---
product_id: 167490430
title: "SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History"
brand: "saf"
price: "1805 Lei"
currency: RON
in_stock: true
reviews_count: 7
category: "Saf"
url: https://www.desertcart.ro/products/167490430-saf-aranet4-home-wireless-indoor-air-quality-monitor-for-office
store_origin: RO
region: Romania
---

# 90-day data history Wireless & portable 4-year battery life SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History

**Brand:** saf
**Price:** 1805 Lei
**Availability:** ✅ In Stock

## Summary

> 🌬️ Breathe smarter, work sharper — your air quality guardian in your palm!

## Quick Answers

- **What is this?** SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History by saf
- **How much does it cost?** 1805 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/167490430-saf-aranet4-home-wireless-indoor-air-quality-monitor-for-office)

## Best For

- saf enthusiasts

## Why This Product

- Trusted saf brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ultra-Long Battery Life:** Up to 4 years of cable-free operation with power-efficient e-ink display.
- • **Smart Alerts & Color Coding:** Quickly identify air quality status with intuitive color bars and optional buzzer.
- • **Compact, Sleek & Travel-Ready:** Lightweight, pocket-sized design perfect for office, school, or on-the-go monitoring.
- • **Comprehensive App Integration:** Analyze 3 months of historical data with user-friendly graphs on your smartphone.
- • **Real-Time Air Quality Insights:** Monitor CO2, temperature, humidity & pressure instantly for a healthier workspace.

## Overview

The SAF Aranet4 Home is a wireless, battery-powered indoor air quality monitor that tracks CO2 levels, temperature, humidity, and atmospheric pressure in real-time. Featuring a power-efficient e-ink display with up to 4 years of battery life, it offers intuitive color-coded alerts and an optional buzzer for immediate feedback. Its companion app provides up to 90 days of historical data with easy-to-read graphs, empowering professionals to optimize ventilation and well-being in offices, schools, or homes. Compact and portable, it’s a top-rated, EU-made device trusted for precise NDIR sensor accuracy and seamless usability.

## Description

SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History: desertcart.com: Industrial & Scientific

