CM engineering IoT wireless sensor network platform
CM Engineering Co.,Ltd.

Application: Refrigerator temperature monitoring

Importance of food management

In recent years, refrigerator temperature monitoring has attracted attention from the perspective of food management.

Food manufacture and food distributor are required to accurately monitor the temperature of their refrigerators.
It takes some time and effort to manually measure the temperature.

Temperature monitoring using IoT

For this reason, there is an effort to remotely monitor the temperature of the refrigerator using IoT.

Sensor node is installed in the refrigerator to sense the temperature, and automatically monitor and manage the gateway wirelessly.

By introducing this system, it will be possible to significantly reduce the time and effort required for temperature control by the operator.

In the case of IoT, the following are required for temperature monitoring of many refrigerators.

  • Easy to install without wiring work
  • Long life with low power consumption
  • Can be confirmed remotely

Measure temperature of home refrigerator

Since the Tele-Sentient concept meets these requirements, we used the Tele-Sentient prototype we developed to monitor the temperature of our home refrigerators.

Since Tele-Sentient uses a specific low-power radio in the 920MHz band, long-distance wireless transmission is possible even if a sensor node is installed in the refrigerator.

In addition, by using the standby power shutdown technology, it is possible to operate with ultra-low power consumption in total, so you can expect long-term battery life with dry batteries.

Alkaline batteries, which are commonly used, are not suitable for installation in refrigerators under temperature conditions of 5 ° C to 45 ° C, so this time, we have selected AA lithium batteries that can be used in the temperature range of -40 ° C to 60 ° C.

Refrigerator temperature is not constant

Following is the result of monitoring the temperature of the home refrigerator.

You can also see that the temperature of the home refrigerator is not constant and fluctuates over the temperature range.

By utilizing IoT, it is possible to visualize information that was previously invisible.