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ThermoPro TP50W

(74 customer reviews)

$11.99 $11.99

Availability: Out of stock

Temperature and Humidity Monitor, highly accurate temperature readings and affordable

  • Air comfort indicator】: Humidity meter with humidity level icon indicates air condition — DRY/COMFORT/WET, allowing this humidity sensor to ensure you’re always aware of changes to your home/household with just a quick glance.
  • High accuracy & Quick refresh】: Inside thermometer has a high accuracy of ±2~3%RH and ±1°F, making it ideal for measuring fluctuating readings like in a greenhouse; Data measurements are updated every 10 seconds to give you the latest changes in the environment.
  • High & Low records 】: Accurate hygrometer digital thermometer displays high and low temperature & humidity, always get ready to the changes of the environment.
  • Healthier home & Environment】: Thermometer hygrometer with temperature and humidity monitor ensures proper indoor humidity control has important skin, allergen and other health benefits; Can also be as a refrigerator thermometer, freezer thermometer, reptile thermometer, soil thermometer, humidor hygrometer, cigar hygrometer and more.
  • Smart design】: Indoor room thermometer features a tabletop stand to place the temperature monitor on your counter or use the magnetic back to attach to a fridge; °F/°C Selector; Powered by 1 x AAA battery (included).
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74 reviews for ThermoPro TP50W

  1. Stephen

    This thing seems to match up equally to what my dehumidifier says. So inexpensive and accurate. Highly reccomend.

  2. A R.

    Unit arrived fast and safe.Temp seems right on with my old mercury thermometer and its easy to read. I’m HAPPY!!!! THANK YOU AMAZON!!

  3. Robert Fredrick

    I have a basement woodworking shop, and there were days when it was uncomfortable working there. I didn’t think it got that hot (it is in a basement after all), so I thought it might be the combination of temperature and humidity. The unit works quickly, and I soon learned that the temperature was only 75 but the relative humidity was 70%, which is much too high. I purchased another dehumidifier for the shop, and conditions are much better. The unit is small and battery operated, so it is easy enough to move if you want to check another room. It also has a feature that lets you know both the high and low readings for the temperature and humidity for the past 24 hours and since the unit was put in service.

  4. poorteacher

    I failed to check dimensions, but this petite hygrometer is easy to read and reports reliable temperature and humidity data so far. Glad I purchased it. Takes up zero space!

  5. JB

    Love that I have the option to attach to cubicle wall or stand up on desk at work. Provides accurate info for maint dept

  6. Kathy Newlin

    works great.

  7. Victor

    I had it for a couple of months and I did drop it once and it completely broke. It does it function so not much to say.

  8. Melinda C

    We actually use this product at work in a lab to measure the humidity, temp, and pressure of the lab throughout our working day. It’s so easy to read that I ended up purchasing one to use in my bearded dragon’s tank at home so we can keep track of temperature and humidity. Love it!

  9. Wai

    Accurate, handy. Good to have the high low reading. But the panel is not easy to read under weak illustration.

  10. Tiffany

    I was looking to get a humidifier. Before I splurged on that, I thought I first should check what my current humidity was. At the time, I was living in Los Angeles, and it was winter. Both meters read that my humidity was 9% at the lowest. I bought a humidifier immediately because I knew I needed it.The humidifier I got can be set to turn off once the humidity reaches a certain level. I used this as a reference to determine the accuracy of these meters. If I set my humidifier to turn off at 50% humidity, these meters when close by would always read 50%. I’ve cross-referenced thermometers to check the accuracy also, and they’ve always been on point.Overall I’m very impressed with these little things. I love having two since I keep plants in separate areas, I can put a meter in multiple places. I love that they have a kick stand to prop themselves up. They came with batteries and I’ve had mine on for almost a year straight and so far no dead batteries. They’re small and subtle enough to blend into an area. They also magnetize, which is very cool. I’ve kept mine on the fridge before.Lastly the high/low feature could be better. I wish I knew how far back the meter pulls for the high/low data. I lived in California when I got them, and now I live in Alaska. The high/low has been decreasing with time which tells me there’s a drop off of data, because my all time high temp use to be 117, now it’s “only” 101. I wish I knew the amount of time data is stored to pull these high/low data sets. This is my only complaint and it’s so small, it’s mostly out of curiosity than any actual fault of the device.The smiley/frowny faces are a cute touch, they indicate when humidity is nicely high and depressingly low.For the price, and the quality/accuracy, I will definitely repurchase. These are great for houseplant owners that just want a little more data on the ambiance of their plant’s area without breaking the bank. They’d also be good for anyone that suffers from skin/breathing conditions impacted by humidity/temperature.

