Approved for use by the North Carolina Department of Health


Cellular Refrigerator/Freezer Guard

  • Monitor the temperature in up to eight refrigerators, freezers, coolers, or rooms with .1° resolution

  • Monitor local temperature and humidity with optional built in sensor

  • 4 dry contact inputs

  • Low battery warning

  • On board memory stores up to 6 months of temperature readings

  • Access temperature readings via web browser

  • Receive alarm texts directly from the CM705E

  • Select model for AT&T, T-Mobile, or Verizon network

  • Low cost cellular plan available or supply your own

  • Free technical support

  • Two year warranty

Apps available for Android and iOS

The CM705E is available for the T-Mobile, Verizon, and AT&T carriers.

In addition the CM705E can connect to your network via Wired or Wireless.

Select the carrier and network you will be using and click the appropriate button.

Please feel free to call or email us for assistance in selecting the best model.

Wireless Ethernet

CM705E for T-Mobile Network: $825

(includes one year of service)

CM705E for Verizon Network: $700

(requires Verizon service)

CM705E for AT&T Network: $700

(requires AT&T service)


Select one of the optional two-year calibration certificates

Optional ILAC Calibration Certificate: $195

Optional NIST Certificate: $35

ILAC (International Laboratory Accreditation Cooperation) adds 9 working days to shipping date

NIST: National Institute Standards and Technology

Available Options

Ambient temperature and humidity sensor: $45

Alarm relay output: $20

Wired Ethernet


You need to know immediately if the valuable product stored in your refrigerator or freezer is going to spoil due to an equipment failure or a power outage that knocked out your cooler and office network.

The CM705E will come to the rescue and immediately notify you via a text message sent directly to your phone.  Text message will be sent even during a power outage as long as the cellular network is available.




  • Monitor up to 8 refrigerators, freezers, blanket warmers, room, etc with one unit.

  • Optional built-in temperature and humidity sensor to monitor local conditions.

  • Monitor 4 dry contact inputs/water sensors.

  • Rechargeable battery backup lasts up to 12 hours.

  • Continuous on-board temperature recording and logging can store up to 6 monthss worth of temperature data.

  • Programmable high and low temperature alarm limits for each refrigerator/freezer/cooler.

  • Programmable alarm time delay for each sensor.

  • Simple field calibration of all temperature and humidity sensors.

  • LCD displays real time data.

  • Includes our free Data Capture software.

  • NIST traceable certificates are available for the unit and temperature sensors.

  • Wide temperature monitoring range: -328°F to 392°F.


  • Maximum temperature sensor range: -328°F to 392°F, -200°C to 200°C

  • Factory calibrated range -148°F to 78°F (-100°C to 25°C) to less than 1 degree

  • Field calibration can be performed at one point

  • Measurement resolution 0.1°

  • Sensor Type: 1000 Ohm Platinum (.00385 TCR)

  • Low battery warning

  • Optional 0.5a 125vac alarm relay output

  • Internal alarm buzzer: (85dB)

  • Rechargeable battery backup included

  • Plug-in power supply, telephone extension and Ethernet cable included

  • Operating temperature range 32°F to 125°F

  • Enclosure Dimensions: 5.0" x 7.5" x 1.75" (W x L x H) Keyhole mounting holes 10cm on center



Microtechnologies, Inc.
Farmington, CT 06032

Sales & Support

© 2019 By Temperature Guard

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