting options

  • temperature limits per sensor (between -35 °C and +70 °C)
  • log interval (in min.)
  • interval for data synchronisation (in hours)
  • contact persons (unlimited number) for alarm and service messages
  • message texts
  • repeat cycles
  • input type
  • recovery messages
  • alarm delay times
  • test interval (keep-alive), etc.
  • option for “smart data transfer” for agrarians (night frost ) and counting “heat hours”


  • arming and disarming via button, time schedules and SMS

Temperature sensor

  • 1 meter cable
  • accuracy: 0.5°C between -30 °C and +55 °C, 1 °C outside these limits


  • 2x digital temperature input
  • 2x NO/NC input (potential-free)
  • 1x 12-24V DC (+/- 2V)


  • open collector (at external voltage), max. 200mA. Switches in the event of an alarm or after incoming SMS/call

Power supply

  • 2x CR123 lithium batteries or 12-24V DC (regulated) + 2x CR123 lithium

Battery lifetime

  • > 1 year at normal use (battery operated)
  • > 3 years at normal use (powered externally)


  • IP Code: IP66
  • Dimensions: 130 x 180 x 35 mm


  • 4G LTE-M (worldwide) + 2G EGSM Quad band
    The Mobeye SIM card and Internet Portal provide full functionality and optimum security. The 4G LTE-M network is very reliable and ensures a strong penetration against low energy consumption. 2G is available as a fallback.
  • 2G EGSM Quad band (850/900/1800/1900 MHz)
    When using your own SIM card, the device works (only) on 2G. The operation is “stand-alone”, without using the Mobeye Portal and without the log function. The alarm notifications are sent via SMS and telephone call to (max.) 5 contacts. Programming is done via (simple) SMS commands.

Accessories (not included)

  • 2nd temperature sensor (1m or 10m cable)
  • extension cable (3m, 10m or flat 1m cable)
  • 4 years battery pack
  • mains adapter
  • external antenna

Mobeye SIM, Portal & App service

The Mobeye Internet Portal offers a clear dashboard and essential functions, such as graphs and log values, history, “heat hours”, status and position (Cell-Id), online programming, setting up the messages and push notifications per app. The ‘keep-alive’ monitor offers extra security by monitoring the receipt of test messages. You can activate the supplied Mobeye SIM card online.


Click to open the documents and find more information:

SIM, Portal & App

All Mobeye monitoring devices require a SIM card for communication. The product comes with a budget-friendly SIM card, which provides direct access to the Mobeye Internet portal. Alternatively, you have the flexibility of using your own SIM card.

The Mobeye M2M SIM card provides the device with full functionality, allowing access to the Mobeye Internet Portal and App.

With the Mobeye SIM card, communication occurs over the 4G LTE-M network with 2G as a fallback. When you insert your own SIM card, the device utilises the 2G network. Alarm messages are then transmitted via SMS and/or call to a maximum of 5 telephone numbers.

The Mobeye SIM card is PIN-protected and exclusively functions in a Mobeye device. Please refrain from inserting it into another device. For further information about the Mobeye SIM card, visit: The rate for utilising the Mobeye Internet Portal and the SIM card can be found at

Free App for your Smartphone
The Mobeye Messages app is available for download from the Google Play (Android) and Apple App Stores (iOS).

Would you like to use the Mobeye SIM card, but it was not included in your package? Please contact the MobeyeStore team to request one by completing the contact form.


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