  11. Jimmy

    This is my second purchase. This is dependable and easy to read. But, be careful. If you drop it on the floor, the screen may break easily.

  12. Kristi

    All three of the pictured items work equally well. The TP55 pictured on top has the larger display uses two AAA batteries where the two smaller ones both use a single AAA battery. These three devices are all mounted to my HVAC return air vent in the basement and all have solid magnet mounts; as you can see in the photo all three of these devices provided temperature readings within 1 degree of each other and within .5 degrees of my mercury thermometer which read right around 71.5 degrees. The humidity had a little more variance, but at 3 degrees from the low end to the high end across three devices this is completely acceptable. Too early tell about about battery life but all of them have very clear dispays at eye level with hardly any light shining directly on them but viewing angle and ambient light has a detrimental effect on all three displays; the Thermo-pro TP55 has the best display and with its blue backlight it would provide the clearest display in a bright enviornment at wider angles

  13. Karen Sanderlin

    As advertised

  14. Teresa Merrow

    I got a new Refrigerator and I wanted to make sure it was keeping Temp. It was everything I hoped it would be.

  15. TreeFarmer

    I got one of these a few years back and have been very happy with it. It matched the humidity and temperature on an old Taylor temp and humidity gauge. You can see that gauge in the background of the picture.Well I’m moving and our new place has a finished lower level and I’ll be running a dehumidifier down there in the Summer months to keep the humidity levels down so that we don’t get mold/mildew/musty odors. I want to be able to measure humidity at the far ends of that area and in the middle where I plan on placing the dehumidifier. So, I ordered two more. At around $10 each, I think these are a bargain.My first thought when the two new ones arrived was to see how they compared – see the picture with this review. Humidity shown is 56, 55, and 57. Interestingly, my 2 year old one shows 56 which matches my old Taylor. I am assuming that one of the new ones reads 1% RH higher and the other reads 1%RH lower. This is totally acceptable for this type of gauge for what I’m using it for.I rarely use the temperature measurement but 74.7, 74.8, and 74.1 are all reasonable readings.I’m so glad that I got the additional two gauges and they will be a big help in figuring out where to place my dehumidifier and what to set it at to assure my lower level is kept at a low enough humidity level to avoid any issues.Update: I forgot to mention the humidity and temperature range feature. I think that this can be quite useful. Once you put the battery in and the unit starts, it will keep track of the lowest and highest reading for both humidity and temperature.Now, let’s say that you forgot to turn your dehumidifier on in early Summer – it might get as high as 70 or 80%RH. So you turn the dehumidifier on and it brings things down. You don’t care about that high reading any more, but you might want to see what sort of range running the dehumidifier is giving you. Just push the C/F setting button on the back and hold for 2 seconds – that will reset the high and low for both humidity and temperature – very handy feature! I saw one review that said that it couldn’t be re-set … I’m thinking that person didn’t read the owners manual. 😉 You could also re-set it by simply removing the battery and then putting it back in, but the 2 second button press is the way to go.Aug30, 2022I’m adding an update to this review – I ordered another gauge, you can see I like these. 😉 However I had a problem with it – it reads 4% lower than my other ThermoPro’s – see second picture – I marked that one with a small piece of green tape. I had this problem with one I ordered a few months back- returned it and reordered and the next one was OK.And that said, I have had no problem at all having them last. Some reviewer have reported failures after a short time. Some of the ones I have are around 2 years old now.

