---
product_id: 359295406
title: "Aranet4 Home Wireless Indoor Air Quality Sensor for Home, Office or School [CO2, Temperature, Humidity and More] Portable"
brand: "saf"
price: "HK$2831"
currency: HKD
in_stock: true
reviews_count: 13
category: "Saf"
url: https://www.desertcart.hk/products/359295406-aranet4-home-wireless-indoor-air-quality-sensor-for-home-office
store_origin: HK
region: Hong Kong
---

# Wireless Connectivity Long-lasting Battery Life Real-time Temp Monitoring Aranet4 Home Wireless Indoor Air Quality Sensor for Home, Office or School [CO2, Temperature, Humidity and More] Portable

**Brand:** saf
**Price:** HK$2831
**Availability:** ✅ In Stock

## Summary

> 🌬️ Elevate your air IQ — because fresh air is the new luxury.

## Quick Answers

- **What is this?** Aranet4 Home Wireless Indoor Air Quality Sensor for Home, Office or School [CO2, Temperature, Humidity and More] Portable by saf
- **How much does it cost?** HK$2831 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/359295406-aranet4-home-wireless-indoor-air-quality-sensor-for-home-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

- • **Precision You Can Trust:** NDIR sensor technology delivers the most accurate CO2 readings on the market.
- • **Breathe Smarter, Live Better:** Instant CO2, humidity & air pressure insights keep your environment optimized.
- • **Track Trends with 90-Day History:** Smartphone app lets you analyze air quality patterns and make informed decisions.
- • **E-Ink Display for Ultra Efficiency:** Low power consumption means your sensor stays active longer without frequent battery changes.
- • **Color-Coded Alerts for Peace of Mind:** Visual and buzzer warnings ensure you never miss unhealthy air spikes.

## Overview

The Aranet4 Home is a portable, wireless indoor air quality sensor designed for homes, offices, and schools. It monitors CO2, temperature, humidity, and air pressure in real time using advanced NDIR sensor technology. Featuring a power-efficient E-Ink display and color-coded alerts with an optional buzzer, it ensures you stay informed about your environment’s health. The companion smartphone app provides up to 90 days of historical data for trend analysis, all powered by long-lasting AA batteries.

## Description

Aranet4 Home Wireless Indoor Air Quality Sensor for Home, Office or School [CO2, Temperature, Humidity and More] Portable : desertcart.co.uk: Business, Industry & Science

Review: Its good - Was looking for a CO2 monitor for some time and this does the job nicely. Being portable means I can have it in my study while I work or move it to the bedroom while I sleep, readings correlate pretty well with when I'm feeling groggy from being in the same room too long without opening a window and it has helped me feel clearer headed. The eink display is pretty easy to read and should mean the battery doesnt drain too fast, It transmits its updates over BLE meaning homeassistant picked it up immediately without needing to be paired. App is straightforward and allows you to adjust a couple of settings as well as update the firmware. And it works locally so no accounts needed for the device or app.
Review: Excellent home CO2 monitor - I picked this up on somewhat of a whim, I read a number of online reviews and it was credited as a very good device but pricy. I have to say it's worth it though. The Bluetooth linking and data storing works really well, I can leave it in-situ for a day or two and then come back and pick up the data to show the trends. Battery life seems excellent (can't comment yet given it's designed to be months to a year) and the unit is ideal sized. I'll admit that it feels somewhat fragile, but then again do you really want to be slinging something like this around. No hesitation, glad I picked it up.