Review: Important for Brain and Health - We have been using this carbon dioxide (CO₂) monitor for the past 18 months to check carbon dioxide levels in our home and work areas. CO₂ levels are a key measurement to assess the quality of indoor air and ventilation, which are important for minimizing the risk of virus transmission. One of the main reasons we bought it was to monitor how good the ventilation is in our indoor rooms. For example, in our home office, when the readings went up to 1,000+ ppm (parts per million), we noticed that our thinking slowed and we felt more sluggish. Decisions become more difficult to make. Apparently, our experiences match scientific studies that have proven that high levels of carbon dioxide can impair cognitive function and make it harder to think and be productive when CO₂ levels hit 1000 ppm and above. Thanks to this air quality monitor, we also noticed that if a second person enters a room, the CO₂ levels can increase quite rapidly just from our breathing. The CO₂ readings can sometimes double. We open a window to bring it back down to a good range. This monitor is small enough so that you can hold it in your palm and move it around easily. It looks both sleek and functional. Big bonus: it also provides temperature and humidity readings, and you can select either Fahrenheit or Celsius. To have all these readings all on one small device is very handy. It runs on two AA alkaline batteries, which are included. There is a helpful bar showing how much battery life is left. We have had our unit for 18 months, and after continuous use, we have not had to replace the batteries. The e-ink display digits are bright, easy to read, and large (roughly half an inch tall). The large digits and color bar allow you to quickly glance at the device from a distance and assess whether to take action to reduce CO₂ levels. There is an air quality bar that has three colors: green, yellow, and red. Each color corresponds to a different CO₂ level: green for normal (good), yellow for elevated (average), and red for high CO₂ levels (unhealthy). The second reason we purchased this monitor is to get an idea of how high the risk of respiratory virus exposure is. Higher CO₂ levels indicate poor ventilation, which can lead to higher airborne virus concentration. Scientists have found that people in a room with higher CO₂ levels are at a higher risk of virus infection than people in an identical room with lower CO₂ levels. Therefore, knowing when the CO₂ levels are high allows you to know when to reduce risk by opening windows to allow fresh air in, wearing a high-quality respirator mask, and/or reducing the time spent in that space. One feature we like is that you can use it with or without the app. So there is no pressure to use the app. Our only wish is that it came with a protective cover. In sum, this is a high-quality, reliable, and easy-to-use CO₂ monitor that allows you to continually assess air quality and ventilation. This was quite an investment, but well worth it. Highly recommended.
Review: After manual calibration, this is a very awesome battery-powered CO2 sensor - I've owned several CO2 sensors. In particular, I've had 2 Awair Glow units, 1 first-generation Awair unit, 1 second-generation Awair unit, and a TIM10 CO2 sensor. Of these sensors, the TIM10 is my "gold standard" sensor, but it has the very, very annoying property of requiring AC power. Aranet4 promised to be a battery-powered CO2 sensor that could output data to an app. It delivers, but it requires calibration out-of-the-box, in my opinion. Measured against known good sensors (particularly my TIM10), my Aranet4 sensor read about 75ppm higher than the environmental level out-of-the-box. The app warns you that performing calibration will permanently erase the factory calibration data, which is somewhat scary, but I did it anyway. In order to validate that the calibration was successful, I had my trusted TIM10 sensor outdoors, connected to AC power, out of the sun, with the Aranet4 directly next to it, on a substantially windy day with extremely good air quality (as measured by PM2.5 and PM10 presence from AirNow and Purple Air). The floor, outdoors, in this configuration, as read by the TIM10 unit, was 380ppm of CO2. Before calibration, in the same environment, Aranet4 reported 480ppm. After calibration, Aranet4 reported within 15ppm of TIM10, which I considered a success, particularly given the rarity of having such a low reading. All of the Awair units bottom out at 400ppm. Following calibration, for the last few weeks, I've kept an eye on Aranet4 and TIM10 when they've been in the same room. There's approximately a 10-15ppm disagreement between TIM10 and Aranet4, which I consider a very acceptable deviation given that Aranet4 is battery powered, and TIM10 is AC powered. On the app side, Aranet4 provides a serviceable iOS app. The iOS app itself is perfunctory. It provides graphing, exporting data (as csv, including CO2, pressure, humidity, temperature, and date of sample), and basic reporting features. It doesn't support dark mode, though, as an example of its perfunctory nature. The app developers didn't consider the performance impacts that storing all of the data would have on the graphing component, though, so the app gets laggier the more data the sensor measures. You're also only going to get a week of data for historical measurement. Other details are worth mentioning beyond the sensor accuracy and app integration, though. E-ink, as a display type, is just awesome. It looks very nice, aesthetically. Each refresh blanks the screen temporarily, though. Keep this in mind, if you decrease the measurement interval (you can measure as frequently as once per minute). Also, there's no backlight, which is why the battery life is good, but keep this in mind too, if you want to see it in the dark. I've taken this sensor on an airplane, and it works great there too. It's just an incredible sensor to have -- you can pocket it or bring it somewhere in a backpack and still have CO2 measurements, where most sensors can't go. For travel, or just in general, it's a great device to have. After calibration, it measures very accurately, and I'm happy with my purchase all around. However, I'd say calibration is mandatory. I've included a screenshot of a graph made from the CSV, as well as the CSV data from the unit itself.

## Features

- BREATHE EASILY: Aranet4 CO2 meter measures CO2 levels, temperature, relative humidity, and atmospheric pressure in real-time, empowering you to make informed decisions for healthy ventilation. No wonder it's the top-rated indoor air quality monitor in desertcart's CO2 monitor segment!
- CABLE-FREE: The power-efficient e-ink display guarantees an extended battery life of up to 4 years for this wireless air quality monitor, ensuring worry-free monitoring without the hassle of cables and cords.
- EASY-TO-USE: The color coding, prominent CO2 number on the display, and optional buzzer of this air quality meter alert you when the CO2 concentration becomes too high.
- FREE & INTERACTIVE APP: A smartphone application for viewing and analyzing up to 90 days of historical data from your indoor air quality meter, complete with user-friendly graphs.
- PREMIUM QUALITY: Aranet4 carbon dioxide detectors use nondispersive infrared sensor (NDIR) technology for the most precise and reliable CO2 measurements. Made in the European Union.
- ENJOY THE HEALTH BENEFITS: Air quality monitor indoor use helps people take better care of the atmosphere around them, leading to improved focus, mood, and overall well-being.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07YY7BH2W |
| Batteries | 2 AA batteries required. (included) |
| Best Sellers Rank | #4,230 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Indoor Air Quality Meters |
| Date First Available | July 18, 2019 |
| Item Weight | 3.67 ounces |
| Item model number | TDSPC003.001 |
| Language | English, Spanish |
| Manufacturer | SAF Tehnika |
| Product Dimensions | 2.76 x 2.76 x 0.94 inches |

