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SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge & Pro Accuracy Calibration

4.6 4.6 out of 5 stars 5,966 ratings

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Purchase options and add-ons

Color black
Brand SMARTRO
Product Dimensions 3.4"W x 3.4"H
Mounting Type Wall Mount
Upper Temperature Rating 158 Degrees Fahrenheit

About this item

  • ✨【The Best Industrial Grade Accuracy】Humidity gauge with built-in Swiss sensors, it detects subtle humidity and temperature changes and updates readings in each 10 seconds. Temperature tolerance is within ±0.5℉(-4 to 158℉) and humidity is ±2%RH (1 to 99% RH). The digital hygrometer is pre-calibrated for accurate temperature and humidity measurement.
  • ✨【Large Easy-to-Read Backlit Display】Temperature and humidity monitor with 3.5'' large HD LCD screen. A simple touch on the top to turn on backlit. Clear and power-saving, reading more easily under weak backlit. Reliable operating buttons on the back for manual setting or °F/°C switching.
  • ✨【24 Hours/All-time Max & Min Records】The room thermometer displays high and low records for the past 24 hours and All-time; Indoor thermometer measure conditions and identify changes in temperature and humidity instantly. Comfort Indicator ensures proper humidity control, helping you to maintain a comfortable atmosphere in your home.
  • ✨【Wide Applications & More Mounting Options】With a retractable stand, two powerful magnets and a wall-mount hole, this digital thermometer indoor can be easily attached to your refrigerator, wall or placed on a table. Suitable for baby’s room, nursery, office, closet, incubator, greenhouse, garden, wine cellar, basement critter terrarium etc.
  • ✨【Calibration Supported】The monitor can be manually calibrated to improve data readings when product placement or environmental factors impact your data accuracy. Calibration certification from Aerospace Institute for Metrology and Measurement Technology. Powered by 2x 1.5v AAA batteries (not included).

Customer ratings by feature

Easy to use
4.7 4.7
Easy to read
4.7 4.7
Battery life
4.6 4.6
Accuracy
4.5 4.5

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$17.99
Get it as soon as Tuesday, Apr 2
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$37.99 ($2.90/Ounce)
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Product guides and documents


Product Description

thermometer in

  • This humidity gauge is built in with high precision sensor. Calibration certification from Aerospace Institute for Metrology and Measurement Technology.
  • Accurate in Humidity and temperature test.
  • SC42 Humidity and temperature monitor is the perfect household device to keep you and your family's living conditions optimal. Reliable and highly accurate reading.

Specifications:

  • Switchable mode : °C/°F
  • Temperature Tolerance: ±0.5°F
  • Humidity Tolerance: ±2%RH
  • Temperature Range: -4~158°F ( -20~70°C)
  • Humidity Range: 1~99%RH(relative humidity)
  • Power Supply: 2*1.5v batteries (not included)

thermometer home
inside thermometer
humidity meter

Backlit LCD Display

  • A simple touch on the top to turn on backlit for a few seconds.
  • Maximum and Minimum records of humidity/temperature for last 24 hours or all-time and also indicates the current trends.

humidity gauge

thermometer indoor

meter

Supports Health and Sleep

  • Best temperature humidity for health: 64.4-77℉ (18-25℃),40-70% RH (comfortable)
  • Utilize this highly accurate humidity monitor to ensure the perfect night’s sleep, avoid headaches and improve general well being day in and day out.
  • Instantly distinguish between humidity conditions by different color.
  • High precision thermometer

Various Mounting Selections

  • You have simple steps to get this indoor outdoor thermometer mounted.
  • The digital hygrometer has a stand for table top use and strong magnets if you wish to have your device attached to a household appliance.
  • Also can be inserted into a wall hanging hole.

Wide Applications

  • This digital thermometer indoor can be easily attached to your refrigerator, wall or placed on a table.
  • Suitable for baby’s room, nursery, office, closet, incubator, greenhouse, garden, wine cellar, basement critter terrarium etc. Great present for Christmas.

Humidity Gauge Humidity Gauge
SMARTRO SC42 Other Brands
Customer Reviews
4.6 out of 5 stars
5,966
Temperature Range -4° to 158°F; -20° to 70°C 32° to 122° F; 0° to 50°C
Temperature Accuracy +/-0.5°F +/- 2°F
Humidity Range 1% to 99% RH 16% to 98% RH
Humidity Accuracy +/- 2% RH +/- 3%, from 21% to 80% RH
Frequency of Readings 10 seconds 15 seconds
High/Low Records 24 hours, all-time 24 hours
User-Set Calibration
Mounting Options Tabletop design, wall hanging hole, magnetic back Fold-out table stand, mounting clip
Backlit
Product Size 3.4" H x3.4" W 3" H x 2.5" W
thermometer weather station projection clock weather station
SMARTRO SC92 Wireless Digital Hygrometer Indoor Outdoor Thermometer SMARTRO SC91 Projection Alarm Clock with Weather Station SMARTRO SC31B Digital Projection Alarm Clock SMARTRO SC93 Wireless Weather Station with Indoor Outdoor Temp & Humidity
Customer Reviews
4.3 out of 5 stars
3,280
4.4 out of 5 stars
10,193
4.3 out of 5 stars
5,454
4.3 out of 5 stars
1,041
Offer 26.99 37.99 34.99 39.99
Temperature accuracy ±0.5℉ ±5℉ ±5℉ ±1.8℉
Humidity accuracy ±2%RH ±5%RH ±5%RH ±5%RH
Remote sensor

