---
product_id: 205680453
title: "GAIN EXPRESS CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter"
brand: "gain express"
price: "฿20398"
currency: THB
in_stock: true
reviews_count: 7
category: "Gain Express"
url: https://www.desertcart.co.th/products/205680453-gain-express-co2-meter-handheld-co2-monitor-9999ppm-measuring-range
store_origin: TH
region: Thailand
---

# High precision NDIR sensor, 0-9999ppm range Audible alarm for preset CO2 thresholds Triple display: CO2, Temp, Humidity GAIN EXPRESS CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter

**Brand:** gain express
**Price:** ฿20398
**Availability:** ✅ In Stock

## Summary

> 🌬️ Breathe smarter, live better — the ultimate handheld air quality guardian!

## Quick Answers

- **What is this?** GAIN EXPRESS CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter by gain express
- **How much does it cost?** ฿20398 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/205680453-gain-express-co2-meter-handheld-co2-monitor-9999ppm-measuring-range)

## 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

- • **Data-Driven Insights:** Optional PC software enables real-time logging and analysis to optimize your indoor environment.
- • **Stay Alert, Stay Safe:** Customizable audible alarm instantly notifies you when CO2 levels spike beyond safe limits.
- • **Precision You Can Trust:** Stable NDIR sensor delivers ultra-accurate CO2 readings up to 9999ppm with 1ppm resolution.
- • **Versatile Power Options:** Use included batteries or plug in with a 9V adapter for uninterrupted monitoring anywhere.
- • **All-in-One Air Quality Dashboard:** Monitor CO2, temperature, and humidity simultaneously with crystal-clear triple displays.

## Overview

The GAIN EXPRESS CO2 Meter is a handheld, ergonomic device featuring a high-precision NDIR sensor that measures CO2 levels from 0 to 9999ppm with 1ppm resolution. It simultaneously displays temperature and humidity data, offers an audible alarm for preset CO2 thresholds, and supports battery or 9V adapter power. Optional PC connectivity allows for advanced data logging, making it ideal for home, lab, or professional indoor air quality monitoring.

## Description

GAIN EXPRESS CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter : desertcart.co.uk: DIY & Tools

Review: good quality - works well, but it is a bit pricey, though
Review: Gas equipment - Compact seems to work well I've only used 3 times

## Features

- Triple displays of CO2 level, Temperature (°F/ °C) and Humidity (Air, Wet Bulb, or Dew Point Info are all available)
- Stable NDIR Sensor for CO2 Detection. Ideal indoor air quality meter for home, laboratories, hotels, etc
- Sound Warning Alarm notifies operator when CO2 levels reach or exceed a preset threshold
- Power Supplied by Battery (Included) or 9V Adaptor . Optional Software CD for PC Connection Online Logging is also possible.
- Measuring Range:CO2: 0~9999ppm, Resolution : 1ppm,0.1°C/°F, 0.1%RH

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01966BZDY |
| Alarm | Audible |
| Best Sellers Rank | 344,809 in DIY & Tools ( See Top 100 in DIY & Tools ) 77 in CO2 Detectors 3,818 in Scanners & Testers |
| Brand | GAIN EXPRESS |
| Colour | Handheld Co2 Meter |
| Country of Origin | China |
| Customer Reviews | 4.5 4.5 out of 5 stars (272) |
| Item Weight | 200 Grams |
| Manufacturer | Gain Express Holdings Ltd. |
| Model Number | A017755 |
| Operating Humidity | 0-99 percent |
| Power source | Battery Powered |
| Product Style | Ergonomic |
| Sensor Type | Non Dispersive Infrared |
| UPC | 600316560665 |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 60 Degrees Celsius |

## Product Details

- **Alarm:** Audible
- **Brand:** GAIN EXPRESS
- **Colour:** Handheld Co2 Meter
- **Item weight:** 200 Grams
- **Number of items:** 1
- **Operating humidity:** 0-99 percent
- **Power source:** Battery Powered
- **Sensor type:** Non Dispersive Infrared
- **Style:** Ergonomic
- **Upper temperature rating:** 60 Degrees Celsius

## Images

![GAIN EXPRESS CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter - Image 1](https://m.media-amazon.com/images/I/71+eOoxRUgL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Does this detector require calibrating? is so how often and can it be done by user or does it have to be sent off?**
A: CO2 and RH can be calibrated by users,  users can calibrate by themselves if they feel that the readings are inaccurate or users may calibrate it every 2 to 3 months to ensure accuracy,  calibration steps can be found in the user manual.

## Customer Reviews

### ⭐⭐⭐⭐⭐ good quality
*by A***R on 23 September 2024*

works well, but it is a bit pricey, though

### ⭐⭐⭐⭐⭐ Gas equipment
*by P***S on 2 June 2024*

Compact seems to work well I've only used 3 times

### ⭐⭐⭐⭐⭐ Review
*by ピ***マ on 15 January 2026*

まだ使ってないが試したら使いやすそうだ

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.co.th/products/205680453-gain-express-co2-meter-handheld-co2-monitor-9999ppm-measuring-range](https://www.desertcart.co.th/products/205680453-gain-express-co2-meter-handheld-co2-monitor-9999ppm-measuring-range)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-27*