Does it data logging? If so, how can the data is recovered?

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

Does it come with certificate of calibration?

The standard calibration price is $195. and the option is NIST Certificate. this will add 1 week to your order.

If one does not pay to have it calibrated as in the other answer, how does the meter establish a baseline?

Turn it on outside for baseline readings.

Can it be calibrated at a later date?

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.

Extech Co250 Portable Indoor Air Quality Co2 Meter Datalogger

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

₩954659

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

Description

🌬️ Breathe smarter, work safer — the ultimate air quality sidekick.

VERSATILE USE CASES - Ideal for offices, classrooms, labs, factories, greenhouses, and HVAC inspections where air quality matters most.
DATA DRIVEN DECISIONS - Stores up to 99 data sets to track trends, ensure workplace safety, and maintain compliance effortlessly.
ON THE GO CONVENIENCE - Compact, lightweight design with large backlit LCD and intuitive keypad—perfect for busy professionals in the field.
PRECISION CO₂ TRACKING - Advanced NDIR sensor delivers accurate readings from 0 to 5,000 ppm for trusted indoor air quality insights.
COMPREHENSIVE ENVIRONMENTAL MONITORING - Simultaneously measures temperature, humidity, dew point, and wet bulb for a full-spectrum indoor assessment.

The Extech CO250 is a portable, battery-powered indoor air quality meter featuring an advanced NDIR CO₂ sensor with a 0-5,000 ppm range. It simultaneously tracks temperature, humidity, dew point, and wet bulb, storing up to 99 readings for trend analysis. Designed for professionals, its compact form and backlit display make it ideal for HVAC, workplace safety, and environmental monitoring across diverse indoor settings.

Specifications

ASIN	B0029V2GB4
Batteries	4 AA batteries required. (included)
Battery type	Alkaline
Color Name	Black
Customer Reviews	3.9 3.9 out of 5 stars (18)
Date First Available	12 August 2012
Item Weight	190 g
Item model number	CO250
Material Type	ABS
Power Source	Corded Electric
Product Dimensions	7 x 5.7 x 20 cm; 189.94 g

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.