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge & Pro Accuracy Calibration


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SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge & Pro Accuracy Calibration
SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge & Pro Accuracy Calibration
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Price-18% $17.99
List:$21.99
-15% $16.99
List:$19.99
-23% $19.99
List:$25.99
-27% $18.99
List:$25.99
-10% $8.99
List:$9.99
-29% $9.99
List:$13.99
Delivery
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Customer Ratings
Easy to read
4.7
5.0
4.5
4.7
4.6
4.6
Accuracy
4.5
5.0
4.3
4.4
4.4
4.4
Battery life
4.6
4.5
4.6
4.5
Weatherproof
4.0
4.4
3.9
4.5
Easy to use
4.7
4.8
4.7
Sold By
TOPOD
LiChi
Intek
Intek
Intek
Intek
power source
Batteries
Aaa Battery (Included)
Battery Powered
Battery Powered
battery quantity
2 aaa
3 aaa
2 aa, 2 aaa
3 aaa
1 aaa
1 aaa
measurement accuracy
±1°F,+/- 5%RH
±1°F/°C and ±2%-3%RH
Accurate to ±1 Fahrenheit/Celsius and ±2%-3%
±1 Fahrenheit/Celsius and ±2%
upper temperature rate
158 degrees fahrenheit
158 degrees fahrenheit
158 degrees fahrenheit
158 degrees fahrenheit
mounting type
Wall Mount
Tabletop
Tabletop
Tabletop, Wall Mount
Tabletop
Wall Mount

Customer reviews

4.6 out of 5 stars
4.6 out of 5
5,966 global ratings

Customers say

Customers like the size, appearance, brightness, quality and readability of the humidity meter. For example, they mention it looks good, has a bright backlight and is well built. That said, they appreciate performance, value, and accuracy.

AI-generated from the text of customer reviews

443 customers mention359 positive84 negative

Customers like the accuracy of the humidity meter. They say it's very accurate, temperature reading is pretty accurate, and it comes calibrated to good accuracy. They also appreciate the temp and humidity tracking, which is helpful for monitoring the temperature and humidity in your home. The humidity sensor seems good and allows them to monitor the RH to prevent sweating.

"...(which it is capable of) but from my experience, the accuracy feels right on. I use this in an egg incubator and it works great...." Read more

"...They are accurate, have a small form factor with several means of display (magnetic pads, wall clip capability, swing-out table stand built-in),..." Read more

"Smartro fits easily on refrigerator. It's easy to read and accurate. Since I liked mine so much, I've bought a few for gifts." Read more

"It's accurate and it works so far,but were is the bale to set it on a desk?..." Read more

390 customers mention368 positive22 negative

Customers find the humidity meter easy to read due to the large digital display that illuminates brightly. They also like the readout on the screen, which gives more data. Customers also mention that the product is easy to use and read, and comes with a clearly written folding instruction book outlining all the features and options.

"The display is bright and easy to read. I haven't run a calibration (which it is capable of) but from my experience, the accuracy feels right on...." Read more

"...They are accurate, have a small form factor with several means of display (magnetic pads, wall clip capability, swing-out table stand built-in),..." Read more

"Simple and does the job. The thermometer is nicely lit when you push the button. Nice size." Read more

"...I chose this one because the numbers are big and bold and easy to read...." Read more

258 customers mention227 positive31 negative

Customers like the performance of the humidity meter. For example, they say it works well, is accurate, and constantly works. Some mention that it works for both temperature and humidity, and is simple and easy to read. That said, most are happy with their purchase and recommend it to others.

"...I use this in an egg incubator and it works great. After purchase last December, I didn't hatch any eggs right away...." Read more

"Simple and does the job. The thermometer is nicely lit when you push the button. Nice size." Read more

"It's accurate and it works so far,but were is the bale to set it on a desk?..." Read more

"Easy to read. Works as it should. You need to press the button for lighted display. Large and easy to read." Read more

136 customers mention106 positive30 negative

Customers like the quality of the humidity meter. They say it's well built, dependable, and has a great display. Some say that it'll be enough for most use cases and that it has s free standing support that works well. Overall, most are happy with their purchase and recommend it to others.