  16. Shop Shop Shop

    this works as advertised!!! yes i would buy it again!

  17. B. Mathew

    I have 4 of these and overall love them as they are accurate to themselves and other temp/humidity gauges so I trust their measurements but I’ve had issues with the LCD display on 2 of the 4 after less than a year of ownership. Some of the LCD lines that form the numbers no longer work so correct readings aren’t possible. So far it has just been on the small gauges that show minimums and maximum levels and not the large current temp and humidity read out.Best feature is accurate, easy to read, and the min/max displays are very useful for tracking humidity in crawlspaces or gun safes or other less used spaces.

  18. Jeremy Rickard

    Work for want I needed.

  19. Amy Hessler

    We raise chickens and wanted to test the accuracy of our incubator. I like the fact there’s 2. We can keep one in the brooder for the chicks, and one in the incubator to test it’s accuracy. Both read the same as the incubator. They both read the same as the hydrometer we have for the house. So I am pleased. Plus, they are small enough to fit in the tiny spaces, and they clean up nicely if they fall and the bird roost on them.

  20. jenlyn1470

    I luv it. It’s easy to read.

  21. mikeb

    nothing special

  22. Beanie

    Good quality and temp reading less than 1 degree different next to thermostat. Like the read out on humidity that show current and the highest and lowest measurement.

  23. HouseCat

    It made us realize we need a dehumidifier and one is on the way to our place. We also know when to open doors for fresh air and when to keep them shut to avoid excessive moisture.

  24. ITSnake

    Temperature reading is with in 1 degree of my AC thermostat and gives me a real time reading of the humidity as well. I plan to purchase more of these and place them through out the house.

  25. Shontel

    Exceptionally stunning quality. Outstanding delivery. Exceptionally nice packaging. Ever so pleased.

  26. Nino Ed

    I like the fact that it goes with me wherever I need to stay for a time. I don’t like the fact that the temperature does not read the new environment quickly. I do wish there were a small led for light, hard to read in the dark.

  27. Andrew

    Seems like a lot of other reviews don’t realize you can hold the F/C unit button on the back for a few seconds to reset the high/low. I fiddled with it and discovered this as soon as I got it.Otherwise works as expected, shows humidity and temp with a high/low. Not sure if high/low resets by itself or not over time, I’ve manually reset it when I moved it to a different room

  28. John E. Ford


  29. Keith

    The ThermoPro TP50 arrived on date promised. A fair price for what so far seems to be a very accurate device. Temperature and Humidity readings both are accurate on my unit. Using in basement to monitor humidity levels with my new dehumidifier.

  30. geobob2242

    I use this in an out building and it does the job for me. It is very accurate and easy to read. Nice product.

  31. JDunn

    I use them in different rooms. Easy to read from a distance. Accuracy within 1-2% for humidity when next to one another – only way I can check accuracy.

  32. Nas

    Current readings with range good idea. Perfect shape, good quality and nice view. My only gripe is temperature reading should be on the top not at the bottom to take away the confusion.

  33. PoconoRick

    Good price. AAA battery- inexpensive to replace

  34. Big Jim

    Doable, has option to place on flat surfaceor mount on wall.

  35. RoseC

    Alot smaller then I thought. Works great, seems to be pretty accurate

  36. Lifelong Star Trek fan

    My office tends to be cool and dry, sometimes a bit too cool. This is very useful for documenting the actual conditions. Data always beats anecdotes.

  37. Kathy C

    It is small but easy to read

  38. LifeWay

    I recently purchased this unit due to being concerned with the effects of high humidity within our home. I purchased this particular unit primarily because of the high reviews it had received. I can attest that it deserves those reviews. This device quickly reacts to both humidity and temperature changes in the area within where it is placed. This in turn allows you to effectively evaluate your home’s problem areas and then work toward a solution, if needed. Simply, it works as advertised. BUY IT!!!

