---
product_id: 33107348
title: "CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room"
brand: "tekcoplus"
price: "€ 273.61"
currency: EUR
in_stock: true
reviews_count: 8
category: "Tekcoplus"
url: https://www.desertcart.sk/products/33107348-co2-meter-portable-co2-detector-digital-co2-monitor-with-alarm
store_origin: SK
region: Slovakia
---

# 0-9999ppm CO2 range Audible + visual alarm 14°F-140°F temp range CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room

**Brand:** tekcoplus
**Price:** € 273.61
**Availability:** ✅ In Stock

## Summary

> 🌬️ Breathe smarter, live better — your air quality watchdog!

## Quick Answers

- **What is this?** CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room by tekcoplus
- **How much does it cost?** € 273.61 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/33107348-co2-meter-portable-co2-detector-digital-co2-monitor-with-alarm)

## Best For

- tekcoplus enthusiasts

## Why This Product

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

## Key Features

- • **Versatile & Portable:** Compact, battery-powered design fits perfectly in offices, homes, classrooms, and grow rooms.
- • **Real-Time Air Insights:** Simultaneously monitor CO2, temperature, and humidity on a large backlit LCD for instant clarity.
- • **Precision that Protects:** High-accuracy NDIR sensor ensures reliable CO2 readings within ±5% for safer indoor air.
- • **Instant Alerts, Instant Action:** Audible and visual alarms trigger when CO2 levels exceed your set threshold—never miss a warning.
- • **Comprehensive Environmental Monitoring:** Tracks dew point and wet bulb temperatures for advanced air quality analysis beyond CO2.

## Overview

The TEKCOPLUS COTK-57 Portable CO2 Meter features a high-precision NDIR sensor with a wide measurement range up to 9999ppm CO2, temperature from 14°F to 140°F, and humidity from 0.1% to 99.9% RH. Equipped with audible and visual alarms, a large backlit LCD display, and powered by 4 AA batteries, it’s designed for real-time indoor air quality monitoring in homes, offices, classrooms, and grow rooms.

## Description

desertcart.com: CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room : Industrial & Scientific

Review: Handy Meter - I have been having what I assume is an exhaust leak in my car. However I have a very sensitive sense of smell and I didn't want to spend a lot of my time and effort fixing what may be a very small problem. Initially I tried a CO meter however the meter itself was defective. On further investigation I determined that a CO meter was not what I needed anyway. Most modern cars do not output very much CO at all. The catalytic converter converts most CO to CO2 or water. Also, trying to detect CO means detecting a few parts per million. That's difficult. With a CO2 meter it's much easier because any decent sized exhaust leak will VERY quickly spike the CO2 levels in the car. Also, the measurements will be in the 1000s of parts per million so the error range of the meter is less important. In short, if you're looking for exhaust leaks in vehicles it will likely be easier with a CO2 meter as car exhaust is chock full of CO2. On to this meter, it works very well. I tested it in a number of situations and it detected the amount of CO2 that i would expect it to. The manual states that it samples the air once a second and as far as i can tell this is accurate. However, it is not meant to precisely measure the CO2 concentration every second. The sensor takes time to accurately reflect the ambient CO2 level. This is easy enough to test by breathing briefly on the sensor which will cause it to easily jump to over 5000ppm but it will take 30 or more seconds to return to normal. In my own car I found that the CO2 level was no different from my friend's car. So whatever I'm smelling on hard acceleration it is very likely not exhaust gases or is such a tiny amount that it's not adding to CO2 levels. That is a helpful thing for me to know. Further, this meter has applications beyond just testing the cabin of a car. It can also be used in buildings to determine if the amount of ventilation is adequate. Also, it can be used in the home to see if CO2 levels are too high (as can occur particularly when cooking or using a fireplace). I was surprised to see that in both my car and my friend's car, with the air on recirculate, we reached over 1500ppm in just a few minutes. It comes in a cute carrying case that looks like a tiny plastic briefcase. I can't imagine I'd ever use it but if you want to look like a real "pro" it can't hurt to have your meter in it's own case.
Review: Good meter, but CO2 measurement takes up to 3 minutes to settle - I bought this CO2 meter to measure both building health and "other things" of current concern in 2020. The meter appears accurate (fresh air gives 425ppm, which is very close to the current global average of 400ppm). Some might find the meter's user interface is a bit annoying, but anyone who's used a digital multimeter will get use to it right away - same idea of modal buttons as most modern digital multimeters. An important gotcha to be aware of is the CO2 measurement appears to take about 3 minutes to settle on a value. For example, stick it under an N95 mask, let it max out at 10,000 ppm, and then put it under a fresh breeze. It'll take a minute or two to settle back to normal fresh air values. This isn't a show stopper, you just need to be aware of it. If you make a change in the environment wait 3 minutes to measure before you make another change or record the measurement. From the behavior I'd guess they have a very long averaging window for CO2. The RH and temperature measurements settle much more quickly - 10 seconds roughly. Not like my 1 second meat thermometer, but certainly good enough for any building sickness application.

