RCHTSENSOR-2PK, Smart Room Sensor works with T9/T10 WIFI Smart Thermostats
€83
Price: $82.79
(as of Aug 19, 2025 02:08:06 UTC – Details)
Smart Room Sensor 2 pack.
- DO place about 5 ft. above the floor
- DO place on inside walls
- DON’T place behind furniture or doors
- DON’T place in direct sunlight
- DON’T place above air vents
Compatible with series 3 & Series 4 T9 Smart thermostats. Series number appears after model number on sticker on back of thermostat
DOUBLE THE COMFORT. Smart Room Sensors work with the T9 Smart Thermostat to sense temperature and humidity from multiple rooms.
WELCOME TO JUST RIGHT. Sense the temperatures in the rooms that matter. Focus on the rooms you choose by setting a schedule.
FOCUS ON THE ROOMS PEOPLE ARE IN. Let the sensors focus on rooms people are in, using motion detection. Stay cozy as you move room to room.
HELP EVERYONE SLEEP COMFORTABLY. Set your T9 to sense the temperature from the bedrooms at night, to keep those rooms the coolest and help everyone get a cozy night’s sleep.
SIMPLE INSTALL FOR A DIY PROJECT. Smart Room Sensors are easy to set up without any tools required. Use the Resideo app to connect.
CONTROL IT YOUR WAY. Control the T9 and Smart Room Sensors using the Resideo app to control your home anytime, anywhere.
MULTI-ROOM FOCUS. Focused on multiple rooms, the T9 will work towards creating an average temperature across the sensors. (T9 sold separately)
SENSORS THAT WORK WITH YOUR MOVEMENT. Motion detection that knows the difference between passing through a room or spending time there.
Customers say
Customers find the thermostat sensor effective at monitoring room temperatures and managing heating across the house. The device is easy to set up with clear prompts, and one customer notes it’s very portable. They appreciate its accuracy and motion response features, with one mentioning it can be set for either time or motion activation. The sensor’s durability receives mixed feedback, with one customer reporting it lasted over a year while another found it to be of poor quality.
13 reviews for RCHTSENSOR-2PK, Smart Room Sensor works with T9/T10 WIFI Smart Thermostats
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€83
Desmond Allen –
Great for creating an good average temp for your house
When you use this with the honeywell thermostat t9 it creates an average temp between the 3 when all selected. This also keeps the room your in just right. If your like me and have a warmer side of the house far from the ac this is for you. It also reacts to motion, sense humidity as well. Once you install give it at least a month and you can see your average temp on the app and customize or the app is ok not too bad. It’s very accurate if 70 was a normal temp for yiur house it may be around 74 now. Great item. My buddy dose ac installSaid this was the brand he used not the t9 thermostat now he’s looking to upgrade to this thermostat .
LaLa –
Room Sensors
Theses sensors measure air temperature and humidity and also have motion detection. Theyâre very easy to setup unless your thermostat is defective, which mines was. Fortunately, my installer returned and replaced my thermostat, but not after I spent many hours frustrated trying to figure it out on my own, and then a technician spent nearly two hours troubleshooting. I finally called customer service, and after being placed on a hold a few times, they determined it was defective. As a result, my installer came back and tried to troubleshoot again before finally installing a new thermostat.The sensors were immediately recognized and it took less than 10 minutes to add 4 sensors. I installed sensors in four rooms outside the room with the thermostat (living room), and I can easily check the temps for each room using the app, which is also very easy to setup.When set to active, the priority is the room with motion. The default is the room with the thermostat, when thereâs no motion and when set on âawayâ on the schedule. I work from home so prefer to prioritize the room Iâm actually in, especially since my office is usually warmer or colder than the rest of the house.The issue with my defective thermostat was getting an error that it could not enter enroll mode. There was zero guidance online, which is why Iâm mentioning it.Despite my initial frustration, Iâm glad I decided to keep trying and finally got it to work. These sensors have definitely help create a more consistent temperature throughout my home and always comfortable where I actually am, but it can result in the a/c or heater running longer to reach lower or higher temps seems temps can vary throughout the home.
