Can I use the MOCREO sensor in my refrigerator, freezer, or walk-in cooler? ==================================================================================== However, there are a few important things to keep in mind: 1. ST3/ST6 Sensors are not suitable for use in low-temperature environments such as refrigerators. - In fact, due to the specific structure of ST3/ST6 Sensors, they are not suitable for monitoring temperature inside refrigerators or other low-temperature environments. Prolonged deployment in low-temperature conditions can cause frost to accumulate on the surface of the Sensor's casing, potentially leading to hardware damage through the pre-existing holes in the casing. 2. MS2 is recommended for new refrigerator or freezer deployments. - For new purchases, use MS2 for refrigerator or freezer temperature monitoring. Keep the Sensor body outside the refrigerated space and place only the external probe inside. Existing ST4/ST5 owners may continue using their devices with the same deployment precautions. 3. ST10 Sensor is suitable for data monitoring in ultra-low temperature environments. - If you have a need for monitoring ultra-low temperature environments, we recommend using the ST10 Sensor. It is a low-temperature monitoring sensor that operates based on BLE wireless communication technology and can be deployed in ultra-low temperature environments with a minimum temperature of ≥ -328℉.