## Features

- HIGH PRECISION: The CO2 Detector is euipped with high accurate sensative chip, the accuracy of CO2 level is: 0-2000ppm(-50ppm/+50ppm or -5%/+5% of the reading); 2000-9999ppm(-10%/+10% of the reading); Humidity: 0.1%- 99.9%RH(Accuracy -3%/+3%RH)
- Large Measurement: This CO2 Meter is designed with accurate and large measuring range, CO2: 0~9999ppm; Temperature: 14°F-140°F(-10°C/+60°C); Humidity: 0.1% - 99.9%RH; Dew Point: -20.0°C-59.9°C; Wet Bulb: -5.0°C-59.9°C
- AUDIBLE AND VISUAL ALARMS - The CO2 Detector will alarm when CO2 level exceed your desired threshold, enabling you to take immediate action to improve air quality
- Large LCD SCREEN: CO2 Meter has large LCD display and equipped with backlight function, it can display real-time CO2 level, temperature, and humidity readings at the same time
- WIDE APPLICATION -The CO2 meter provides precise readings of carbon dioxide levels up to 9999ppm, helping you understand the air quality in your surroundings, 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 | B01KTJL6OK |
| Alarm | Audible |
| Best Sellers Rank | #144,658 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #202 in Indoor Air Quality Meters |
| Brand | TEKCOPLUS |
| Color | Yellow |
| Customer Reviews | 4.2 out of 5 stars 212 Reviews |
| Item Height | 22 centimeters |
| Item Weight | 4.64 ounces |
| Manufacturer | Tekcoplus Ltd |
| Model Number | COTK-57 |
| Operating Humidity | 95 percent |
| Power Source | Battery Powered |
| Product Style | Digital CO2 Meter |
| Sensor Type | Non Dispersive Infrared |
| Style | Digital CO2 Meter |
| UPC | 713072686026 713072682325 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 50 Degrees Celsius |

## Product Details

- **Brand:** TEKCOPLUS
- **Style:** Digital CO2 Meter
- **Power Source:** Battery Powered
- **Color:** Yellow
- **Item Weight:** 0.29 Pounds
- **Alarm:** Audible
- **Operating Humidity:** 95 percent
- **Upper Temperature Rating:** 50 Degrees Celsius
- **Sensor Type:** Non Dispersive Infrared
- **Number of Items:** 1

## Images

![CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room - Image 1](https://m.media-amazon.com/images/I/61PUWnWWghL.jpg)
![CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room - Image 2](https://m.media-amazon.com/images/I/61W-+mENukL.jpg)
![CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room - Image 3](https://m.media-amazon.com/images/I/61ug6rENQIL.jpg)
![CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room - Image 4](https://m.media-amazon.com/images/I/71+37k7dHmL.jpg)
![CO2 Meter Portable CO2 Detector Digital CO2 Monitor with Alarm Function Carbon Dioxide Temperature and Humidity Meter, NDIR CO2 Sensor Indoor Air Quality Monitor for Home Office Grow Room - Image 5](https://m.media-amazon.com/images/I/71O7-BeabVL.jpg)

## Questions & Answers

**Q: How often should I calibrate the CO2 monitor?**
A: For best results, calibrate the CO2 monitor every six months or whenever you notice a significant drift in readings.