TJ –
Great if they work
Only one worked out of the box. If it doesnât connect at first, donât wait to return it thinking you will figure it out later. You wonât. It either works right out of the gate or it doesnât. Love the system, sensors work great for managing temps across the house. Will be replacing these from somewhere local so I donât have to deal with returning broke ones again.
Shannon Quinlivan –
Great add on
Help balance temp across the levels of house
rkruz –
Easy Setup and Mount
The Honeywell Smart Room Sensor was easy to install on the T9 Thermostat.The onscreen instructions were clear and easy to follow.Initially the Remote Sensor temperature was high by 10 degrees and it had to sit overnight to eventually resolve to the correct temperature.The unit is small and easily taped to the wall.It has a motion sensor built in that can be used to sense if people are in the room and then automatically use that sensor to control the on/off for the HVAC.The webpage states the batteries should last one year but there are several reports in the reviews of very short lifetime. I have only had it for a few days but will update this review should the batteries need to be replaced prematurely.
nitin_malik –
Very useful for montoring room temperatures
My house has some rooms at the end of the duct line and after fitting theee I found out that some rooms are 2-3 degrees cooler or warmer than the temperature at the thermostat. Now I amAble to set the temperature better so get no more complaints of warm or cold rooms
DenSanAZ –
Use with the T9 Thermostat
These sensors are very straightforward and easy to understand. They are for use with the Honeywell T9 thermostat, very simple to place, pair, and name. They use 2 AAA batteries and are supposed to last one year minimum. Just follow the easy-to-follow prompts on the T9 setup display, pair only one sensor at a time, and they work accurately. They can be set for either time or motion activation. The only thing I question is the double-sided tape wall mounting…I had one fall from the wall, 5′ onto the tile floor, 20 min after placing it on a just-cleaned wall. I’d rather use a flat-headed screw for security. At $40, I’d hate to replace one because the tape didn’t hold!
GuruJon –
They work
I know these say Honeywell, but their thermostat division is now run by Residio. The sensors appear to work and the indicated temp and humidity seem to be within tolerance. I would have enjoyed something more precise but they get the job done. Tech support is challenging, but luckily I didn’t need much for the sensors. I paired these with the T9 thermostat and monitor three different living spaces now (four if you count the T9). The t9 itself has worked pretty well for me, with the exception of compatibility with some mesh WIFI networks. Otherwise, I’m fairly satisfied with the Honeywell/Resideo thermostat.
Amazon Customer –
Easy set up and install. Works well with T9 thermostat.
Stacy C. –
I bought this because I wanted to make sure my babyâs room was the right temperature. I can also prioritize the thermostat to his room with this sensor, making his room the perfect temperature every time. If you put the sensors in multiple rooms you can even set the thermostat to be based off the average of the two rooms. Itâs great! I want one in every room!Itâs also very easy to install, it comes with the 3M tape and is very sturdy. I havenât tried removing it yet but I donât think ill ever have to!
Luc Richard –
I have a 2,400 square feet house, living room is full south with big windows. There is a 15 feet hallway to front rooms, and the central heating (heat pump) thermostat is in the hall. So when it is sunny it get pretty warm and the heat gets to the thermostat. So in winter the furnace does not start even tough front rooms are cold. And in summer air-conditioning starts because so warm in back room, then it’s too cold in front rooms. I installed Honeywell T9 that came with one sensor and added these two for the front office, front bedroom and bathroom. Wow now it is comfortable all the time, this is simply great. and highly recommend
Pegi –
Sensors function as described however one of the sensors arrived looking a little roughed up with marks (I managed to clean them off) which is odd because I thought they were meant to be brand new products.
Tristan D –
Makes the best thermistat on the market even better. You can add these for different zones/rooms or add it as a differential between the thermostat and the sensor. Great stuff. Meshes well with google home too