## Features

- The perfect companion for indoor use, allows you to monitor CO2 content, temperature, relative humidity and air pressure in real time
- Easy for everyone to use – the colour coding and the optional buzzer warns you when the CO2 concentration becomes too high
- The energy-efficient E-Ink display ensures a particularly long battery life of the radio
- Smartphone app for viewing and analyzing historical data up to 90 days history
- Uses non-dispersive infrared sensor technology (NDIR) for the most accurate and reliable CO2 readings

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07YY7BH2W |
| Batteries | 2 AA batteries required. (included) |
| Best Sellers Rank | 6,240 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 6 in Airflow & Air Quality |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,816) |
| Date First Available | 18 July 2019 |
| Guaranteed software updates until | unknown |
| Item model number | TDSPC003.001 |
| Language | English, Spanish |
| Manufacturer | SAF Tehnika |
| Part number | TDSPC0H3.002 |
| Power source type | Battery Powered |
| Product Dimensions | 7.01 x 7.01 x 2.39 cm; 104 g |

## Product Details

- **Colour:** white
- **Brand:** SAF
- **Product dimensions:** 7W x 2.4H centimetres
- **Item weight:** 104 Grams
- **Battery description:** Alkaline

## Images

![Aranet4 Home Wireless Indoor Air Quality Sensor for Home, Office or School [CO2, Temperature, Humidity and More] Portable - Image 1](https://m.media-amazon.com/images/I/7130x+9GCXL.jpg)

## Questions & Answers

**Q: Is this product easy to use anywhere?**
A: The Aranet4 HOME is wireless and portable, running on batteries for up to 4 years. Its compact size lets you carry it anywhere — home, office, or school — with no cables needed.

**Q: What sensor technology is used to measure CO2?**
A: The Aranet4 HOME uses NDIR (nondispersive infrared) sensor technology to deliver precise, reliable CO2 readings — one of the most accurate methods available for indoor air quality monitoring.

**Q: Is there an app to go along with the monitor?**
A: Yes! Download the free smartphone app to view real-time readings, adjust monitor settings.

**Q: How much data history does the app store?**
A: The free smartphone app stores up to 90 days of data history, so you can review trends and track air quality changes over time with easy-to-read graphs.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Its good
*by J***N on 29 August 2024*

Was looking for a CO2 monitor for some time and this does the job nicely. Being portable means I can have it in my study while I work or move it to the bedroom while I sleep, readings correlate pretty well with when I'm feeling groggy from being in the same room too long without opening a window and it has helped me feel clearer headed. The eink display is pretty easy to read and should mean the battery doesnt drain too fast, It transmits its updates over BLE meaning homeassistant picked it up immediately without needing to be paired. App is straightforward and allows you to adjust a couple of settings as well as update the firmware. And it works locally so no accounts needed for the device or app.

### ⭐⭐⭐⭐⭐ Excellent home CO2 monitor
*by A***C on 24 September 2023*

I picked this up on somewhat of a whim, I read a number of online reviews and it was credited as a very good device but pricy. I have to say it's worth it though. The Bluetooth linking and data storing works really well, I can leave it in-situ for a day or two and then come back and pick up the data to show the trends. Battery life seems excellent (can't comment yet given it's designed to be months to a year) and the unit is ideal sized. I'll admit that it feels somewhat fragile, but then again do you really want to be slinging something like this around. No hesitation, glad I picked it up.

### ⭐⭐⭐⭐⭐ You get what you pay for
*by E***N on 20 October 2023*

I've never seen an app for a connected device that's this good. - The app reliably takes only 3 seconds to sync sensor data with the device. Zero connection issues, no faffing about with toggling Bluetooth on/off, it just works, every time. - Easy to use and graphs for CO2, temperature, humidity, and atmospheric pressure. - Everything about the app interface is polished. Setup, firmware updates, regular usage, power-user features, you name it. - The sensor data can be trivially exported in a plain text format. Cons: - To update, the e-ink display needs to flash the entire screen black for a second, it's distracting if the device is within your field of view. - The display does not have any backlight, so to view it in a dark environment you need to either shine light at it or use the phone app.

## Frequently Bought Together

- 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
- SAF Aranet Radon Detector for Home: 10-Min Measurement, Temperature, Relative Humidity, Pressure, E-Ink Display, 7-Year Battery, Portable with Free App, Bq/m3 & pCi/L Selectable

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-11-06*