Watch 4 spaces at once — three remote sensors, ±0.5°F/±2% RH accuracy, and a 500ft range for home, nursery, basement, wine cellar, incubator, and greenhouse.
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WHO IT'S BEST FOR
Best For:
For the homeowner who wants to monitor four areas right out of the box: The TempAir PLUS TP220B comes with 3 sensors included. Living room, backyard, garage, and basement all covered from day one at 500ft. No hunting for compatible sensors, no extra purchases needed.
For the gardener or property owner who tracks multiple outdoor zones simultaneously: Three weatherproof outdoor sensors monitor different areas at the same time. Greenhouse, front yard, and side garden are all visible on one display. Spot which zone ran too hot or too humid overnight.
For anyone who wants a complete multi-sensor setup without piecing it together: Everything in the box: base station plus 3 sensors, pre-synced and ready immediately. The most complete out-of-box indoor/outdoor monitoring solution in the lineup at $39.99.
Not Ideal For:
Those who want more range across a larger property: For a large yard, outbuilding, or multi-floor home, the TP260B doubles the range to 1000ft with stronger signal penetration.
It monitors both temperature and humidity, indoors and outdoors, and comes with 3 remote sensors in the box, pre-paired out of the box. That lets you track up to 4 locations at once on one display, for example your living room, greenhouse, nursery, and outside. Each sensor sits on its own channel, so the readings never get mixed up.
The remote sensors transmit up to 500 ft (150 m) in open space over their own RF signal, with no app, Wi-Fi, or hub needed. Walls, metal, and distance can shorten real-world range.
The TP220B reads temperature to within ±0.5°F and humidity to within ±2-3%RH. It also logs max/min records and shows trend arrows, so you can see whether conditions are rising or falling.
The base station reads indoor temperature from about -4°F to 140°F , and the remote sensors read outdoor temperature down to roughly -40°F and up to 158°F. Humidity range is 10% to 99% RH on every channel.
Yes. The remote sensors are rainproof and built for outdoor placement. For the most accurate readings and the longest life, mount them out of direct rain and direct sun, such as under an eave or on a shaded wall.
Yes, batteries are included. The TP220B runs on 8 AAA batteries total (2 for the base station and 2 for each of the 3 sensors), and it arrives pre-paired, so you just insert the batteries and start monitoring.
The TempPro TP220B is the best all-in-one wireless thermometer hygrometer bundle for users who want to monitor 4 locations simultaneously right out of the box with no extra purchases needed. Coming with 3 remote sensors already included, it provides a 500ft wireless range with ±0.5°F temperature accuracy and ±2-3% RH humidity accuracy across the base station and all three sensors, giving you professional-grade whole-home coverage from day one.
This makes the TP220B the ideal choice for homeowners, property managers, and serious gardeners who want to set up comprehensive indoor and outdoor climate monitoring in one go, covering the living room, greenhouse, basement, and garden simultaneously. Customizable alerts notify you when temperature or humidity exceeds your preset thresholds, so you can respond immediately to changes that matter.
With waterproof outdoor sensors, a large backlit display, and flexible placement options, the TP220B is the most complete and ready-to-use wireless indoor outdoor thermometer hygrometer in the TempPro lineup for anyone who wants full multi-zone coverage without the hassle of buying sensors separately.
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5 stars: 6 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)
C
Chad
Easy to use and helps monitor different locations.
J
Jeff Hendrix
It's nice to know what the temperature is in my out buildings, this unit works great.
S
Steve in SW Florida
First thing. I absolutely love TempPro products. They are very accurate in giving me a temperatures. This unit I use at Home the base unit sits on my desk where I can see the read easily. Then I have one remote senser in my wife's office one outside and one in a refrigerator where I keep my medicine.
B
BT
These work great! I put one in my basement and one in my balcony. The basement transmits an accurate signal through my concrete block walls. The balcony is right on the mark too. I placed a third in the room with the thermostat and it reads identicle to the thermostat. I wish I had found thse earlier.
G
Gale Jenness
Really nice product, put the batteries in the base unit and the 3 sensors . They all sync by themselves and worked flawlessly! Just haven’t had a chance yet to put the sensors out in my different chickens, duck, and geese coops yet and that will test that 500 ft range? If I don’t update this review consider the sensors work connecting to the base from a long distance away from each other! I will be very impressed if they work connecting to the base from across my 5 acres of property! From my home to my coop farthest away around 320 ft and will be going thru 2 wooden walls. That product looks to be extremely well madeshould be a good test on its distance for connecting to the base unit? This product looks to be extremely well made, I especially like how the battery covers/lids on the sensor are designed. Easier to open / close than other battery covers /lids. Looks like they went the extra mile on everything with this product!Update 2-2-2026 Have the sensors all installed in my coops and my coop farthest away from my home is around 225 ft from my house. The base unit is in the middle of my house in our main hallway to our bedrooms and laundry room. So this sensor is connecting thru 2 walls plus 225 ft like the sensor and base unit are sitting right next to each other! Everything works perfectly, no problems whatsoever I couldn’t be more impressed or happier with this temperature guage and it’s 3 sensors! Now I can keep track of the temps in my 3 coops as well as the moisture/dampness in the coops as well! Only thing that I wish been different is the color of the base unit I would have preferred black that would have matched my furnace smart thermostat that also reads the temperature in my home’s hallway. But that’s a minor issue I will ignore. I didn’t buy this for its color, I bought it for its quality and performance abilities and I haven’t been disappointed at all!
A
Amazon Customer
All temp probes align when tested side by side. Readout is clear. Able to get signal from a couple rooms away, through walls, and from outside in 0* F temps. Only had this for a a few weeks but seems to be delivering as advertised. Time will tell from there. Good overall product. Wish the sensor mounting screws were a through hole screw for simplicity of mounting but not an issue.
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