---
product_id: 673683
title: "Extech CO100 Air Quality Carbon Dioxide Monitor"
brand: "extech"
price: "A$225"
currency: AUD
in_stock: true
reviews_count: 11
category: "Extech"
url: https://www.desertcart.com.au/products/673683-extech-co100-air-quality-carbon-dioxide-monitor
store_origin: AU
region: Australia
---

# Accurate NDIR CO2 sensor User-set audible alarms Temp & Humidity sensing Extech CO100 Air Quality Carbon Dioxide Monitor

**Brand:** extech
**Price:** A$225
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Extech CO100 Air Quality Carbon Dioxide Monitor by extech
- **How much does it cost?** A$225 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/673683-extech-co100-air-quality-carbon-dioxide-monitor)

## Best For

- extech enthusiasts

## Why This Product

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

## Key Features

- • **Customizable Alerts:** Set high/low CO2 alarms to proactively maintain a healthy workspace environment.
- • **Compact & Plug-In Ready:** Sleek desktop design with universal AC adaptor keeps your air quality insights uninterrupted.
- • **Precision CO2 Monitoring:** Track indoor air quality from 0 to 9,999 ppm with lab-grade NDIR sensor accuracy.
- • **Maintenance-Free Reliability:** Durable sensor technology that requires zero upkeep, so you stay focused on what matters.
- • **Real-Time Air Quality Feedback:** Instant ppm display with clear Good/Normal/Poor air quality indicators for quick decisions.

## Overview

The Extech CO100 is a professional-grade indoor air quality monitor featuring a maintenance-free NDIR CO2 sensor that measures carbon dioxide levels from 0 to 9,999 ppm, alongside temperature and humidity. It offers user-programmable audible and visible alarms, real-time air quality status, and max/min CO2 recall, all housed in a compact desktop design powered via universal AC adaptor. Ideal for managers and professionals committed to optimizing indoor environments for health and productivity.

## Description

The CO100 is a desktop indoor air quality CO2 monitor that measures carbon dioxide concentrations (CO2) from 0 to 9,999ppm, air temperature and humidity. With user programmable visible and audible CO2 warning alarm. Meter has a maximum/minimum CO2 value recall function. Maintenance free NDIR (non-dispersive infrared) CO2 sensor. Complete with Universal AC adaptor.

Review: EXCELLENT! - Expensive but accurate! Reads correct temp within a degree. % humidity also seems accurate. GRATE to know (+ or - 75) CO2 reading is accurate. I recomend this to anyone that wants to know CO2 of indoor enviorment! Buy this NOT Acu Rite.
Review: Accurate, wish backlight would stay on - I have access to an industrial quality ambient CO2 meter and checked the CO100 against it, difference of 10ppm at 660ppm levels. I give this 4 stars because the backlight helps keep the rather dark LCD visible, and this is plug-in only. Why not have it possible to stay on? As well, unplugging it momentarily wipes the time and date setting, less of an issue but also not as satisfying

## Features

- Checks for Carbon Dioxide (CO2) concentrations
- User-adjustable high/low alarms
- Maintenance free NDIR (non-dispersive infrared) CO2 sensor
- Indoor Air Quality displayed in ppm with Good (0 to 800ppm), Normal (800 to 1200ppm), Poor (>1200ppm) indication

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007V580HW |
| Alarm | Audible |
| Batteries | 1 Product Specific batteries required. |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #536,670 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #733 in Indoor Air Quality Meters |
| Brand | Extech |
| Color | White |
| Customer Reviews | 4.0 4.0 out of 5 stars (18) |
| Date First Available | April 17, 2012 |
| Global Trade Identification Number | 00793950510001 |
| Included Components | Complete with Universal AC adaptor |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 8.4 ounces |
| Item model number | CO100 |
| Manufacturer | Extech |
| Number Of Pieces | 1 |
| Number of Items | 1 |
| Part Number | CO100 |
| Power Source | Battery Powered |
| Product Dimensions | 4.3"D x 4.1"W x 2.4"H |
| Sensor Type | Non Dispersive Infrared |
| Style | CO100 |
| UPC | 013088117959 793950510001 798256215568 |
| Usage | personal |
| Warranty Description | 2 years |

## Product Details

- **Alarm:** Audible
- **Brand:** Extech
- **Color:** White
- **Global Trade Identification Number:** 00793950510001
- **Item Weight:** 0.24 Kilograms
- **Number of Items:** 1
- **Power Source:** Battery Powered
- **Product Dimensions:** 4.3"D x 4.1"W x 2.4"H
- **Sensor Type:** Non Dispersive Infrared
- **Style:** CO100

## Images

![Extech CO100 Air Quality Carbon Dioxide Monitor - Image 1](https://m.media-amazon.com/images/I/81wnxO5fMGL.jpg)
![Extech CO100 Air Quality Carbon Dioxide Monitor - Image 2](https://m.media-amazon.com/images/I/81nyRCSKlRL.jpg)
![Extech CO100 Air Quality Carbon Dioxide Monitor - Image 3](https://m.media-amazon.com/images/I/610wO3c7HuL.jpg)
![Extech CO100 Air Quality Carbon Dioxide Monitor - Image 4](https://m.media-amazon.com/images/I/61yzUxbjSSL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ EXCELLENT!
*by J***R on October 22, 2012*

Expensive but accurate! Reads correct temp within a degree. % humidity also seems accurate. GRATE to know (+ or - 75) CO2 reading is accurate. I recomend this to anyone that wants to know CO2 of indoor enviorment! Buy this NOT Acu Rite.

### ⭐⭐⭐⭐ Accurate, wish backlight would stay on
*by S***A on February 16, 2023*

I have access to an industrial quality ambient CO2 meter and checked the CO100 against it, difference of 10ppm at 660ppm levels. I give this 4 stars because the backlight helps keep the rather dark LCD visible, and this is plug-in only. Why not have it possible to stay on? As well, unplugging it momentarily wipes the time and date setting, less of an issue but also not as satisfying

### ⭐⭐⭐ Three Stars
*by J***N on August 22, 2014*

turned out it was supposed to be carbon monoxide detectors, had to send these back.

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-02*