---
product_id: 599547683
title: "TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange"
brand: "toptes"
price: "₩134715"
currency: KRW
in_stock: true
reviews_count: 13
category: "Toptes"
url: https://www.desertcart.kr/products/599547683-toptes-ct-300-portable-carbon-monoxide-detector-co-detector-audible
store_origin: KR
region: South Korea
---

# 0-5000 ppm ultra-sensitive range Dual audible & visual alarms 40-hour battery life with 3 AAA included TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange

**Brand:** toptes
**Price:** ₩134715
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay Ahead of Invisible Dangers—Detect CO Before It Detects You!

## Quick Answers

- **What is this?** TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange by toptes
- **How much does it cost?** ₩134715 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/599547683-toptes-ct-300-portable-carbon-monoxide-detector-co-detector-audible)

## Best For

- toptes enthusiasts

## Why This Product

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

## Key Features

- • **Dual Alarm System:** Visual color-changing screen plus loud audible alerts ensure you never miss a dangerous CO spike.
- • **Backlit LCD Screen:** Clear, easy-to-read display even in dim or nighttime environments—because safety never sleeps.
- • **Portable & Durable Design:** Compact, anti-slip ABS/PC casing fits perfectly in your hand or travel bag—ready for home, car, or camping.
- • **Swift & Precise CO Detection:** Electrochemical sensor delivers rapid, accurate readings from 0 to 5000 ppm—early warnings that save lives.
- • **User-Friendly Power Management:** Includes 3 AAA batteries with low-power indicator and auto shut-off to maximize battery life and reliability.

## Overview

The TopTes CT-300 is a compact, portable carbon monoxide detector featuring an advanced electrochemical sensor with a detection range of 0-5000 ppm. It combines audible and visual alarms for immediate alerts, a backlit LCD for easy reading in any light, and a durable, anti-slip design powered by 3 included AAA batteries offering up to 40 hours of continuous use. Ideal for home, car, camping, and travel, it empowers proactive safety with fast, reliable CO detection wherever you go.

## Description

TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange - desertcart.com

Review: Does a great job - I purchased this as a method to pinpoint CO leaks as needed in an RV. The unit works well and I have tested it in an environment with CO and it worked perfectly. Once exposed to CO it takes a few seconds to register. I specifically wanted something with standard batteries because my luck is when I need it rechargeable batteries are dead. This way I can quickly replace them. I read other reviews saying that it didn’t detect CO2 which it isn’t supposed to it detects CO (carbon monoxide) and it performs well. The unit is easily stored and portable. For the price point it is a great value.
Review: Reliable, quick readings, very sensitive. - This handheld carbon monoxide detector is a must have if you have any type of gas in your home! I recently renovated my kitchen and switched the oven from electric to propane. While using the oven for the very first time the flame in the oven just didn’t look right to me. I took out the CO detector and confirmed that there were dangerous levels of CO emanating from the oven. Turns out the plumber who installed the oven never converted it from natural gas to propane. This handheld is easy to use, turns on fast and it’s quickly ready to test your appliances.

## Features

- Carbon Monoxide Detector: TopTes CT-300 is an ideal portable CO tester to help you detect CO gas concentrations timely and accurately, reducing the risk of CO poisoning and protecting your life. It is a must-have tool for homeowners, drivers, campers, DIY-ers, tourists, etc
- Swift & Precise Measurement: The CT-300, with an advanced electrochemical sensor head, swiftly detects CO levels from 0-5000 ppm. Its sensitivity ensures early warnings, allowing timely actions to prevent health risks. Accurate readings empower quick decisions, promoting safety and well-being. Versatile and portable, it guards against CO in various settings, ensuring peace of mind
- Visual & Audible Alarm: The travel CO detector uses both visual and audible alarms. When the concentration of CO reaches the alarm threshold, the screen changes color and emits an urgent alarm sound to alert you of the presence of CO gas in your surroundings, allowing you to promptly detect the danger, protect yourself
- User-Friendly Functions: With high-quality ABS and PC material and anti-slip edge texture, CT-300 is durable and portable; It can be used for 40 hours with new batteries; Low-power indicator will remind you of time to change batteries; It will automatically switch off when not in operation or when no gas is detected within 10 minutes to save power (can be canceled); Backlit screen for easy viewing, adaptable to dim environments
- Correct detection method: You can detect whether the CT-300 is working properly by detecting smoke from cigarettes, or burning organic matter (paper, etc.) in a sealed container. You will receive CT-300 Carbon Monoxide Detector, Protective Case, AAA Batteries, User Manual

