Recently I got into HOME automation. I based my setup on Samsung's Smartthings Hub.
(great community out there for this product) I got one Sensor to add to my small freezer and while it was a pain to hook up the PRICE was Super Cheap compared to other sensors out there.. I does humidity pressure and temperature (plus it shows battery life) It takes a trick or 2 to get them engaged with the system but it works great when you do..
The Sensor sets comfortably inside the holder with plenty of space under it to not need to be taken out to replace a battery. There is a cut out to not press the button and a cutout to not cover the actual sensor. Also setup for a strap so it makes it easy to add a ribbon to it to allow you to hang it off the side of your top open freezer via magnets.. (WARNING NOT TO BE USED IN AN OVEN, GRILL, OR SMOKER WILL MELT WITH THOSE TEMPERATURES) Also makes it easy to mount outdoors.. (it has a small round sticker already installed on its back)