---
product_id: 76024794
title: "Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger"
brand: "extech"
price: "HK$5952"
currency: HKD
in_stock: true
category: "Extech"
url: https://www.desertcart.hk/products/76024794-extech-co250-portable-indoor-air-quality-co2-meter-datalogger
store_origin: HK
region: Hong Kong
---

# TWA & STEL exposure stats Battery-powered portability Multi-parameter sensing Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger

**Brand:** extech
**Price:** HK$5952
**Availability:** ✅ In Stock

## Summary

> 🌬️ Breathe smarter, work safer — the CO2 meter that keeps you ahead of the curve.

## Quick Answers

- **What is this?** Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger by extech
- **How much does it cost?** HK$5952 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/76024794-extech-co250-portable-indoor-air-quality-co2-meter-datalogger)

## 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

- • **Portable & Ready to Use:** Comes with 4 AA batteries included—monitor air quality anywhere, anytime.
- • **Smart Exposure Insights:** Instantly calculate 8-hour TWA and 15-minute STEL for workplace safety compliance.
- • **Compact & Lightweight Design:** At just 190g and 20cm tall, it fits perfectly in your professional toolkit.
- • **Trusted American Engineering:** Proudly made in the USA with reliable accuracy for critical indoor environments.
- • **Comprehensive Air Quality Monitoring:** Track CO2, temperature, humidity, dew point & wet bulb in one sleek device.

## Overview

The Extech CO250 is a portable indoor air quality meter and datalogger that measures CO2, temperature, humidity, dew point, and wet bulb. It calculates time-weighted averages (TWA) and short-term exposure limits (STEL) to help professionals maintain safe indoor environments. Powered by included AA batteries and designed for portability, it offers reliable, American-made precision in a compact form factor.

## Description

Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger : desertcart.in: Industrial & Scientific

## Features

- Measures carbon dioxide (CO2), temperature, humidity, dew point, and wet bulb
- Checks for carbon dioxide (co2) concentrations
- Calculates statistical weighted averages of TWA (8 hour time weighted average) and STEL (15 minute short term exposure limit)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0029V2GB4 |
| Are batteries included? | Yes |
| Batteries | 4 AA batteries required. (included) |
| Best Sellers Rank | #242,480 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #438 in Indoor Air Quality Meters #943 in Home Improvement Tools & Testers |
| Brand | Extech |
| Country of Origin | USA |
| Customer Reviews | 3.9 3.9 out of 5 stars (18) |
| Date First Available | 12 August 2012 |
| Item Dimensions LxWxH | 7 x 5.7 x 20 Centimeters |
| Item Height | 20 Centimeters |
| Item Weight | 190 g |
| Item Width | 5.7 Centimeters |
| Item model number | CO250 |
| Lithium Battery Packaging | Batteries contained in equipment |
| Lithium battery weight | 190 Grams |
| Manufacturer | Extech |
| Model number | CO250 |
| Number of Memory Sticks | 1 |
| Product Dimensions | 7 x 5.7 x 20 cm; 189.94 g |

## Images

![Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger - Image 1](https://m.media-amazon.com/images/I/41UYsXWlPqL.jpg)
![Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger - Image 2](https://m.media-amazon.com/images/I/314lncBCuqL.jpg)
![Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger - Image 3](https://m.media-amazon.com/images/I/71tSenpNJtL.jpg)

## Questions & Answers

**Q: Does it data logging? If so, how can the data is recovered?**
A: Built-in RS-232 interface for capturing readings on PC * Data acquisition software and cable included to record and document CO2, Humidity and Temperature data

**Q: Does it come with certificate of calibration?**
A: The standard calibration price is $195. and the option is NIST Certificate. this will add 1 week to your order.

**Q: If one does not pay to have it calibrated as in the other answer, how does the meter establish a baseline?**
A: Turn it on outside for baseline readings.

**Q: Can it be calibrated at a later date?**
A: Thank you for your question. The calibration for new item is made by the manufacturer, so it is not possible to set up the later date.

## Frequently Bought Together

- Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger
- Extech LT45 LED Light Meter

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**Shop now:** [https://www.desertcart.hk/products/76024794-extech-co250-portable-indoor-air-quality-co2-meter-datalogger](https://www.desertcart.hk/products/76024794-extech-co250-portable-indoor-air-quality-co2-meter-datalogger)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-08-22*