Remote temperature monitoring

Full insight in the temperature trend and notifications in the event of deviations


Mobeye ThermoGuard TwinLog

The Mobeye ThermoGuard is a reliable and compact temperature monitor. In an alarm situation, it sends notifications via push message, call, SMS or e-mail. It also logs the temperature values and sends them to an online portal for visualisation as a graph, gauge or table.

Monitors the ambient temperature and reports on exceeding or falling below the set limits.

Complete and user friendly temperature monitor with alarm and log functions. For reliable monitoring of the ambient temperature. You can prevent temperature damage by timely intervention in the event of deviations.

This product is the successor of the Mobeye CML2255.

Temperature measurement and logging

The temperature sensor is digital and extremely accurate. The minimum and/or maximum temperature limit is adjustable between -35 °C and +70 °C. The sensor is factory calibrated and indicates the value in decimal. One sensor is included in the standard product. A second sensor can be attached, which is available as accessory.
The interval for logging the values and transfer to the portal are adjustable.

Alarm messages

In the event of an alarm, the Mobeye ThermoGuard TwinLog sends alarm notifications by app (IOS/Android), telephone call (voice message), text message and/or e-mail. The message includes the actual temperature. For the push messages there is a choice between an escalation plan or group message. With the escalation plan, the recipient can confirm the push message, so that the other contacts no longer receive the message. If none of the recipients confirms the push message, a phone call is made. The number of contacts is unlimited.

External voltage vs battery powered

The Mobeye ThermoGuard TwinLog can run on batteries for a long time which makes it independent of an external power source. If an external power source is available, it is recommended to connect it. The availabiltity of the power supply is then monitored. it will also send power failure alarms. If there is outage, a notification follows. The batteries take over and the CML4255 will continue to monitor and send alarm messages. Once the power restores a notification will be sent. The batteries are included in the standard product. A country-specific mains adapter is available as accessory.

Alarm inputs, piezo siren and open collector output

In addition to the temperature sensor, the Mobeye ThermoGuard (CML4255) has two NO/NC inputs for connecting alarm contacts and sensors. These can be used for monitoring the status of a make/break sensor or device, such as an air conditioner or door magnet. In the event of an alarm an audible alarm indication can sound by the internal piezo siren. In addition to this an (open collector) output is available to switch an external device.

Network and SIM card

The Mobeye SIM card gives the device full functionality, including the use of the Mobeye Internet Portal and the app. With the Mobeye SIM card, communication takes place over the 4G LTE-M network with 2G as fallback. It then provides the log function. The temperature trend and status are displayed in the portal.
When you insert your own SIM card, the device works on 2G. Logging is not possible, alarm messages are then sent via SMS and/or call to max. 5 telephone numbers.

Mobeye CML4255
  • Medical fridges
  • Medical freezers
  • Cold storage
  • Powder storage
  • Dyeing and drying
  • ICT server rooms
  • Animal shelter

Reliable and understandable

  • Alarm via app, call, SMS and e-mail
  • Temperature alarming
  • Complete temperature trend in a graph
  • Power failure monitoring (if powered externally)
  • Two NO/NC alarm inputs
  • Siren
  • Full insight into device when connected to Mobeye Internet Portal


Mobeye ThermoGuard TwinLog

Summary of features


  • temperature alarm
  • graphical display of the temperature trend in online portal
  • power failure monitoring
  • 2x alarm input (NO/NC)
  • second temperature sensor possible


  • to private contacts via an app, call, SMS and/or email


  • temperature alarm (incl. value)
  • power outage and power recovery
  • input alarm, (optional) alarm reset
  • battery low voltage, (missed) test message

Other settings

  • alarm limits between -35 °C and +70 °C
  • log interval 2 … 9999 minutes
  • transfer interval to portal 1 … 999 hours
  • delay time on temperature, input and power failure alarm
  • alarm repeat interval
  • inputs adjustable as NO or NC
  • silent or audible siren
  • identification text, alarm texts
  • calibration value
  • automatic switch-on and switch-off times

Mobeye SIM card (option)

  • online activation
  • gives access to Mobeye Internet Portal and App
  • communication via 4G LTE-M and 2G Quadband EGSM
  • low-cost, flat-fee, multi-provider

Mobeye Internet Portal and App
(when using Mobeye SIM card)

  • alarm per push messages/SMS/call/email/ARC
  • push messages as group message or sequential
  • log values as graph, gauge or table (and download)
  • status display
  • online programming
  • keep-alive monitoring
  • position display (Cell-ID)

Own SIM card (option)

  • alarm notifications via SMS text message and call to max. 5 contacts
  • communication via 2G Quadband EGSM


  • 94 x 94 x 28 mm

Power supply

  • 12-24V DC + 2x CR123, or
  • 2x CR123

Battery life

  • 1 year (if battery-operated)
  • 3 years (external power)

Communication module

  • 4G LTE-M (WW) + 2G Quadband EGSM 850/900/1800/1900 MHz


  • CML4255
  • 1x temperature sensor
  • 2x CR123 batteries
  • Mobeye SIM card (optional use)

Accessories (not included)

  • second temperature sensor (1m or 10m), mains adapter, extension cable (1m flat, 3m round, 10m round), external antenna