--- product_id: 396801196 title: "SMARTRO SC42 Professional Digital Hygrometer Indoor Room Thermometer" brand: "smartro" price: "R80" currency: ZAR in_stock: false reviews_count: 6 url: https://www.desertcart.co.za/products/396801196-smartro-sc42-professional-digital-hygrometer-indoor-room-thermometer store_origin: ZA region: South Africa --- # ±0.5℉ & ±2%RH accuracy Powered by 2x AAA batteries Updates every 10 seconds SMARTRO SC42 Professional Digital Hygrometer Indoor Room Thermometer **Brand:** smartro **Price:** R80 **Availability:** ❌ Out of Stock ## Summary > 🌡️ Stay ahead of the curve with precision you can trust! ## Quick Answers - **What is this?** SMARTRO SC42 Professional Digital Hygrometer Indoor Room Thermometer by smartro - **How much does it cost?** R80 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/396801196-smartro-sc42-professional-digital-hygrometer-indoor-room-thermometer) ## 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 - • **Precision Swiss Sensors:** Experience industrial-grade accuracy with readings updated every 10 seconds for real-time climate control. - • **24-Hour Max/Min Tracking:** Stay ahead of environmental changes with all-time and daily high/low temperature and humidity records. - • **Custom Calibration Control:** Fine-tune your device for pinpoint accuracy, perfect for sensitive environments like nurseries or instrument rooms. - • **Versatile Mounting Options:** Magnetic, wall-mount, or tabletop placement adapts seamlessly to your workspace or home environment. - • **Crystal Clear Backlit Display:** Large 3.5'' HD LCD with touch-activated backlight ensures effortless monitoring anytime, even in low light. ## Overview The SMARTRO SC42 is a professional-grade digital hygrometer and thermometer featuring Swiss sensors for ±0.5℉ temperature and ±2%RH humidity accuracy. It updates readings every 10 seconds and offers a large backlit LCD for easy viewing. With 24-hour max/min records, versatile mounting options, and manual calibration, it’s designed for precise indoor climate monitoring in homes, offices, and specialized environments. ## Description SC42 Humidity and temperature monitor is the perfect household device to keep you and your family's living conditions optimal. Built in with high precision sensor, it gives you reliable and highly accurate reading. ## 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 0.5℉(-4 to 158℉) and humidity is 2%RH (1 to 99% RH). The digital hygrometer is pre-calibrated for accurate temperature and humidity measurement. - Easy-to-Read Backlit Display: Temperature and humidity monitor with 3.5'' large HD LCD screen. A simple touch on the top will turn on backlit for 10 seconds. Clear and power-saving, reading more easily under weak backlit. Reliable operating buttons on the back for manual setting or °F/°C switching. Note: The backlit in the pictures is all in ON state. The backlit is not always on. - 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 with 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. Note: This thermometer cannot connect to phones. - Calibration Supported: The monitor can be manually calibrated to improve data readings when product placement or environmental factors impact your data accuracy. Powered by 2x1.5v AAA batteries (not included). ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B07YY1FB9D | | Battery Description | 2x1.5v AAA batteries | | Brand Name | SMARTRO | | Color | black | | Customer Reviews | 4.5 4.5 out of 5 stars (6,558) 4.5 out of 5 stars | | Included Components | 1 thermometer 1 manual | | Item Dimensions W X H | 8.6W x 8.6H centimeters | | Item Highlight | Humidity Gauge Pro Accuracy Calibration | | Item Weight | 0.13 Kilograms | | Manufacturer | SMARTRO | | Model | SC42 | | Mounting Type | Wall Mount | | Number Of Items | 1 | | Number Of Packs | 1 | | Operating Humidity | 1-99% with a +/- 2%RH tolerance | | Part Number | SC42EUK | | Temperature Accuracy | 0.5 degrees_fahrenheit | | Temperature Reading Accuracy | plus_minus_0_point_5_degrees_celsius | | Unit Count | 1.0 Count | | Upper Temperature Range | 158 Degrees Fahrenheit | | Voltage | 3.0 | ## Product Details - **Battery description:** 2x1.5v AAA batteries - **Brand:** SMARTRO - **Colour:** black - **Item weight:** 0.13 Kilograms - **Product dimensions:** 8.6W x 8.6H centimeters ## Images ![SMARTRO SC42 Professional Digital Hygrometer Indoor Room Thermometer - Image 1](https://m.media-amazon.com/images/I/71J0pGYeMFS.jpg) ![SMARTRO SC42 Professional Digital Hygrometer Indoor Room Thermometer - Image 2](https://m.media-amazon.com/images/I/71xxttfrSUL.jpg) ![SMARTRO SC42 Professional Digital Hygrometer Indoor Room Thermometer - Image 3](https://m.media-amazon.com/images/I/71kMBSbg7vL.jpg) ![SMARTRO SC42 Professional Digital Hygrometer Indoor Room Thermometer - Image 4](https://m.media-amazon.com/images/I/71si35LZMXL.jpg) ![SMARTRO SC42 Professional Digital Hygrometer Indoor Room Thermometer - Image 5](https://m.media-amazon.com/images/I/81-O4kKqaNL.jpg) ## Questions & Answers **Q: Does this display Humidity or does it display Relative Humidity?** A: From the Amazon product page, Specifications: "Humidity Range: 1~99%RH(relative humidity)". The Amazon page mentions "RH" at least 9 times, strongly suggesting that is what it displays. Additionally, humidity is the amount of water vapor in a unit volume of air (independent of temperature) which is expressed in kilograms per cubic meter. Relative Humidity is the PERCENTAGE of the maximum amount of water vapor in the air, possible at that temperature. Because the Hygrometer reports a percentage, not a mass per volume, there can be no confusion. RH is what you want for controlling comfort and environmental conditions (mold growth, etc,). **Q: Can this be calibrated if needed?** A: You can only calibrate if you have a standard that is accurate. You can adjust the reading up and down. I have 7 of these so I put them all in the same room for about 6 hours and I adjusted mine so it matched the rest. The rest were within 2 of each other, this one was 4 so I made it like the others. **Q: can you make the light stay on?** A: Not as far as I can see. Just a very light tap on the top of the frame will light it up for about ten seconds. That seems more than enough IMHO. If left on too much, the battery would drain sooner. Just a very very light tap. **Q: Your product information states: "calibration certification from aerospace institute for metrology and measurement technology" missing cert. doc?** A: I have never looked for any certification's. I did a comparison test with 4 different instruments and liked this model best, so I purchased 4 or 5 of them. They have been working fine in my home and hobby woodworking shop. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Reliable product *by on Reviewed in the United Arab Emirates 17 September 2024* Reliable product ### ⭐⭐⭐⭐⭐ BUENA CALIDAD *by on Reviewed in Spain 30 August 2024* He tenido muchos de estos y este es muy preciso, además se ilumina al moverlo, vale la pena el dinero q vale. ### ⭐⭐⭐⭐⭐ Great item *by on Reviewed in Australia 11 May 2024* Working great so far and I’ve had for a few months now. Accurate measure and backlight is very bright but not blinding. Great display and easy to read. ## 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.co.za/products/396801196-smartro-sc42-professional-digital-hygrometer-indoor-room-thermometer](https://www.desertcart.co.za/products/396801196-smartro-sc42-professional-digital-hygrometer-indoor-room-thermometer) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-16*