---
product_id: 489479229
title: "INKBIRDPLUS 6-in-1 Indoor Air Quality Monitor PTH-9A for Home Office School | Detects CO2, PM2.5, PM10, AQI, Temperature & Humidity with Alarm, Ideal for Rooms, Cellars, Grow Tents, Hospital, Anywhere"
brand: "inkbirdplus"
price: "€ 117.25"
currency: EUR
in_stock: true
reviews_count: 13
category: "Inkbirdplus"
url: https://www.desertcart.hr/products/489479229-inkbirdplus-6-in-1-indoor-air-quality-monitor-pth-9a
store_origin: HR
region: Croatia
---

# Auto CO2 calibration mode 3-stage AQI alarm system 6-in-1 multi-sensor tech INKBIRDPLUS 6-in-1 Indoor Air Quality Monitor PTH-9A for Home Office School | Detects CO2, PM2.5, PM10, AQI, Temperature & Humidity with Alarm, Ideal for Rooms, Cellars, Grow Tents, Hospital, Anywhere

**Brand:** inkbirdplus
**Price:** € 117.25
**Availability:** ✅ In Stock

## Summary

> 🌬️ Breathe smarter, live better — your air’s new best friend!

## Quick Answers

- **What is this?** INKBIRDPLUS 6-in-1 Indoor Air Quality Monitor PTH-9A for Home Office School | Detects CO2, PM2.5, PM10, AQI, Temperature & Humidity with Alarm, Ideal for Rooms, Cellars, Grow Tents, Hospital, Anywhere by inkbirdplus
- **How much does it cost?** € 117.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/489479229-inkbirdplus-6-in-1-indoor-air-quality-monitor-pth-9a)

## Best For

- inkbirdplus enthusiasts

## Why This Product

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

## Key Features

- • **Instant AQI Alerts:** Stay ahead with a smart 3-level AQI alarm that buzzes when air quality dips below safe levels.
- • **Auto CO2 Calibration:** Ensure precision with a built-in automatic CO2 calibration mode for reliable, real-time readings.
- • **Vibrant Color LED Display:** Backlit screen with intuitive color codes and time/date display keeps you informed day and night.
- • **Flexible Placement & Design:** Compact, modern design with wall-mount or tabletop options fits seamlessly into any professional or home environment.
- • **Comprehensive 6-in-1 Detection:** Monitor CO2, PM2.5, PM10, AQI, temperature, and humidity simultaneously for total indoor air insight.

## Overview

The INKBIRDPLUS PTH-9A is a cutting-edge 6-in-1 indoor air quality monitor designed for professionals and health-conscious millennials. It accurately tracks CO2, PM2.5, PM10, AQI, temperature, and humidity, featuring a color-coded LED display and a 3-stage AQI alarm to alert you when air quality worsens. With automatic CO2 calibration and versatile mounting options, it empowers you to optimize your environment—whether at home, office, or grow tent—ensuring you never miss a beat on your indoor air health.

## Description

Product Description 6 In 1 Air Quality Monitor PTH-9A is a multifunctional air quality monitor that simultaneously detects carbon dioxide concentration, temperature, humidity, AQI (Air Quality Index), and PM2.5 (Particulate Matter),PM10. With its help, we can clearly understand the air quality of our living environment. Backlit screen The air quality monitor with smart color display points to different color areas depending on the level of the air quality index, so you can easily keep track of the current status of the air quality. With the backlit display, you can check the air quality even in the dark with large and clear readings. AQI Alarm When the AQI exceeds 100 and the buzzer is on, the buzzer will sound an alarm. At this time, press and hold the "+" button to abort the alarm. We can see three different facial indicators on the screen, corresponding to the three stages of the AQI. Green represents the good stage (0-50), yellow represents the normal stage (51-100) and red represents the bad stage (101-500) Hang and Place Two possible uses: Wall mounting or tabletop version. You can put it on a stand or attach it to the wall by means of a mounting hole on the back side to the wall. Just choose the mounting method you prefer. With its help, we can maintain the best air quality in grow tents, wine cellars, cars, offices and so on. Calibration Mode In the off state, take the product to a ventilated place and press and hold three keys at the same time, then the product will enter the automatic calibration state of CO2 concentration value for 200 seconds; during the period, make sure no one is near to avoid interference with the calibration. °C & °F Conversion Single click the turn on /off ”+“ button to switch °C & °F models. Long press it to turn on or off the buzzer. Press the RESET key with a single press using a pointed object while powered on to achieve a reset. Time Setting Press the "-" key to switch the time, date and year, press the power button twice to enter the setting mode, the setting order is year, date to time, press the power button to confirm each setting, and enter the next setting item.

