---
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: "$287.31"
currency: USD
in_stock: true
reviews_count: 8
category: "Gain Express"
url: https://www.desertcart.us/products/25742880-portable-co2-meter-handheld-co2-detector-monitor-0-9999ppm-carbon
store_origin: US
region: United States of America
---

# 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:** $287.31
**Availability:** ✅ In Stock

## Summary

> 💨 Breathe Smart, Live Better — Your Portable Air Quality Guardian

## 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?** $287.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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

- • **Dual Power Flexibility:** Runs on included batteries or optional 9V adapter with automatic power switching for uninterrupted monitoring.
- • **Precision You Can Trust:** High-accuracy NDIR sensor delivers reliable CO2 readings from 0 to 9999ppm, ensuring your environment is always safe and ventilated.
- • **Portable & User-Friendly:** Lightweight handheld design with easy manual calibration and intuitive alarm function keeps you informed on the go.
- • **Versatile Application Ready:** Ideal for offices, classrooms, homes, and public spaces—stay ahead in maintaining healthy air quality wherever you are.
- • **All-in-One Air Quality Monitor:** Simultaneously tracks CO2, temperature, humidity, dew point, and wet bulb for a comprehensive indoor air snapshot.

## Overview

This handheld Portable CO2 Meter features a high-accuracy NDIR sensor measuring CO2 levels from 0 to 9999ppm with ±5-10% accuracy, alongside temperature (-10 to 60°C) and humidity (0.1% to 99.9% RH) monitoring. Designed for professionals and health-conscious users, it offers audible alarms, easy manual calibration, and dual power options, making it perfect for real-time indoor air quality assessment in offices, classrooms, and homes.

## 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: Quirky late 1980’s design aesthetic but it works - Indispensable instrument in this time of pandemic to ensure that your environment is adequately ventilated. I’m glad I bought this; my tightly sealed house had a reading of 1600 PPM CO2 and this meter clearly shows when the windows have been opened long enough to bring CO2 down to a healthier level of 600 to 800 ppm. Buy this if you want to look like a contractor. It’s ginormous and yelliw but actually light weight, especially for the size. C02 reading comes up in 30 seconds after a countdown; initial indoor relative humidity indoors after unit is outdoors takes a while to stabilize maybe ten or 15 minutes. The toggle between air, wet bulb, and dew point temperature is nice; kind of wish it also showed heat index. Now the bad: Terrible human factors design; without the manual you’d never figure this thing out - fortunately the tiny manual explains it all pretty well. Don’t lose the manual. Buttons are excessively debounced to the point that sometimes a button press isn’t recognized. A RS232 interface??? Stone age technology and forget about using your phone to log data. Alarm initially set to 1000 PPM probably isn’t a good choice; if you take this to your local grocery store or neighborhood bar or school or workplace and make a measurement that’s above this strict limit you’ll freak everyone out. It’s easily changed (but don’t forget the manual) I would buy this again. It works well. I like 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 | #48,513 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #89 in Indoor Air Quality Meters |
| Brand | Gain Express |
| Color | Yellow |
| Customer Reviews | 4.4 out of 5 stars 283 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

### ⭐⭐⭐⭐⭐ Quirky late 1980’s design aesthetic but it works
*by J***E on August 15, 2020*

Indispensable instrument in this time of pandemic to ensure that your environment is adequately ventilated. I’m glad I bought this; my tightly sealed house had a reading of 1600 PPM CO2 and this meter clearly shows when the windows have been opened long enough to bring CO2 down to a healthier level of 600 to 800 ppm. Buy this if you want to look like a contractor. It’s ginormous and yelliw but actually light weight, especially for the size. C02 reading comes up in 30 seconds after a countdown; initial indoor relative humidity indoors after unit is outdoors takes a while to stabilize maybe ten or 15 minutes. The toggle between air, wet bulb, and dew point temperature is nice; kind of wish it also showed heat index. Now the bad: Terrible human factors design; without the manual you’d never figure this thing out - fortunately the tiny manual explains it all pretty well. Don’t lose the manual. Buttons are excessively debounced to the point that sometimes a button press isn’t recognized. A RS232 interface??? Stone age technology and forget about using your phone to log data. Alarm initially set to 1000 PPM probably isn’t a good choice; if you take this to your local grocery store or neighborhood bar or school or workplace and make a measurement that’s above this strict limit you’ll freak everyone out. It’s easily changed (but don’t forget the manual) I would buy this again. It works well. I like 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 United States of America*
*Store origin: US*
*Last updated: 2026-02-19*