  39. michael fellows

    Good so far, don’t know about accuracy or weatherproof.

  40. Alex

    The odds of having 2 go bad, one before the other and tried new batteries. Garbage products. Lasted 3 months and in garbage it went like the other electronics with THE BS HYPE WRITTING HOW GOOD THE PRODUCT IS you see over and over. But I’m the idiot for buying it.

  41. Diane Shirck

    I like it very much. It’s easy to readSeems accurate I have no way of knowingFor the money I’d buy it again

  42. Skipper

    The “feel” of temperature & humidity varies from person to person. Recentlywe had an indoor heating/cooling system installed in our home, and this summerthere’s been much discussion about individual comfort. This nice little unit has beena clear indicator of the variations of air conditioning in my room. It’s a great help indetermining my personal comfort zone – no guesswork anymore. My only wishis that the top [larger] number would be the temperature, rather than the humidity.The unit works perfectly, and I’m happy to have it!

  43. Brenden

    This is a nice little unit. Keeps me up to date on my humidity and temp in the house.

  44. Sancho Panza

    This unit is a “must-have” for monitoring humidity especially in the high-humidity areas of your house. I have used it throughout the year and it provides an accurate reading of the humidity in my basement. I use it in conjunction with my Midea de-humidifier and I cross-check the ThermoPro readings (in another area of the room) with the Midea unit. Very accurate, very inexpensive / I highly recommend it.

  45. Janet Reeves

    I really liked this item. It was easy to set up and works well.

  46. Ranulfo G.

    I have been super happy with this product.Super easy to set up and use!

  47. Tah

    I keep one in my home to monitor the humidity as I do have an aquarium and frog habitat. I don’t want the humidity high in the home because that is not good for the home or us! I like it so well, I ordered one for my Art studio, she shed. The humidity is a bit high in there, and that’s good to know. I need to figure out a new door rather than the one that came with the shed. I recommend this ThermoPro.

  48. S. Cook

    Easy to set up and easy to read.

  49. Gunguy

    I like keep track of the temperature and humidity in various areas of the house so I have several positioned around. I’ve had two for several years now and this is number three for another room. They all work like a charm.

  50. Coldbrew

    I have two other ThermoPro hygrometers and am very happy with them. But, this latest purchase does not record the humidity properly – it reads about 5% high. I love the screen and how easy it is to read temp and humidity and the ability to see highs/lows. But, I am really disappointed that the humidity reading is not accurate.

  51. Earl Jones

    Works as expected.

  52. Oscar Davis

    Just what i needed for the inside of a gun safe

  53. Amazon Customer

    This really works good. I wanted to keep track of humidity in different rooms of my house and this is perfect. This can go anywhere. It has a kick stand for placing on a desk or table and a magnet for vertical metal surfaces like a fridge or filing cabinet. The temp and humidity updates quickly and the highest and lowest readings for both is very useful. You can reset it in the morning and see the high and low for that day that night. I don’t think it’s made for outdoor use. I bought this over a year ago and the battery is still going strong. Very good purchase

  54. Rhonda

    Works great, seems accurate, easy to use & the display is easy to read.

  55. Beng Derrik Purger

    I have five of these and they give readings within one or two decimals of one another.

  56. Eunice E. Ham blen

    This is an inexpensive accurate reading of both temperature and humidity. I would improve it by adding a night light.

  57. brian young

    Which they were bigger

  58. Jaimee

    I wish there was a back light on it because I use it for my daughter’s room, but that’s not a deal breaker for me. I just have to tilt it towards a light and I can see it fine in the dark. I also bought one for my room and it’s seems accurate. I’ve only measured it against the same item and my baby monitor in my daughter’s room. They are usually the same or off by one degree. But they are at separate ends of her room. Also, when I have my water swamp cooler on the humidity on the screen increases, so I know that works also. I live in very dry conditions, so this is helpful.

