---
product_id: 25742880
title: "Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm, Carbon Dioxide Meter with Alarm Function, Temperature & Humidity Meter NDIR Sensor Air Quality Monitor for Home Trip Classroom and Office"
brand: "gain express"
price: "€ 256.36"
currency: EUR
in_stock: true
reviews_count: 8
category: "Gain Express"
url: https://www.desertcart.hr/products/25742880-portable-co2-meter-handheld-co2-detector-monitor-0-9999ppm-carbon
store_origin: HR
region: Croatia
---

# Humidity 0.1~99.9% ±3%RH CO2 range 0~9999ppm ±5-10% Temp range -10~60°C ±0.6°C Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm, Carbon Dioxide Meter with Alarm Function, Temperature & Humidity Meter NDIR Sensor Air Quality Monitor for Home Trip Classroom and Office

**Brand:** gain express
**Price:** € 256.36
**Availability:** ✅ In Stock

## Summary

> 🌬️ Breathe smarter, work sharper — never miss a breath of fresh air!

## Quick Answers

- **What is this?** Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm, Carbon Dioxide Meter with Alarm Function, Temperature & Humidity Meter NDIR Sensor Air Quality Monitor for Home Trip Classroom and Office by gain express
- **How much does it cost?** € 256.36 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/25742880-portable-co2-meter-handheld-co2-detector-monitor-0-9999ppm-carbon)

## Best For

- gain express enthusiasts

## Why This Product

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

## Key Features

- • **Precision You Can Trust:** High-accuracy NDIR sensor ensures reliable CO2 readings from 0 to 9999ppm, keeping your environment safe and clear-headed.
- • **Portable & User-Friendly:** Compact handheld design with easy manual calibration and dual power options—perfect for on-the-go professionals.
- • **All-in-One Air Quality Insight:** Monitors CO2, temperature, humidity, dew point, and wet bulb for a comprehensive snapshot of your indoor air health.
- • **Instant Alerts for Safer Spaces:** Built-in audible alarm warns you when CO2 levels spike, so you can act fast and maintain optimal air quality.
- • **Versatile for Every Environment:** Ideal for offices, classrooms, homes, and trips—join the smart crowd prioritizing wellness and productivity.

## Overview

This Portable CO2 Meter features a high-precision NDIR sensor measuring CO2 levels from 0 to 9999ppm with ±5-10% accuracy, alongside temperature (-10 to 60°C) and humidity (0.1-99.9% RH) monitoring. Its compact handheld design includes an audible alarm for elevated CO2, manual calibration, and dual power options, making it an essential tool for maintaining healthy indoor air quality in professional and personal spaces.

## Description

Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm, Carbon Dioxide Meter with Alarm Function, Temperature & Humidity Meter NDIR Sensor Air Quality Monitor for Home Trip Classroom and Office: desertcart.com: Industrial & Scientific

Review: Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm - Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm Product arrived quickly and was brand new. I put in the 4 batteries and hit the top left start button, and it fired right up. This CO2 detector is a game changer. I thought the office had a Carbon Monoxide problem. After buying a expensive CO detector [everyone should have a CO detector of some type] I found out with this device it was CO2 that was the problem. The room was running at 800 ppm to 900 ppm and thats when a absolute brain fog would hit. We ended opening up some windows limiting the use of the gas stove and brought in fans for circulation. The PPM is now about 500 ppm sometimes around 430 ppm which is a huge difference. I have not messed with any of the setting so far no need to. Overall excellent product! If you are having a brain fog or feel a little strange and lethargic in the house/room or office it may be high CO2 levels. This device will help determine if that is the issue, and hopefully help you solve it.
Review: Good quality and durable - We've bought several of these over the years and they are workhorses. Alway work, battery lasts forever, accurate and consistent.

