4 Reasons Not to Put Your Data Logger in the Freezer

 
 
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Freezer Data Logger

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Industrial

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CLEVELAND - Feb. 3, 2020 - PRLog -- Reason #1

First, if you are using a wireless data logger that has WiFi, Bluetooth or other types of wireless radios, the metal enclosure of the freezer will drastically reduce the wireless signal. It's kind of like trying to use your cell phone in an elevator – sometimes it works, sometimes it doesn't. If the freezer has glass doors, the signal will probably get out. But if the cabinet and doors are metal, you will be relying on the signal to get out through the small gap around the door seal. Generally, this causes a very large decrease in the signal strength resulting in a very limited range or intermittent operation.

Reason #2

Another key reason is that the low temperatures in the freezer will dramatically reduce battery capacity. A common rule of thumb is that the capacity of a lithium cell, the type most commonly used in data loggers, will be reduced by 50% at a temperature of 0°F. Also, the internal resistance of the battery will increase at low temperatures, reducing the output voltage. Taken together, these can lead to frequent battery replacements. We had one customer that was using a very popular line of USB loggers that complained that the batteries were lasting less than a month. Then, we found out that they were putting the loggers directly in a freezer that was operating at 0°F.

Reason #3

If your device has an LCD and you need to read the data or alarm info from the display, it can be very difficult at low temperatures. Standard LCDs, which are used in most low-cost data loggers, are only designed to operate down to about 32°F. As the temperature decreases, the display will become very sluggish to respond and eventually it will not be able to update the data on the screen. Normally, this does not cause permanent damage to the display. Once it warms up it will operate normally, but we have seen cases where continued exposure to low temperature caused an LCD to fail.

Reason #4

Finally, there is always a risk of damage to the data logger from internal condensation when it is removed from the freezer. At some point, you will want to pull the device out of the freezer, usually to download stored data. Setting an ice-cold data logger on your desk can be like having a glass of ice water on a table on a warm day – if the dew point is more than the temperature of the logger coming out of the freezer, you are going to get condensation. And, we all know that moisture and electronic devices don't mix well!

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Tags:Freezer Data Logger
Industry:Industrial
Location:Cleveland - Ohio - United States
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