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Sherry
Reviewed in the United States on March 20, 2025
I love this Wireless Temperature Data Loggerwhich is really convenient! Just press and hold for3 seconds to turn it on or off, and the indicator light flashes-super easy to use. The temperature measurement is accurate, with a wide range and stable data. The best part is its compact size, about the same as a card.
Doug in California
Reviewed in the United States on March 10, 2025
I'm a huge temperature nerd, and since we have quite a wine collection, I'm always trying to make sure the temperature is just right. That's why I log it throughout the day and night to keep the variance within the proper limits.The product page on Amazon does a great job explaining the setup. However, it doesn't mention where to find the app. No worries, though! I just searched "YFL" in the Apple App Store and found it right away. The unit itself is super tiny—honestly, barely bigger than a couple of postage stamps and about as thick as two credit cards.There's an "on" button on the back, and the instructions say to hold it for 2 seconds to power it up. At first, I couldn't get it to work and thought I might have gotten a dud. Turns out, I just needed to hold the button for 6 seconds instead. The green light flashed for a few seconds, and then we were off to the races!You simply open the app and scan the QR code on the sensor. After a few seconds, it integrates into the app and starts tracking the temperature.This sensor uses Bluetooth to send data. I've had no problem being about 40 feet away, even through a couple of walls, and still picking up the signal perfectly with my iPhone. Even if you happen to lose connection, it keeps logging data until you're back in range.I honestly can't believe how inexpensive this thing is. It's simple to use but works incredibly well. The app even shows the battery level; mine says I still have 179 days of battery left. Amazing!I highly recommend this sensor if you need to monitor and track anything sensitive to temperature or humidity.
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