  59. Aisling D.

    This is a great tool to track temperature and humidity. It’s also a great value for the price.Since Summer 2022 has been a season of extreme temperatures, and since I’m sensitive to high heat and humidity, we need to track both throughout our home.We already had three similar devices, but needed one more. This one looked good, and it’s actually far easier to read than others that had cost us more.It worked right out of the box. We compared it with our other, similar devices, and all gave the exact same measurements, or were no more than a degree different from one another.I especially like how light this device is, and how powerful the magnet is on the back of it. We’re using this one in the kitchen, on our freezer door. The device remains firmly attached, even with frequent opening and closing of the freezer and refrigerator doors. (Well, in a heat wave, we’re drinking a lot of iced and carbonated beverages to stay cool.)This is definitely a five-star item for how accurate it is, how easy it is to read, even in low-light conditions, and – of course – how affordable it is. If you need to check temperature or humidity (or both) in your home or workplace, or even outdoors on your porch, this device is ideal.


    Does the job, measures humidity as well as inside temperatures accurately. Goes hand in hand with a dehumidifier. I gave 2 in different parts of the basement averaging 44% humidity measurement.

  61. John D.

    My purpose for this Hygrometer is to measure the humidity in my crawl space under my home. I purchased two of this brand and one of another brand. My purpose was to compare findings from more than one manufacturer. I found all three measurements were within a point of each other. I cannot attest to their accuracy or if they are weatherproof.

  62. Mr.Bill

    Used indoors. Bought two. One for each floor of my home.

  63. Douglas B. Brown

    I wrote a previous review, but confused this item with another product the Therm Pro is great!

  64. Anthony B

    This is pretty neat and it was well needed it’s nice now to know how hot it is in my room and what the humidity is that way it’s easier to set the air conditioner accordingly

  65. Julia Child (MA)

    I wanted to know the humidity level and this works good . I have it on the refrigerator as it doesn’t sit on a shelf unless it is propped up. Does the job .

  66. Rene’ Stewart

    Works like it’s described. We are pleased

  67. James R. Michels

    In an age of complexity this is a simple product that does what it is supposed to.

  68. Gregory Longfellow

    I had a thermometer I didn’t trust, so I got this one, and this one is trustworthy.

  69. Tammy

    I use this in a horrible air conditioned room. The air conditioner doesn’t reach the coolness it should be. So I just use it to test the temperature and humidity. I don’t know if it’s accurate or not but by the feel of it it’s seems pretty darn close. Only gave 4 stars because I really don’t know if it is accurate.

  70. Amazon Customer

    I wanted to make sure my thermostat temperature was accurate, and this is very helpful! I placed it sitting above my thermostat, and it almost looks like part of it. Just what I needed.

  71. Mark USA

    I think my ratings will say it all…..Thanks

  72. Kindle Customer

    It is nice and small so it hardly shows on my end table. It has very big numbers so that my older eyes can read it very easily.

  73. Jeremiah

    I don’t have another device with known accuracy to compare the readings of this one to. Neither do I have a group of devices to take an aggregate of as a comparison to measure the accuracy of this device. I can tell you it consistently reads about 4%-6% higher than the dehumidifier itself, but I don’t know which is most accurate. I generally assume the actual humidity to be between the two.I do know that it responds to humidity changes, and when I feel hot and sticky from the humid air, this confirms that with a high humidity reading. When it’s lower humidity and feels more comfortable, this confirms that with a corresponding reading.

  74. Douglas Stnschndr

    These magnetic attach temp and humidity sensing devices are great for keeping an eye things. I have them in our fridge and freezers to make those temps are correct. I also use them in areas that might get too humid such as crawl spaces and basements. Also good for rooms so you know what the temperature actually is as opposed to what wall thermostat is indicating.