## Features

- HIGH ACCURACY: CO2 Accuracy 0~2000ppm(±50ppm or ±5% of the reading); 2000~9999ppm(±10% of the reading)
- LARGE MEASURING RANGE: CO2: 0~9999ppm ; Temperature: -10~60°C(Accuracy ±0.6°C) ; Humidity: 0.1% ~ 99.9%RH(Accuracy ±3%RH) ; Dew Point: -20.0~59.9°C ; Wet Bulb: -5.0~59.9°C
- USER FRIENDLY: Portable Handle Design; Easily manual calibration on CO2 and humidity; Stable NDIR CO2 sensor
- POWER SUPPLY: Dual power source battery (included) or 9V adaptor (NOTED: adaptor is not included in set); Power from battery is automatically cut off when 9V adaptor is in use
- APPLICATION: IAQ monitoring and survey; especially on CO2 level and air ventilation become widely applied in public areas such as offices; classrooms; factories; hospitals and hotels

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01966BZDY |
| Alarm | Audible |
| Best Sellers Rank | #74,171 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #86 in Indoor Air Quality Meters |
| Brand | Gain Express |
| Color | Yellow |
| Customer Reviews | 4.5 out of 5 stars 287 Reviews |
| Item Weight | 200 Grams |
| Manufacturer | Gain Express Holdings Ltd |
| Model Number | A017755 |
| Operating Humidity | 99 9 percent |
| Power Source | Battery Powered |
| Product Style | Digital CO2 Meter |
| Style | Digital CO2 Meter |
| UPC | 600316560665 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 60 Degrees Celsius |

## Product Details

- **Alarm:** Audible
- **Brand:** Gain Express
- **Color:** Yellow
- **Item Weight:** 200 Grams
- **Manufacturer:** Gain Express Holdings Ltd
- **Operating Humidity:** 99 9 percent
- **Power Source:** Battery Powered
- **Style:** Digital CO2 Meter
- **UPC:** 600316560665
- **Upper Temperature Rating:** 60 Degrees Celsius

## Images

![Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm, Carbon Dioxide Meter with Alarm Function, Temperature & Humidity Meter NDIR Sensor Air Quality Monitor for Home Trip Classroom and Office - Image 1](https://m.media-amazon.com/images/I/71+eOoxRUgL.jpg)

## Questions & Answers

**Q: Can you connect a hose for scientific experiments?**
A: No.

**Q: what is the country of origin?**
A: Made it China, but it seems to be an accurate measurement.

**Q: Do you sell the software and hardware for data collection separately for this unit?**
A: Yes, you can buy the software and cable from the link below.

ASIN: B01BWJIRMK
URL: https://www.amazon.com/dp/B01BWJIRMK?ref=myi_title_dp

**Q: How accurate is the co2 sensor?**
A: Very

## Customer Reviews

### ⭐⭐⭐⭐⭐ Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm
*by S***8 on March 27, 2026*

Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm Product arrived quickly and was brand new. I put in the 4 batteries and hit the top left start button, and it fired right up. This CO2 detector is a game changer. I thought the office had a Carbon Monoxide problem. After buying a expensive CO detector [everyone should have a CO detector of some type] I found out with this device it was CO2 that was the problem. The room was running at 800 ppm to 900 ppm and thats when a absolute brain fog would hit. We ended opening up some windows limiting the use of the gas stove and brought in fans for circulation. The PPM is now about 500 ppm sometimes around 430 ppm which is a huge difference. I have not messed with any of the setting so far no need to. Overall excellent product! If you are having a brain fog or feel a little strange and lethargic in the house/room or office it may be high CO2 levels. This device will help determine if that is the issue, and hopefully help you solve it.

### ⭐⭐⭐⭐⭐ Good quality and durable
*by C***T on August 24, 2024*

We've bought several of these over the years and they are workhorses. Alway work, battery lasts forever, accurate and consistent.

### ⭐⭐⭐⭐ Works. Instructions are clear.
*by A***T on December 17, 2025*

Used to measure CO2 ppm in a space heated by kerosene. The meter instructions says it is factory calibrated at 400 ppm. It read 432 in the outside air. I don't understand people's issues with the manual. It is easy to read. The calibration instructions are clear but yes you do need the manual. I have not check the accuracy with test gas as those test cylinders are ~ $200. Regarding the calibration procedure and for the fear of losing the manual. Take a picture of that paragraph and put it in the case. Potential problem addressed.

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-04-25*