--- product_id: 314557049 title: "SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration" brand: "smartro" price: "€ 0.14" currency: EUR in_stock: false reviews_count: 13 url: https://www.desertcart.hr/products/314557049-smartro-sc42-professional-digital-hygrometer-indoor-thermometer-room-humidity-gauge store_origin: HR region: Croatia --- # ±0.27℃ Temp Accuracy ±2% RH Humidity Precision 10-sec Real-time Updates SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration **Brand:** smartro **Price:** € 0.14 **Availability:** ❌ Out of Stock ## Summary > 💼 Stay sharp, stay comfortable — precision climate control for the savvy professional. ## Quick Answers - **What is this?** SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration by smartro - **How much does it cost?** € 0.14 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/314557049-smartro-sc42-professional-digital-hygrometer-indoor-thermometer-room-humidity-gauge) ## Best For - smartro enthusiasts ## Why This Product - Trusted smartro brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Swiss Sensor Precision:** Industrial-grade accuracy ensures your environment is monitored with pro-level reliability. - • **Max & Min Records Tracking:** Keeps 24-hour and all-time humidity and temperature highs and lows for smart environment control. - • **Versatile Mounting Options:** Magnet, stand, or wall mount—fits perfectly in any professional or home setting. - • **Certified Calibration Support:** Manual calibration backed by Aerospace Institute certification guarantees trusted data. - • **Crystal Clear 3.5'' HD Display:** Large backlit screen for effortless reading anytime, even in low light. ## Overview The SMARTRO SC42 is a professional-grade digital hygrometer and thermometer featuring Swiss sensors with ±0.27℃ temperature and ±2% RH humidity accuracy. It updates readings every 10 seconds on a large 3.5'' backlit LCD, tracks max/min records, and offers versatile mounting options. Calibration is supported and certified, making it ideal for precise indoor climate monitoring in offices, nurseries, greenhouses, and more. ## Description Product Description This humidity gauge is made of high precision digital sensors. Calibration certification from Aerospace Institute for Metrology and Measurement Technology. Accurately 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: ±0.3°C Humidity Tolerance: ±2%RH Temperature Range: -20~70°C ( -4~158°F) Humidity Range: 1~99%RH(relative humidity) Power Supply: 2*1.5V AAA batteries (not include) 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. Supports Health and Sleep Health temperature humidity：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. Review: Accurate - I brought one checked it via a salt test bang on 75% brought another same as bang on 75%. Very pleased with the accuracy, very easy to use & has a decent magnet to hang up. to verify if your meter is correct put it in a plastic container with a cap filled with salt add a very small amount of water to the salt so you can still pick it up & it doesn’t run, seal it properly leave it a full 24hrs and it should read 75% if not it’s out & needs calibration ) Review: Looks good - Although difficult to verify, compared to the last one I bought seems to be close to the mark. Temperature sense is on point and all seems to be working ## Features - ✨【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 ±0.27℃(-20 to 70℃) 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). ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07YY1FB9D | | Battery Description | AAA (2) | | Battery description | AAA (2) | | Brand | SMARTRO | | Colour | blue|black | | Customer Reviews | 4.5 out of 5 stars 6,513 Reviews | | Item Weight | 0.13 Kilograms | | Item weight | 0.13 Kilograms | | Manufacturer | SMARTRO | | Manufacturer Part Number | SC42EUK | | Model Number | SC42 | | Mounting Type | Inside Mount | | Mounting type | Inside Mount | | Temperature Accuracy | 0.27 | | Unit Count | 1.0 count | | Upper Temperature Rating | 71 Degrees Celsius | | Upper temperature rating | 71 Degrees Celsius | | Voltage | 3.0 | ## Product Details - **Battery description:** AAA (2) - **Brand:** SMARTRO - **Colour:** blue|black - **Item weight:** 0.13 Kilograms - **Mounting type:** Inside Mount ## Images ![SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration - Image 1](https://m.media-amazon.com/images/I/71J0pGYeMFS.jpg) ![SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration - Image 2](https://m.media-amazon.com/images/I/71xxttfrSUL.jpg) ![SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration - Image 3](https://m.media-amazon.com/images/I/71kMBSbg7vL.jpg) ![SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration - Image 4](https://m.media-amazon.com/images/I/71si35LZMXL.jpg) ![SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration - Image 5](https://m.media-amazon.com/images/I/81-O4kKqaNL.jpg) ## Questions & Answers **Q: Is it suitable and durable for a high humidity environment? Like a reptile Vivarium? Humidity could be between 70-80% on a consistent basis.** A: If the climatic conditions around the device are within the manufacturers normal operating range, I would expect the device to operate satisfactorily. In my opinion, the 70 - 80% humidity range should be ok. **Q: How can I manually calibrate this for better accuracy? It says in the listing description this is a feature but I cannot work out how to do it.** A: Calibrated mine but I can't find instructions at the moment. It was easy and straight forward using the + and - buttons. Sorry can't remember the sequence. Just tried and I think you press set button until it flashes and then up or down button to alter . Then leave untill it settles. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Accurate *by T***M on 12 November 2022* I brought one checked it via a salt test bang on 75% brought another same as bang on 75%. Very pleased with the accuracy, very easy to use & has a decent magnet to hang up. to verify if your meter is correct put it in a plastic container with a cap filled with salt add a very small amount of water to the salt so you can still pick it up & it doesn’t run, seal it properly leave it a full 24hrs and it should read 75% if not it’s out & needs calibration ) ### ⭐⭐⭐⭐⭐ Looks good *by A***R on 11 October 2021* Although difficult to verify, compared to the last one I bought seems to be close to the mark. Temperature sense is on point and all seems to be working ### ⭐⭐⭐⭐⭐ Digital hygrometer & thermometer *by P***L on 6 January 2022* I wanted a more accurate device to show me the temperature and relative humidity on my boat in the winter months. I like the large, easy to see & read, digital display, also with bright illumination if required. The device correlates with other similar devices I have. I have also used it at home and would recommend this particular product versus lower cost alternative products. ## Frequently Bought Together - SMARTRO SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration - ThermoPro TP55 Digital Indoor Hygrometer Thermometer, 4-Inch Temperature / Humidity Monitor with Touchscreen and Backlit, Indoor Room Thermometer / Humidity Meter for House Home Greenhouse - ThermoPro TP50 Digital Hygrometer Indoor Thermometer Room Thermometer and Humidity Gauge with Temperature Monitor --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/314557049-smartro-sc42-professional-digital-hygrometer-indoor-thermometer-room-humidity-gauge](https://www.desertcart.hr/products/314557049-smartro-sc42-professional-digital-hygrometer-indoor-thermometer-room-humidity-gauge) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-24*