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TP50 Specification

Temperature Range -22.0 to 140.0℉(-30.0 to 60.0℃)
Temperature Tolerance ±1℉(±0.5℃)from 32 to 140℉(0 to 60℃)

otherwise ±1.8℉(±1℃)

Humidity Range 10%~99%
Humidity Tolerance ±2%from 30% to 80%,otherwise ±3%
Sensor Type NTC
Refresh Rate 10 seconds
Display LCD, 2 1⁄8 Length x 1 3⁄4  Width inches(54.0L x45.0W mm)
Backlight N
Unit Size  3 1⁄8 Length x  2 5⁄8 Width x 1 Height inches

(79.0L x 66.0W x24.0H mm)

Power 1.5V (1xAAA Battery)

Instruction Manual

Notes on cleaning

TP-50 Notes on Cleaning

Separate the device from the power supply or remove the batteries before cleaning. Only use a dry cloth to clean the exterior of the device. Do not use any cleaning fluid to avoid damaging the electronics.


  1. Display: Displays the current humidity and temperature, and record maximum and minimum humidity/temperature.
  2. °C/°F/Clear Button: Press once to change the temperature display to either °C or °F. Press and hold for 2 seconds to clear the record maximum and minimum humidity/ temperature readings.
  3. Battery Compartment: Holds one 1 AAA battery to power the unit.
  4. Comfort Level: 3 icons: DRY, COMFORT, WET.
    • If humidity is below 30%: Dry.
    • If humidity is between 30% to 60% AND temperature is between 68°F ~ 79°F (20°C ~ 26°C): Comfort.
    • If humidity is above 60%: Wet. Elsewise: No icon.
      1. Totally wireless tabletop and magnet- mountable design.

        Before first use

        1. Insert or Replace Battery: Insert one AAA battery with correct polarity ( ) and (-) as indicated.
        2. Do not immerse product in water.
        3. The humidity and temperature monitor is now ready to use.

          Care of your Humidity/Temperature monitor

          • Do not leave exposed to extreme high or low temperatures since this may cause damage to electronic parts and plastics.
          • Remove battery if planning to store for more than four months.


Question: Any way to calibrate temperature?

Answer: No, there is no way to calibrate this unit. If it is far enough off compared to a proven thermometer or hygrometer that it requires calibration to fall within the manufacturer’s stated percentage of accuracy then it is defective.

Question: Is it display also Date and time?

Answer: No it does not.

Question: Can i reset the comfort range? 79 degrees f is much too high to be comfortable imo?

Answer: The comfort indicator will only apply to HUMIDITY not temperature. 30-80% is typically seen as a comfortable range for humidity. Temperature comfort will vary between individuals, humidity typically does not.

Question: can this be used in a hermit crab habitat?

Answer: I think you should be able to put it in there without any issues!

Question: Will this malfunction in high humidity? i want to use this in a brazilian rainbow boa terrarium and condensation is typical?

Answer: The location I am monitoring typically runs about 75 – 85%. The other day, I discovered a water leak when I put the monitor in a new location. A couple of hours later, it was in a puddle with water drops all over it. Today it seems to be working just as it always has. So, I would say it seems to work well in high humidity.


Product Comparison

Product Info
ThermoPro TP-50 Humidity and Temperature Monitor

ThermoPro TP50

ThermoPro TP49 Digital Indoor Hygrometer Thermometer Humidity

ThermoPro TP49

ThermoPro TP-55 Humidity and Temperature Monitor

ThermoPro TP55

ThermoPro TP-60S Features 4

ThermoPro TP60S

Price $11.99 $11.99 $8.99 $8.99 $15.99 $15.99 $19.99 $19.99
Availability Out of stock In stock In stock In stock
Alexa capability No No No No
Backlight display No No Yes No
Barometric pressure No No No No
Bluetooth No No No No
Calibration feature No No No No
Comfort indicator Yes Yes Yes No
High low records Yes No Yes Yes
Indoor outdoor Indoor Only Indoor Only Indoor Only Indoor and Outdoor
Mobile app No No No No
Range - - - 200ft
Remote No No No Yes
Remote sensor - - - TX2
Temperature humidity alerts No No No No
Weather forecast No No No No
Wifi capability No No No No
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