nGuage Bluetooth Fridge Temperature Sensor

Fridge/Freezer Temperature Sensor

Monitor the temperature of your fridge OR freezer with our Bluetooth Temperature Sensor. Buy 2 to monitor both compartments. Can also be used for general ambient temperature monitoring. Set out of limit alarms when temperature is above or below thresholds.

We have two models to choose from based on your accuracy requirements.



This is our new variant that is aimed for users who are only interested in knowing what the relative temperature of the fridge is doing.

There are many variables when measuring fridge temperature. The bottom side of the fridge might be a lot colder than the top. And if you place the sensor close to a cooling plate at the bottom, it might give you a colder reading than lets say if you were to mount the sensor at the top of your fridge. With this in mind, most users only require the relative temperature and are not concerned about getting an exact scientific measurement. This unit is not factory calibrated so please expect a margin of error.



  • Temperature Measurement Range: -20°C to 55°C
  • Dimensions: 57.8 x 40.6 x 17.5mm
  • Internal ON/OFF push button
  • Weight: 25g
  • Colour: Black
  • Battery: CR2477, 1pc, replaceable
  • Battery Lifetime: 1000mAh, +-3 years
  • Range (open space): 100m
  • Waterproof: IP67
  • +-3.0°C accuracy.

*note to existing customers, this Standard model looks similar to our original temperature sensor, but there is a hardware difference between them.



Our Plus model is for users who require a more accurate temperature reading with a factory calibrated sensor and accuracy of +-0.2°C  Additionally, the Plus version has an IP68 waterproof rating and can be used in temperatures of -40℃~85℃. 


  • Temperature Measurement Range: -40°C to 85°C
  • Dimensions: 47.6 x 69.6 x 24mm
  • Internal Magnetic Switch
  • Weight: 52.2g
  • Colour: Black
  • Battery: 1/2AA, 1pc, replaceable
  • Battery Lifetime: 1200mAh, +-3 years
  • Range (open space): 70m
  • Waterproof: IP68, IK09
  • +-0.2°C accuracy.


iOS / iPhone users, please note, should you wish to use the nGauge 4x4 App while it is minimized (running in background), our Gateway is required.


Temperature Accuracy:

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