La Crosse Technology TX29U-IT 915 MHz Wireless Temperature Sensor

Perfect. Still functioning in all weather

First off, heed the warnings from the manufacturer: don't put these in locations where they can get heavily rained on, and don't put them in direct sunlight.I purchased this sensor as an add-on to a LaCrosse Weather Station so I can monitor an additional location. I've had it for a number of months now. This sensor is located in the backyard, attached to a deck underneath an overhang so it doesn't get too wet.I live in a part of the country where the winters are long and harsh. We've had temperatures below freezing for almost two months straight now, with a low of -15F so far this season, and this sensor is still working. If it makes it through May (the end of our winter) I'll be surprised. I'll post an update if I have any problems!UPDATE: Sept 28, 2009 (9 months after original review above): This sensor lasted all winter and summer, despite having snow accumulate on the top during the winter and lows of -15F and winds of 80mph... amazing. Keeping my fingers crossed that I'll have as good of luck this winter too!UPDATE 2: April 24, 2010 (16 months after original review): Sensor still going strong, and still using the original battery! Made it through another long and harsh winter. For the price and considering the weather this sensor has endured, it is an AMAZING value. If I wish to replace the indoor weather station in the future, I will definitely look for one that is compatible with these sensors.UPDATE 3: November 17, 2010 (23 months after original review): I almost feel ridiculous coming back here to update on this product again, but this thing is still working. I just don't understand it! I noticed that the top sometimes has snow on top of it (yes, we just got 20" over the past week), so it isn't as well-protected from the elements as I originally thought... yet it is still working and still accurate! I can't believe that I am gushing over a $15 temperature sensor LOLUPDATE 4: January 28, 2011 (25 months after original review): Well, the batteries in one sensor finally died last month. I replaced the batteries (old and new ones are Duracell Ultras) in both sensors and everything is working great again. On a side note: we had temperatures of -20F over New Year's weekend with wind chills of -51F (its ridiculous and true). Guess what? Outdoor sensor worked fine and was within 1-2 degrees of actual temperatures registered by others in the area using their much more expensive equipment. :)UPDATE 5: December 14, 2011 (3 years after original review): They're still going strong!UPDATE 6: February 1, 2013 (4+ years after original review): Both are still working and still accurate!UPDATE 7: October 12, 2014 (almost 6 years after original review): Someone commented on the review and it made me realize I should update. They're still working fine. I consider this luck at this point. :)

I think I get about four years life out of these, looking at service history. I keep the sender in plastic ziplock bag near the bottom of a very pretty Norway spruce about 20' from where the receiver/display is mounted. First one lived in the eaves outside the door. mounted per instructions. It was getting sun on the others side of the facia board, and was reading higher than actual as a result. When that one gave up after three or four years (annual battery replacement...), I decided to put the next one out in the tree where it would be always in the shade and have free airflow. It went into the bag, thinking that maybe the weather (rain & snow) would bother it if I left it exposed in there. The readings were more reliable without the sun loading, but life was no different even completely moisture protected. Now on number three (second replacement) and I'm resigned to having to get a new one in that same while.I like the display unit, consider the sensor as a consumable at this point.If you have a good display unit that you like, replacing a failing sensor seems like a practical solution. Certainly better than scrapping the whole package for new, if you really just need the sensor.

Good quality at a fair price.They work as advertised.Very accurate and reliable.I use them in my greenhouse, with the receiver/base sitting in our kitchen.The Greenhouse sensors are approximately 75’-85’ from the receiver/base.

This wireless temperature sensor works extremely well and is easyto set up - but you absolutely must follow the directions exactly.Range is excellent - but just make sure that some large object suchas a metal shed or a large oak tree is not in line-of-sight betweenany of the transmitters and the receiver.I am using 3 of these temp sensors with the 915 MHz receiver. Onesensor came with the receiver, and I just purchased two more, since thereceiver can display up to three different temperatures from threesensors. However be advised that if you carry one or more of thesesensors out of range and the receiver loses track of it, you absolutelymust take the batteries out of all three sensors and out of thereceiver and re-initialize all of them. This is not a difficult step,since I did it several times while playing around with the sensors tosee how much range they had - which resulted in the receiver losingtrack of one of them.When you first see the instruction booklet that comes with the receiver,it looks daunting, but not to worry, since only a tiny part of it is inEnglish, with all the rest in other languages. Once the temp sensors areinitialized, then it takes only a few seconds to set the clock.I read in other reviews that some buyers had problems getting theirreceiver to respond to some sensors, but that is because the buyers failedto properly re-initialize their units. Also be advised that if you buya display unit that receives transmissions at 915 MHz, then you absolutelymust buy sensors that also transmit at 915 MHz. Several of the sensorsthat are sold by Amazon look alike, but not all of them use 915 MHz, socarefully read the tech specs to make sure that both the transmitter andthe receiver operate at 915 MHz.