store.wirelesstag.net

These are the best bang for the buck. They can be adjusted with your own calibrated device so they are always reading accurate. Great battery life, get the pro if you can't hard line into an internet connection.

Easy to use, easy to set up, and flexible monitoring options. Very pleased with the WirelessTag system.

Fantastic product - allows monitoring of refrigeration, door status, water in bilge and state of shore power in a very economical solution. Excellent app interface

The wireless sensor tags work great. I especially like the information provided on the web/phone interface. I am using the sensor tags at my vacation homes to monitor the refrigerators and my plants to make sure the refrigerator is cold and the plant are geting watered.

One of the few temp/humidity sensors that integrates with SmartThings. iOS app is very nice. You can monitor your sensors and download the data. Very cost effective.