---
product_id: 599547683
title: "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: "€ 90.42"
currency: EUR
in_stock: true
reviews_count: 13
category: "Toptes"
url: https://www.desertcart.hr/products/599547683-ct-300-portable-carbon-monoxide-detector-co-detector-with-audible
store_origin: HR
region: Croatia
---

# 0-5000 ppm ultra-sensitive range Dual audible & visual alarms 40-hour battery life with 3 AAA included 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:** € 90.42
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay Ahead of Danger with Instant CO Alerts!

## Quick Answers

- **What is this?** 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?** € 90.42 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/599547683-ct-300-portable-carbon-monoxide-detector-co-detector-with-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 guarantee you never miss a critical CO spike, whether at home, in your car, or on the trail.
- • **Ready Out-of-the-Box:** Includes 3 AAA alkaline batteries and user manual—no extra purchases needed to start safeguarding your space immediately.
- • **Portable & Durable Design:** Compact, anti-slip ABS/PC casing with included protective case makes it your go-anywhere safety companion for camping, travel, or daily use.
- • **Swift & Precise CO Detection:** Electrochemical sensor delivers rapid, accurate readings from 0 to 5000 ppm, ensuring early warnings before danger strikes.
- • **User-Friendly & Energy Efficient:** Backlit LCD for easy reading in any light, auto shut-off to save power, plus low battery alerts keep you reliably protected without hassle.

## Overview

The TopTes CT-300 is a portable carbon monoxide detector featuring an advanced electrochemical sensor that measures CO levels from 0 to 5000 ppm. It combines audible and visual alarms with a backlit LCD screen for clear, immediate alerts. Designed for versatile use in homes, vehicles, and outdoor settings, it includes 3 AAA batteries for up to 40 hours of operation and a durable, anti-slip casing. This device empowers professionals and adventurers alike to detect CO hazards swiftly, ensuring peace of mind wherever life takes you.

## Description

Product description How do I use the device correctly for carbon monoxide detection? 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. How do I use the device correctly for carbon monoxide detection? 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. Why do I smell a carbon monoxide leak, but the CT-300 doesn’t detect anything? 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. Why do I smell a carbon monoxide leak, but the CT-300 doesn’t detect anything? 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. Why can't carbon monoxide be detected in a closed room? 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). Why can't carbon monoxide be detected in a closed room? 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). Why can't carbon monoxide be detected even when there is a combustion source present? 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. Why can't carbon monoxide be detected even when there is a combustion source present? 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.

Review: Potentially Life-Saving — Caught a Dangerous Issue We Wouldn’t Have Noticed - I picked up the TopTes CT-300 Portable Carbon Monoxide Detector as a simple safety tool, and it turned out to be one of the most important purchases I’ve made. This unit alerted us to a serious issue with our apartment’s gas heater, it wasn’t igniting properly and was releasing gas into the space. Without this detector, we likely wouldn’t have noticed anything was wrong until it became a real emergency. What really stands out is how responsive and accurate it feels. It provides real-time readings with clear numerical values, so you’re not just relying on a basic alarm, you can actually see changes in air quality as they happen. In our case, the readings made it obvious something was off almost immediately. The alarm system is very effective. It’s both audible and visual, the alarm is loud enough to get your attention, and the screen changes color as levels rise, so you can quickly gauge how serious the situation is. The display is backlit and easy to read at a glance, even in lower light. Functionality is straightforward and practical. It powers on quickly, starts measuring right away, and is portable enough to move from room to room or even use in a car or while traveling. It works well as a supplemental safety device or for spot-checking specific areas. Battery life has been solid for a portable unit, and it runs on standard AAA batteries, which are easy to replace. There’s also a low battery indicator so you’re not caught off guard. Overall, this isn’t just a gadget, it’s a genuinely useful safety device. In our case, it very likely prevented a dangerous situation from getting worse. Highly recommended for anyone with gas appliances or heaters. It’s a small investment that can make a critical difference.
Review: Excellent for maintenance and cofined space work. - Excellent device. Very useful for maintenance techs and anyone working in confined spaces where carbon monoxide can be a concern. Accurate readings with clear audible and visual alarms. Compact, easy to carry, and simple to use. Also, a great safety tool for RV or camper owners who have a gas cooktop inside. Highly recommended.