Review: A vital device to see what our eyes cant see - why did i buy this: i do a lot of WFH and realized i get too tired and exhausted after just a hour. Dk why i bought this and found out that CO2 accumulation was way outta normal levels in my room due to poor ventilation. now i remedied the CO2 issue and also found out that my DIY air purifier works really well. normal AQI is around 70-80 normally in my region. Features and good experience with this product : built in battery lasts for a day but this device is designed to be connected to power at all times. CO2 measurement can be calibrated and is set to off by default built like a brick which i honestly did not expect measurements respond pretty fast to changes which i really appreciate. has a smoke alarm kinda feature where if AQI crosses 100 it beeps. looks nice in my room. The cons and bad experience. backlight is not bright enough experienced a glitch where CO2 ppm was stuck at 500 had to reset the device i wish it lasted atleast for months before charging if there is bad ventilation temperature reading is unreliable Something i want to say: i read a lot of reviews before buying this product and it seems like the seller is listening to feedback and fixing a lot of issues users experienced my experience till date is almost flawless except the problems mentioned above. which is also something i didnt expect. i expect this thing to last atleast 3 years or so and if it fails i will update my review as this one is not cheap at all atleast for me. overall i can confidently recommend this product if you can accept the shortcomings mentioned above
Review: Does not charge properly - The charger does not work at all well! I have replaced 2 and neither would charge properly. Since one cannot use batteries, charging is the only way to use it. Finally the price is far too high for something that does not work well!!

## Features

- Please note that Only products purchased at INKBIRD stores can enjoy INKBIRD's official after-sales service. We do not authorize any store to sell INKBIRD products.
- 6-in-1 Air Quality Monitor: INKBIRDPLUS 6-in-1 Indoor Monitor has built-in professional detection sensors, it can accurately detect the current CO2 concentration, PM2.5, PM10, AQI, temperature, and humidity in the air.
- Three AQI Stages & Sound Alarm: This Air Quality detector is designed with 3 stages of AQI - normal mode (0-50), warning mode (51-100), and danger mode (101-500). When the AQI index exceeds 100, the detector will sound an alarm.
- Calibration Function: After the device is turned off, take it to a ventilated place, and press and hold the three keys at the same time, the product will enter the automatic calibration state of carbon dioxide concentration value for 200 seconds.
- Color LED Screen: The color display with backlight makes each value clear at a glance, and you can also check the time/date/year on the detector. This air quality meter also supports setting the current time, C°/F° switching.
- Wide Application: This portable detector can detect air quality in bedrooms, living rooms, kitchens, cellars, cars, grow tents and more. With a hook design, it can be placed on the desktop or hung on the wall for easy viewing, is an ideal indoor air quality detector for our lives.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B7QG8D8R |
| Best Sellers Rank | #8,042 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Indoor Air Quality Meters |
| Brand | INKBIRDPLUS |
| Brand Name | INKBIRDPLUS |
| Country of Origin | China |
| Customer Reviews | 3.3 out of 5 stars 270 Reviews |
| Included Components | Indoor CO2 Detector |
| Item Dimensions | 12 x 8 x 4 Centimeters |
| Item Weight | 0.67 Pounds |
| Item dimensions L x W x H | 12 x 8 x 4 Centimeters |
| Manufacturer | INKBIRDPLUS |
| Model Number | PTH-9A Indoor Air Quality Monitor |
| Number of Items | 1 |
| Part Number | PTH-9A-US |
| Style | Modern |
| Style Name | Modern |
| Unit Count | 1.00 Count |