"...Simple to use and place anywhere needed. I will probably buy some more of these soon." Read more

"Just as described and very good quality, accurate." Read more

"...The battery slider door is tough plastic and strong. The outer surrounding case is grooved so it's easy to hang onto...." Read more

"...The first unit I received was faulty. It had issues with the humidity accuracy. I compared the measurement with 2 other Hygrometers...." Read more

88 customers mention79 positive9 negative

Customers like the appearance of the humidity meter. They say it has a beautiful display, is easy to set up and use, and has s great design. The product itself seems very nice and easy to read. The screen is very crisp and colorful, and the readout matches the room dehumidifier and temperature settings. They also like how the display is set up with different colors and the size of the fonts.

"The Temperature and Humidity readings are accurate. The display is nice and big. Well worth the price...." Read more

"...It's a really nice hygrometer, with nice display and is pretty accurate. Alas, after a year the battery would not last for more than 48 hours...." Read more

"The display is bright and colorful. Items looks nice. The temperature reading was spot on.The first unit I received was faulty...." Read more

"...Nice. ..." Read more

84 customers mention75 positive9 negative

Customers like the value of the humidity meter. They say it's excellent for the price, works great, and is of great value.

"...Price point is very reasonable. Very pleased with this hygrometer!..." Read more

"...The price seems very good and I could not find anything similar in this price range locally." Read more

"...The display is nice and big. Well worth the price. I don't know about battery life, I just got it." Read more

"Works great at a very affordable price." Read more

82 customers mention82 positive0 negative

Customers find the brightness of the humidity meter to be great. They mention that the backlight is bright, and the illumination of the panel is a nice feature. The display is easy to read, and customers appreciate the lighted feature for checking the temperature at night. The touch control at the top to activate the back light is great, and waving their hand turns the backlit to read at night or in dim conditions.

"The display is bright and easy to read. I haven't run a calibration (which it is capable of) but from my experience, the accuracy feels right on...." Read more

"Simple and does the job. The thermometer is nicely lit when you push the button. Nice size." Read more

"...its is bright when you hit the light so other than the desk top bale i give it a thumbs up." Read more

"...nice size and I like that you can touch the top of the screen and it lights up. It is easy to read and the screen light really helps...." Read more

81 customers mention81 positive0 negative

Customers find the size of the humidity meter to be easy to read. They mention that the numbers are big and bold, and the display is large. The product is small enough to carry around to individual rooms, and its measurements are spot on.

"...They are accurate, have a small form factor with several means of display (magnetic pads, wall clip capability, swing-out table stand built-in),..." Read more

"...The thermometer is nicely lit when you push the button. Nice size." Read more

"...I chose this one because the numbers are big and bold and easy to read...." Read more

"Smartro fits easily on refrigerator. It's easy to read and accurate. Since I liked mine so much, I've bought a few for gifts." Read more

Good Device
5 Stars
Good Device
Most of these devices seem to use the same screen layout. I chose this one because the numbers are big and bold and easy to read. It has a soft touch light control on the top - just touch it gently and it lights up. It has two strong magnetics. This one is attached to my fridge.In the description, it states the device is calibrated. I assume using international standard of calibration? I have no idea.However, most of the time it matches or is within one tempt degree of my furnace thermostat and my other brand new hygrometer (Acurite). The humidity reading matches the Acurite. I decided to use two different companies for comparison.To conclude, I like the device and would recommend it.
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5.0 out of 5 stars Good Device
Reviewed in the United States on February 7, 2024
Most of these devices seem to use the same screen layout. I chose this one because the numbers are big and bold and easy to read. It has a soft touch light control on the top - just touch it gently and it lights up. It has two strong magnetics. This one is attached to my fridge.
In the description, it states the device is calibrated. I assume using international standard of calibration? I have no idea.
However, most of the time it matches or is within one tempt degree of my furnace thermostat and my other brand new hygrometer (Acurite). The humidity reading matches the Acurite. I decided to use two different companies for comparison.
To conclude, I like the device and would recommend it.
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Customer imageCustomer image
One person found this helpful
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Reviewed in the United States on March 24, 2024
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Reviewed in the United States on March 14, 2024

Top reviews from other countries

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GABRIEL GUTIERREZ
5.0 out of 5 stars Llego a tiempo y bien empacado
Reviewed in Mexico on September 22, 2023
Didier
5.0 out of 5 stars Top
Reviewed in France on August 2, 2023
Tom
5.0 out of 5 stars Accurate
Reviewed in the United Kingdom on November 12, 2022
Xavier A
5.0 out of 5 stars Great product overall
Reviewed in Canada on September 27, 2020
Lorna Yeo
5.0 out of 5 stars Simple, Easy, Great to use
Reviewed in Singapore on May 11, 2023