Home > Consumer Reviews > Honeywell TM005X Wireless Indoor/Outdoor Thermo-Hygrometer

This temperature and humidity measuring gadget is great. It comes with a second one that you can either install outside or somewhere else inside your house, and which reports on a different frequency channel to the main one. We were trying to verify that the humidity inside the house is correct in various places after running a large humidifier, and this gadget was exactly what we needed.

This item worked great for about 3 months. Then it lost the signal from the remote sender. Replacing the batteries and fiddling around with it did no good, now it will not even pick up the signal with the sender in the same room.

This combo thermometer and hygrometer is relatively good. The large display can be seen many feet away. Temperature seems fairly accurate when compared to its remote and 2 other termometers I have. But relative humidity is...well, relative. Internal reliability is poor with a 10% difference between the main unit and the remote. And both units were way apart from the other 2 hygrometers I've have (tho internal reliability with them is a problem too). But when it's dry, both register in the lower range and when it's wet both register in the higher range. But if humdity is important to you, look elsewhere.

The other complaint I have is that the unit can be paired with 2 other remote units but I have been unable to find out how or where to purchase another remote unit. However I still have to cycle thru blank displays remotes 2 & 3 before getting back to the main display on the primary unit.

I have purchases 60 to 100 of these Honeywell gauges in the past 6 months. The gauges are priced right but the accuracy is up to 6 percent off. Plus - minus 3 percent. Does not sound like much but if you have a customer that wants one master and two slaves and they read 6% different side by side it looks like the gauges are junk. As I said before the gauges are the best that I found.

The device seems to work well for both temperature and humidity. I have one remote sensor in a humidor. The other is in the bedroom. The differences in humidity in the 2 locations are as expected. Temperature readings are as expected. I have not independently assess accuracy but the humidor runs 65% humidity versus 40-60% in the bedroom. I toggle between the 2 locations with ease. I am planning to buy 2 more remote sensors; the device supports 3 sensors.