## 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 |
| Best Sellers Rank | #13,484 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #22 in Carbon Monoxide Detectors |
| Brand | TOPTES |
| Built-In Media | 1x CT-300 Carbon Monoxide Detector, 1x Protective Case, 1x User Manual, 3x AAA Batteries |
| Color | Orange |
| Customer Reviews | 4.4 out of 5 stars 1,086 Reviews |
| Item Weight | 0.3 Kilograms |
| Manufacturer | TOPTES |
| Mfr Part Number | CT-300 |
| Model Number | CT-300 |
| Number of Items | 1 |
| Operating Humidity | 90 percent |
| Power Source | Battery Powered |
| Product Style | CT-300 CO detector |
| Sensor Type | Electrochemical |
| Style | CT-300 CO detector |
| Unit Count | 1.0 Count |

## Product Details

- **Alarm:** Audible, Visual
- **Brand:** TOPTES
- **Color:** Orange
- **Item Weight:** 0.3 Kilograms
- **Number of Items:** 1
- **Operating Humidity:** 90 percent
- **Power Source:** Battery Powered
- **Sensor Type:** Electrochemical
- **Style:** CT-300 CO detector
- **Unit Count:** 1.0 Count

## Images

![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)
![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)
![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)
![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)
![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

### ⭐⭐⭐⭐⭐ Potentially Life-Saving — Caught a Dangerous Issue We Wouldn’t Have Noticed
*by C***D on March 18, 2026*

I picked up the TopTes CT-300 Portable Carbon Monoxide Detector as a simple safety tool, and it turned out to be one of the most important purchases I’ve made. This unit alerted us to a serious issue with our apartment’s gas heater, it wasn’t igniting properly and was releasing gas into the space. Without this detector, we likely wouldn’t have noticed anything was wrong until it became a real emergency. What really stands out is how responsive and accurate it feels. It provides real-time readings with clear numerical values, so you’re not just relying on a basic alarm, you can actually see changes in air quality as they happen. In our case, the readings made it obvious something was off almost immediately. The alarm system is very effective. It’s both audible and visual, the alarm is loud enough to get your attention, and the screen changes color as levels rise, so you can quickly gauge how serious the situation is. The display is backlit and easy to read at a glance, even in lower light. Functionality is straightforward and practical. It powers on quickly, starts measuring right away, and is portable enough to move from room to room or even use in a car or while traveling. It works well as a supplemental safety device or for spot-checking specific areas. Battery life has been solid for a portable unit, and it runs on standard AAA batteries, which are easy to replace. There’s also a low battery indicator so you’re not caught off guard. Overall, this isn’t just a gadget, it’s a genuinely useful safety device. In our case, it very likely prevented a dangerous situation from getting worse. Highly recommended for anyone with gas appliances or heaters. It’s a small investment that can make a critical difference.

### ⭐⭐⭐⭐⭐ Excellent for maintenance and cofined space work.
*by A***L on April 26, 2026*

Excellent device. Very useful for maintenance techs and anyone working in confined spaces where carbon monoxide can be a concern. Accurate readings with clear audible and visual alarms. Compact, easy to carry, and simple to use. Also, a great safety tool for RV or camper owners who have a gas cooktop inside. Highly recommended.

### ⭐⭐⭐⭐⭐ Nice product for the price
*by J***D on March 6, 2026*

Give it five stars because when it worked it worked great! It was accurate, battery lasted a long time, co detection was good but it unfortunately failed on me.

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-16*