**Q: Can I use the monitor without the 9V adaptor?**
A: Yes, the monitor can run on the included batteries. The 9V adaptor is optional for continuous power.

**Q: Is the PC connection cable included?**
A: No, the PC connection cable is not included. It can be purchased separately if needed for advanced data analysis.

**Q: How loud is the sound warning alarm?**
A: The sound warning alarm is loud enough to alert you to high CO2 levels but not excessively loud to cause disturbance.

**Q: What is the battery life of the monitor?**
A: The monitor has a battery life of over 24 hours with alkaline batteries, making it suitable for extended use without frequent replacements.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Handy Meter
*by E***S on November 2, 2017*

I have been having what I assume is an exhaust leak in my car. However I have a very sensitive sense of smell and I didn't want to spend a lot of my time and effort fixing what may be a very small problem. Initially I tried a CO meter however the meter itself was defective. On further investigation I determined that a CO meter was not what I needed anyway. Most modern cars do not output very much CO at all. The catalytic converter converts most CO to CO2 or water. Also, trying to detect CO means detecting a few parts per million. That's difficult. With a CO2 meter it's much easier because any decent sized exhaust leak will VERY quickly spike the CO2 levels in the car. Also, the measurements will be in the 1000s of parts per million so the error range of the meter is less important. In short, if you're looking for exhaust leaks in vehicles it will likely be easier with a CO2 meter as car exhaust is chock full of CO2. On to this meter, it works very well. I tested it in a number of situations and it detected the amount of CO2 that i would expect it to. The manual states that it samples the air once a second and as far as i can tell this is accurate. However, it is not meant to precisely measure the CO2 concentration every second. The sensor takes time to accurately reflect the ambient CO2 level. This is easy enough to test by breathing briefly on the sensor which will cause it to easily jump to over 5000ppm but it will take 30 or more seconds to return to normal. In my own car I found that the CO2 level was no different from my friend's car. So whatever I'm smelling on hard acceleration it is very likely not exhaust gases or is such a tiny amount that it's not adding to CO2 levels. That is a helpful thing for me to know. Further, this meter has applications beyond just testing the cabin of a car. It can also be used in buildings to determine if the amount of ventilation is adequate. Also, it can be used in the home to see if CO2 levels are too high (as can occur particularly when cooking or using a fireplace). I was surprised to see that in both my car and my friend's car, with the air on recirculate, we reached over 1500ppm in just a few minutes. It comes in a cute carrying case that looks like a tiny plastic briefcase. I can't imagine I'd ever use it but if you want to look like a real "pro" it can't hurt to have your meter in it's own case.

### ⭐⭐⭐⭐ Good meter, but CO2 measurement takes up to 3 minutes to settle
*by P***O on August 1, 2020*

I bought this CO2 meter to measure both building health and "other things" of current concern in 2020. The meter appears accurate (fresh air gives 425ppm, which is very close to the current global average of 400ppm). Some might find the meter's user interface is a bit annoying, but anyone who's used a digital multimeter will get use to it right away - same idea of modal buttons as most modern digital multimeters. An important gotcha to be aware of is the CO2 measurement appears to take about 3 minutes to settle on a value. For example, stick it under an N95 mask, let it max out at 10,000 ppm, and then put it under a fresh breeze. It'll take a minute or two to settle back to normal fresh air values. This isn't a show stopper, you just need to be aware of it. If you make a change in the environment wait 3 minutes to measure before you make another change or record the measurement. From the behavior I'd guess they have a very long averaging window for CO2. The RH and temperature measurements settle much more quickly - 10 seconds roughly. Not like my 1 second meat thermometer, but certainly good enough for any building sickness application.

### ⭐⭐⭐⭐⭐ So easy to use
*by J***. on January 14, 2025*

Love how this helps us locate co2 leaks.

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-22*