



🌡️ Stay ahead of the forecast—because your environment deserves precision.
The Oregon Scientific THGR-221 remote sensor offers reliable temperature and humidity monitoring with a broad measurement range (-20°C to +60°C, 25%-95% humidity). Operating on a 433 MHz wireless frequency, it transmits data up to 30 meters to compatible weather stations, including professional models. Lightweight and battery-powered (2 AAA included), it’s designed for easy setup and seamless integration, making it an essential tool for precise environmental tracking.






| ASIN | B07M5TK4F1 |
| Are batteries included? | Yes |
| Brand | Oregon Scientific |
| Colour | white |
| Connectivity Technology | 433 MHz |
| Connectivity technology | 433 MHz |
| Customer Reviews | 3.5 out of 5 stars 221 Reviews |
| Display Type | LCD |
| Finish Type | smooth |
| Frequency | 433 MHz |
| Global Trade Identification Number | 04891475388979 |
| Included Components | Batteries (2 x AAA) |
| Item Shape | rectangular prism |
| Item Weight | 120 Grams |
| Item height | 5 centimetres |
| Manufacturer | Oregon |
| Material | Metal, Plastic |
| Number of Batteries | 2 AA batteries required. (included) |
| Number of batteries | 2 AA batteries required. (included) |
| Power Source | Aa,Battery Powered |
| Power source | Aa, Battery Powered |
| Sensor Technology | Wireless (RF) |
| Special Features | Lightweight |
| Special feature | Lightweight |
| Style Name | Modern |
| Temperature Accuracy | 1 °C |
| Upper Temperature Rating | 6E+1 Degrees Celsius |
C**A
Poor accuracy.
Thought this was an accurate product at first. However after 12 months use it isn't accurate. Definitely reads around 3 or 4 degrees higher than it actually is. Can't recommend this product...
N**L
Great valve when I offer
I got this half price on offer direct from Smart Things (Oregon Scientific)’s Amazon Store. That’s great value. I note these are uglier, bulkier, lighter and look/feel way cheaper the the THGR810 they seem to replace. I am using these with RFXCOM (new pro firmware supports them, Domoticz and Homebridge so make great extra sensors. Way cheaper than buying HomeKit ones. I note only 3 channel but when using Domoticz doesn’t seem to matter as all use same frequency, they transmit a random unique identifier when powering up, so can’t see why any limit on non Oregon hardware, which itself of course needs the channel number to assign to its base stations.
G**M
Needs help.
Took a little while to get right. Base unit kept losing signal, till I read the instructions and noted that the sender had to face in the direction of the base unit. Never had one that had to do that before. Once sorted it works well, but still loses its connection now and then Unit not as well waterproofed as earlier models, mine is in a home made shelter, I am going to put additional protection in and see how it goes
R**S
Temperature and Humidity
I bought the to go with my Oregon Scientific BAR208HGX Wireless Weather Station And it works fine but I have had to reset it a few time.
F**T
OREGON WMR 200 Weather station replacement Temperature/Humidity sensor.
Bought this as a replacement for the standard temperature/humidity sensor for an Oregon WMR 200 weather station. Pressed "Search" to find new sensors on station, connected as soon as batteries inserted into THGR221. Seller would also refund if sensor didn't work on this station. Great price, great seller and fast delivery, what more could you ask for.
S**Y
Works ok
Display much smaller and hard to read than previous Oregon scientific remote sensors.
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