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Video: Installing A Temperature Sensor In A Walk-in Refrigerator Where Wireless Sensors Won't Work

Dec 03, 2010

Watch as we show you how to install Temperature@lert temperature sensors into walk-in refrigerators and freezers. Our temperature sensors serve as an early warning system so you can take action before your inventory is ruined and you lose business.


Video Transcript:

Hi I'm Harry Schechter with Temperature@lert and today we're going to show you how to install a temperature sensor into a walk in refrigerator.

The first thing you need to do is to drill a hole through the insulation outside of the refrigerator. Next thing you'll want to do is thread the sensor through and then around the hole, you'll want to take some of this HVAC duct putty and plug up the hole around the sensor so you prevent any air from leaking out.

The nice thing about the temperature sensors that we use is that they are wired back to the base station. Now, the base station itself can be wireless, but we like to use wired sensors for three reasons. One: They are more reliable. You can see that this entire refrigerator is encased in metal. That makes transmitting wireless sensor readings outside of it very difficult. Two: There are no batteries to change. So, it is low maintenance. And three: Typically with wireless sensors, you sample the temperature every hour. This is so your battery will last several years. With Temperature@lert, you can sample the temperature down to one minute. Let's see how it's done.

To install this in a walk in refrigerator or freezer, you'll need a drill, a long drill bit, the temperature sensor, and we recommend using some rope caulk to plug up the hole. Rope Caulk is nice b/c it's removeable in case you need to remove the sensor or replace it with an upgraded one that includes humidity. Rope caulk also prevents warm air from coming in and cold air from going out and helps maintain a steady temperature. Finally, you'll need your Temperature@lert base station. In this case, we have a wifi edition that we're using.

As you can see, the sensors are wired in to the wireless base station and they are reporting temperatures normally.

With the sensos installed, it's important to note that when the door opens, the air temperature is going to change. Just because the air temperature changes, doesn't mean the temperature of everything in this refrigerator has changed. So, you may need to play with the specific thresholds. The good news is when your fridge or freezer is full of lots of stuff, that thermal mass helps hold the temperature when the door is shut again. So, what we've done is we've placed the sensor far away from the door, and not in the line of any of the vents blowing cold air in.

Finally, when installing extremely temperature sensitive material, you can place the sensor in a small vial of food grade glycol. That's a food grade anti-freeze. And what that will do is it will buffer the temperature readings. If the air temperature changes rapidly from a door openting, the glycol will change much more slowly. Please contact us at and let us know if we can answer any questions or help you with your temperature sensors.

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