## Product Details

- **Alarm:** Audible
- **Brand:** INKBIRDPLUS
- **Colour:** Black
- **Item Weight:** 0.67 Pounds
- **Number of Items:** 1
- **Operating Humidity:** 95 percent
- **Power Source:** बटरी सचालित
- **Product Dimensions:** 4D x 8.9W x 9.9H Centimeters
- **Sensor Type:** Electrochemical
- **Style:** Modern

## Images

![INKBIRDPLUS 6-in-1 Indoor Air Quality Monitor PTH-9A for Home Office School | Detects CO2, PM2.5, PM10, AQI, Temperature & Humidity with Alarm, Ideal for Rooms, Cellars, Grow Tents, Hospital, Anywhere - Image 1](https://m.media-amazon.com/images/I/71EUPB2LMQL.jpg)
![INKBIRDPLUS 6-in-1 Indoor Air Quality Monitor PTH-9A for Home Office School | Detects CO2, PM2.5, PM10, AQI, Temperature & Humidity with Alarm, Ideal for Rooms, Cellars, Grow Tents, Hospital, Anywhere - Image 2](https://m.media-amazon.com/images/I/71PkOq3vhYL.jpg)
![INKBIRDPLUS 6-in-1 Indoor Air Quality Monitor PTH-9A for Home Office School | Detects CO2, PM2.5, PM10, AQI, Temperature & Humidity with Alarm, Ideal for Rooms, Cellars, Grow Tents, Hospital, Anywhere - Image 3](https://m.media-amazon.com/images/I/71oTmjJSpGL.jpg)
![INKBIRDPLUS 6-in-1 Indoor Air Quality Monitor PTH-9A for Home Office School | Detects CO2, PM2.5, PM10, AQI, Temperature & Humidity with Alarm, Ideal for Rooms, Cellars, Grow Tents, Hospital, Anywhere - Image 4](https://m.media-amazon.com/images/I/71nIJ8rPRSL.jpg)
![INKBIRDPLUS 6-in-1 Indoor Air Quality Monitor PTH-9A for Home Office School | Detects CO2, PM2.5, PM10, AQI, Temperature & Humidity with Alarm, Ideal for Rooms, Cellars, Grow Tents, Hospital, Anywhere - Image 5](https://m.media-amazon.com/images/I/71d8qOx2l4L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ A vital device to see what our eyes cant see
*by H***S on 6 January 2024*

why did i buy this: i do a lot of WFH and realized i get too tired and exhausted after just a hour. Dk why i bought this and found out that CO2 accumulation was way outta normal levels in my room due to poor ventilation. now i remedied the CO2 issue and also found out that my DIY air purifier works really well. normal AQI is around 70-80 normally in my region. Features and good experience with this product : built in battery lasts for a day but this device is designed to be connected to power at all times. CO2 measurement can be calibrated and is set to off by default built like a brick which i honestly did not expect measurements respond pretty fast to changes which i really appreciate. has a smoke alarm kinda feature where if AQI crosses 100 it beeps. looks nice in my room. The cons and bad experience. backlight is not bright enough experienced a glitch where CO2 ppm was stuck at 500 had to reset the device i wish it lasted atleast for months before charging if there is bad ventilation temperature reading is unreliable Something i want to say: i read a lot of reviews before buying this product and it seems like the seller is listening to feedback and fixing a lot of issues users experienced my experience till date is almost flawless except the problems mentioned above. which is also something i didnt expect. i expect this thing to last atleast 3 years or so and if it fails i will update my review as this one is not cheap at all atleast for me. overall i can confidently recommend this product if you can accept the shortcomings mentioned above

### ⭐ Does not charge properly
*by A***R on 14 February 2026*

The charger does not work at all well! I have replaced 2 and neither would charge properly. Since one cannot use batteries, charging is the only way to use it. Finally the price is far too high for something that does not work well!!

### ⭐⭐⭐ Good product but don't buy for humidity and temperature.
*by A***L on 11 December 2024*

Seems accurate reading. Only cons is beep sound everytime when aqi crosses 100. I have to off beep sound everytime with pressing (+) sign. Temperature and humidity sensor is inconsistent and sometimes incorrect. Reading jumps from 46% to 54% directly and 25% to 32% directly of humidity and temperature jumps directly from 23°c to 25°c. So don't buy for humidity and temperature sensor.

## Frequently Bought Together

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-04*