## Product Details

- **Battery Description:** Alkaline
- **Brand:** SAF
- **Color:** White
- **Item Weight:** 104 Grams
- **Product Dimensions:** 2.76"W x 2.76"H

## Images

![SAF Aranet4 Home: Wireless Indoor Air Quality Monitor for Office or School (CO2, Temperature, Humidity and More) Portable, Battery Powered, E-Ink Screen, App for Configuration & Data History - Image 1](https://m.media-amazon.com/images/I/61EVDR3FJpL.jpg)

## Questions & Answers

**Q: Why do I need monitor CO2 concentration?**
A: High CO2 levels can negatively affect your well-being, comfort, and productivity. For example, if CO2 levels reach 1000 ppm, your cognitive abilities drop by 15%. At 1400 ppm and above, they decrease by a staggering 50%.

**Q: What is the NDIR sensor and why is it preferred over other types of sensors?**
A: Because it provides a higher precision than regular electrochemical sensors because CO2 is uniquely detectable with no interference from other gasses. Besides that the lifespan of the NDIR sensor is much longer and less recalibration is needed.

**Q: Why is Aranet4 considered the gold standard in CO2 monitoring?**
A: Aranet4 excels with multi-sensor accuracy, real-time alerts, app connectivity, and user-friendly design, highly praised by numerous satisfied customers.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Important for Brain and Health
*by R***R on December 24, 2025*

We have been using this carbon dioxide (CO₂) monitor for the past 18 months to check carbon dioxide levels in our home and work areas. CO₂ levels are a key measurement to assess the quality of indoor air and ventilation, which are important for minimizing the risk of virus transmission. One of the main reasons we bought it was to monitor how good the ventilation is in our indoor rooms. For example, in our home office, when the readings went up to 1,000+ ppm (parts per million), we noticed that our thinking slowed and we felt more sluggish. Decisions become more difficult to make. Apparently, our experiences match scientific studies that have proven that high levels of carbon dioxide can impair cognitive function and make it harder to think and be productive when CO₂ levels hit 1000 ppm and above. Thanks to this air quality monitor, we also noticed that if a second person enters a room, the CO₂ levels can increase quite rapidly just from our breathing. The CO₂ readings can sometimes double. We open a window to bring it back down to a good range. This monitor is small enough so that you can hold it in your palm and move it around easily. It looks both sleek and functional. Big bonus: it also provides temperature and humidity readings, and you can select either Fahrenheit or Celsius. To have all these readings all on one small device is very handy. It runs on two AA alkaline batteries, which are included. There is a helpful bar showing how much battery life is left. We have had our unit for 18 months, and after continuous use, we have not had to replace the batteries. The e-ink display digits are bright, easy to read, and large (roughly half an inch tall). The large digits and color bar allow you to quickly glance at the device from a distance and assess whether to take action to reduce CO₂ levels. There is an air quality bar that has three colors: green, yellow, and red. Each color corresponds to a different CO₂ level: green for normal (good), yellow for elevated (average), and red for high CO₂ levels (unhealthy). The second reason we purchased this monitor is to get an idea of how high the risk of respiratory virus exposure is. Higher CO₂ levels indicate poor ventilation, which can lead to higher airborne virus concentration. Scientists have found that people in a room with higher CO₂ levels are at a higher risk of virus infection than people in an identical room with lower CO₂ levels. Therefore, knowing when the CO₂ levels are high allows you to know when to reduce risk by opening windows to allow fresh air in, wearing a high-quality respirator mask, and/or reducing the time spent in that space. One feature we like is that you can use it with or without the app. So there is no pressure to use the app. Our only wish is that it came with a protective cover. In sum, this is a high-quality, reliable, and easy-to-use CO₂ monitor that allows you to continually assess air quality and ventilation. This was quite an investment, but well worth it. Highly recommended.

