---
product_id: 165743724
title: "SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration"
brand: "smartro"
price: "288 kr"
currency: DKK
in_stock: true
url: https://www.desertcart.dk/products/165743724-sc42-professional-digital-hygrometer-indoor-thermometer-room-humidity-gauge-pro
store_origin: DK
region: Denmark
---

# Humidity Range 1-99% Updates Every 10s Temp Accuracy ±0.5℉ SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration

**Brand:** smartro
**Price:** 288 kr
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate Your Indoor Comfort with Precision!

## Quick Answers

- **What is this?** SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration by smartro
- **How much does it cost?** 288 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/165743724-sc42-professional-digital-hygrometer-indoor-thermometer-room-humidity-gauge-pro)

## 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

- • **Stay Informed, Always:** Track your indoor climate with 24-hour max/min records, ensuring you’re always in the know about your environment.
- • **Calibration for Perfection:** Manually calibrate for enhanced accuracy, ensuring your readings are always spot-on, no matter where you are.
- • **Versatile Mounting Options:** Easily place it anywhere with a retractable stand, powerful magnets, or wall-mounting capabilities—perfect for any room.
- • **Illuminate Your Environment:** Enjoy a clear view of readings with a 3.5'' HD LCD screen and a convenient backlit display for low-light conditions.
- • **Precision at Your Fingertips:** Experience industrial-grade accuracy with Swiss sensors that detect even the slightest changes in humidity and temperature.

## Overview

The SMARTROSC42 Professional Digital Hygrometer is an advanced indoor thermometer and humidity gauge designed for accuracy and ease of use. Featuring Swiss sensors, it updates readings every 10 seconds and offers a clear backlit display. With 24-hour max/min records and versatile mounting options, this device is perfect for maintaining optimal conditions in any space. Calibration support ensures precise data, making it an essential tool for professionals and home enthusiasts alike.

## Description

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

## 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 |
|---------------|-------|
| Upper Temperature Range | 158 Degrees Fahrenheit |
| Operating Humidity | 1-99% with a +/- 2%RH tolerance |
| Temperature Accuracy | +/-0.5℉ |
| Voltage | 3.0 |
| Mounting Type | Wall Mount |
| Item Dimensions W x H | 3.4"W x 3.4"H |
| Color | black |

## Product Details

- **Color:** black
- **Brand:** SMARTRO
- **Product Dimensions:** 3.4"W x 3.4"H
- **Item Weight:** 0.13 Kilograms
- **Battery Description:** 2x 1.5v AAA batteries

## Images

![SC42 Professional Digital Hygrometer Indoor Thermometer Room Humidity Gauge Pro Accuracy Calibration - Image 1](https://m.media-amazon.com/images/I/71J0pGYeMFS.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.

## 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.dk/products/165743724-sc42-professional-digital-hygrometer-indoor-thermometer-room-humidity-gauge-pro](https://www.desertcart.dk/products/165743724-sc42-professional-digital-hygrometer-indoor-thermometer-room-humidity-gauge-pro)

---

*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-28*