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CL9MV4MG |
| Alarm | Audible, Visual |
| Batteries | 3 AAA batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #10,030 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #45 in Carbon Monoxide Detectors |
| Brand | TOPTES |
| Color | Orange |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,047) |
| Date First Available | October 17, 2023 |
| Included Components | 1x CT-300 Carbon Monoxide Detector, 1x Protective Case, 1x User Manual, 3x AAA Batteries |
| Item Weight | 10.6 ounces |
| Item model number | CT-300 |
| Manufacturer | TOPTES |
| Number of Items | 1 |
| Operating Humidity | 90 percent |
| Part Number | CT-300 |
| Power Source | Battery Powered |
| Product Dimensions | 2.64 x 1.38 x 6.3 inches |
| Sensor Type | Electrochemical |
| Style | CT-300 CO detector |

## Product Details

- **Alarm:** Audible, Visual
- **Brand:** TOPTES
- **Color:** Orange
- **Item Weight:** 0.3 Kilograms
- **Manufacturer:** TOPTES
- **Number of Items:** 1
- **Operating Humidity:** 90 percent
- **Power Source:** Battery Powered
- **Sensor Type:** Electrochemical
- **Style:** CT-300 CO detector

## Images

![TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange - Image 1](https://m.media-amazon.com/images/I/7139F43kLCL.jpg)
![TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange - Image 2](https://m.media-amazon.com/images/I/71fMzKQcNXL.jpg)
![TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange - Image 3](https://m.media-amazon.com/images/I/71Wa2kXBX9L.jpg)
![TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange - Image 4](https://m.media-amazon.com/images/I/71lAH6c+lbL.jpg)
![TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange - Image 5](https://m.media-amazon.com/images/I/71io7RL-M1L.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: How do I use the device correctly for carbon monoxide detection?**
A: Step1: Turn on the CT-300 in a fresh air environment (e.g., a well-ventilated outdoor space) and wait for it to warm up. Step2: Approach the CO source for detection. Detecting from a distance may cause CO to disperse, leading to unstable readings.

**Q: Why do I smell a carbon monoxide leak, but the CT-300 doesn’t detect anything?**
A: The smell you notice is unlikely to originate from carbon monoxide (CO), as CO is colorless and odorless. The odor may be caused by another gas, such as a combustible gas. We recommend using a combustible gas detector to identify the source.

**Q: Why can't carbon monoxide be detected in a closed room?**
A: When there is no significant source of combustion indoors, even in a closed room, carbon monoxide will not be generated. The gases exhaled by humans contain carbon dioxide (CO2), which is a different gas from carbon monoxide (CO).

**Q: Why can't carbon monoxide be detected even when there is a combustion source present?**
A: Not all combustion produces CO gas, only incomplete combustion does, which is characterized by a red/yellow flame in most cases. Also, ensure proximity during measurement to prevent gas dispersion, which may lead to undetectable concentrations.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Does a great job
*by M***. on February 21, 2026*

I purchased this as a method to pinpoint CO leaks as needed in an RV. The unit works well and I have tested it in an environment with CO and it worked perfectly. Once exposed to CO it takes a few seconds to register. I specifically wanted something with standard batteries because my luck is when I need it rechargeable batteries are dead. This way I can quickly replace them. I read other reviews saying that it didn’t detect CO2 which it isn’t supposed to it detects CO (carbon monoxide) and it performs well. The unit is easily stored and portable. For the price point it is a great value.

### ⭐⭐⭐⭐⭐ Reliable, quick readings, very sensitive.
*by N***Y on May 26, 2025*

This handheld carbon monoxide detector is a must have if you have any type of gas in your home! I recently renovated my kitchen and switched the oven from electric to propane. While using the oven for the very first time the flame in the oven just didn’t look right to me. I took out the CO detector and confirmed that there were dangerous levels of CO emanating from the oven. Turns out the plumber who installed the oven never converted it from natural gas to propane. This handheld is easy to use, turns on fast and it’s quickly ready to test your appliances.

### ⭐⭐⭐⭐⭐ Carbon Monoxide tester does work
*by R***K on February 5, 2026*

I used this to determine that my oil burning furnace had no carbon monoxide exhaust leaks in the house. To verify that it was indeed working I turned it on and walked to my running car and as I approached the car the tester alarm went off and continued to increase as I got to the back of the car. It seems to only test CO and levels of CO. I was able to Check the entire house fully.

## Frequently Bought Together

- TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange
- PT520A Natural Gas Detector, Gas Leak Detector with 17-Inch Gooseneck, Locating The Source Like Propane, Methane, and Butane for Home and RV (Includes Battery x3) - Orange
- TopTes PT199 Natural Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Sources Like Methane, Propane for Home(Includes Battery x2)-Orange

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-27*