### ⭐⭐⭐⭐⭐ After manual calibration, this is a very awesome battery-powered CO2 sensor
*by L***S on April 14, 2022*

I've owned several CO2 sensors. In particular, I've had 2 Awair Glow units, 1 first-generation Awair unit, 1 second-generation Awair unit, and a TIM10 CO2 sensor. Of these sensors, the TIM10 is my "gold standard" sensor, but it has the very, very annoying property of requiring AC power. Aranet4 promised to be a battery-powered CO2 sensor that could output data to an app. It delivers, but it requires calibration out-of-the-box, in my opinion. Measured against known good sensors (particularly my TIM10), my Aranet4 sensor read about 75ppm higher than the environmental level out-of-the-box. The app warns you that performing calibration will permanently erase the factory calibration data, which is somewhat scary, but I did it anyway. In order to validate that the calibration was successful, I had my trusted TIM10 sensor outdoors, connected to AC power, out of the sun, with the Aranet4 directly next to it, on a substantially windy day with extremely good air quality (as measured by PM2.5 and PM10 presence from AirNow and Purple Air). The floor, outdoors, in this configuration, as read by the TIM10 unit, was 380ppm of CO2. Before calibration, in the same environment, Aranet4 reported 480ppm. After calibration, Aranet4 reported within 15ppm of TIM10, which I considered a success, particularly given the rarity of having such a low reading. All of the Awair units bottom out at 400ppm. Following calibration, for the last few weeks, I've kept an eye on Aranet4 and TIM10 when they've been in the same room. There's approximately a 10-15ppm disagreement between TIM10 and Aranet4, which I consider a very acceptable deviation given that Aranet4 is battery powered, and TIM10 is AC powered. On the app side, Aranet4 provides a serviceable iOS app. The iOS app itself is perfunctory. It provides graphing, exporting data (as csv, including CO2, pressure, humidity, temperature, and date of sample), and basic reporting features. It doesn't support dark mode, though, as an example of its perfunctory nature. The app developers didn't consider the performance impacts that storing all of the data would have on the graphing component, though, so the app gets laggier the more data the sensor measures. You're also only going to get a week of data for historical measurement. Other details are worth mentioning beyond the sensor accuracy and app integration, though. E-ink, as a display type, is just awesome. It looks very nice, aesthetically. Each refresh blanks the screen temporarily, though. Keep this in mind, if you decrease the measurement interval (you can measure as frequently as once per minute). Also, there's no backlight, which is why the battery life is good, but keep this in mind too, if you want to see it in the dark. I've taken this sensor on an airplane, and it works great there too. It's just an incredible sensor to have -- you can pocket it or bring it somewhere in a backpack and still have CO2 measurements, where most sensors can't go. For travel, or just in general, it's a great device to have. After calibration, it measures very accurately, and I'm happy with my purchase all around. However, I'd say calibration is mandatory. I've included a screenshot of a graph made from the CSV, as well as the CSV data from the unit itself.

### ⭐⭐⭐⭐⭐ Review
*by P***L on February 11, 2024*

Der CO2 Sensor ist gut und sicher verpackt. Macht einen wertigen Eindruck und sieht gut aus. Dank der Verwendung normaler Batterien und seiner geringen Größe kann man ihn einfach mal in ein anderes Zimmer stellen oder mitnehmen. Viele andere vergleichbare Geräte haben einen kurzzeitigen Akkubetrieb oder erfordern einen Netzanschluss. Die Bluetooth-Verbindung mit der zugehörigen App ging schnell und einfach. Die Verbindung ist stabil. Kein Re-Connect erforderlich wenn man zB außer Reichweite war. Die Anzeige am Gerät ist gut ablesbar. Meist schaue ich aber über die App, da hier auch der zeitliche Verlauf angezeigt wird. In der c‘t 27/2023 war ein Bericht über CO2 Messgeräte und der Aranet4 hat mich trotz des hohen Preises mein Interesse gefunden. Das hat sich im Betrieb bestätigt. Mit dem Gerät und der App bin ich sehr zufrieden. Was negativ zu erwähnen ist, ist die starke Preiserhöhung um €30 wohl zum Februar 2024. Ende Januar hab ich noch €179 bezahlt, aktuell kostet er €209. Versand kommt schnell aus Lettland (EU) mit €10 VK.

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-09*