Hembisen carbon monoxide alarms
4 reports to CPSC, the latest made Mar 8, 2026. A report isn’t a recall.
Watch and the shortlist are kept with a free account, on every device. Your watch list. CPSC’s own search is on saferproducts.gov.
At a glance
From SaferProducts.gov, released Oct 25, 2026.
- 4reports to CPSC
- Mar 8, 2026the latest report was made
- Feb 27, 2026the earliest
- 0with the company’s comments
- Brand
- Hembisen
- Makers
- Shenzhen Hengbisheng Electronics Co., Ltd. dba HEMBISEN and Shenzhen KanghuaShengshi Industrial Co.,LTD.Makers, importers or sellers, as the reports name them
- Product
- Carbon monoxide alarmsCPSC’s product type: Carbon Monoxide Detectors (code 712), in Home Maintenance and Structures: Home Security
By month
The numbers, as a table
| Month | Reports |
|---|---|
| March 2026 | 3 |
| February 2026 | 1 |
How badly anyone was hurt
- Hospital admission 4 CPSC: Injury, Hospital Admission
As each report says it, in short words; CPSC’s own words are under each.
The reports, as CPSC published them
Reports people made to the U.S. Consumer Product Safety Commission. CPSC publishes each one after sending it to the company named, and doesn’t guarantee they’re accurate. A report isn’t a recall.
Each report is the words of the person who made it, as CPSC published them. The company’s comments, where CPSC published any, are set apart as the company’s own.
CPSC, SaferProducts.gov public database export. Released Oct 25, 2026. Updated daily.
-
Hospital admission Made Mar 8, 2026, sent to the company Mar 10, 2026, published by CPSC Mar 24, 2026
The product, in the report: The product is a residential carbon monoxide alarm purchased online from Amazon. The device is a small electronic safety detector designed to monitor carbon monoxide levels in the home and sound an audible alarm when dangerous levels are detected. The unit is a compact rectangular device with a white plastic housing and a front display panel. It is designed to be installed indoors in residential spaces such as bedrooms, hallways, or living areas to monitor air quality and provide warning of carbon monoxide exposure. The product appears to be a plug-in or battery-powered carbon monoxide detector intended for continuous safety monitoring. It was installed inside the home according to its intended purpose to detect carbon monoxide gas and alert occupants with an audible alarm if dangerous levels were present. The product was purchased through the Amazon marketplace and was advertised as a carbon monoxide alarm for home safety.
A carbon monoxide alarm purchased from Amazon was installed and used in our home for safety monitoring. The product was intended to detect dangerous levels of carbon monoxide and sound an alarm to warn occupants.
On the day of the incident, there was a gas leak in the home that caused carbon monoxide to accumulate indoors. The alarm was installed and powered on as instructed and was located in the living area of the house. However, the device did not activate or sound any warning during the incident.
Because the alarm failed to alert us, the occupants of the home were exposed to carbon monoxide for an extended period of time without warning. Family members began experiencing symptoms consistent with carbon monoxide exposure, including dizziness and difficulty breathing. Emergency medical services were contacted and family members were transported to the hospital for treatment related to suspected carbon monoxide poisoning.
The product being used was a carbon monoxide alarm intended for residential safety monitoring. It was being used in a normal residential setting as a safety detector. At the time of the incident, the device did not provide any audible warning despite the presence of carbon monoxide in the home.
The failure of the alarm to activate created a serious safety risk and may have contributed to the injuries that occurred.
- Model
- KH-158
- UPC
- Not available
- Serial number
- Not Available
- Bought from
- www.amazon.com
- Bought
- Feb 7, 2026, about then
- Where
- TYNGSBORO, Massachusetts: Home/
Apartment/ Condominium - Who was involved
- Age 60, Male
- The reporter’s relation to them
- My Parent
- As this report names them
- Brand Hembisen, made or sold by Shenzhen KanghuaShengshi Industrial Co.,LTD.
- How badly, in CPSC’s words
- Injury, Hospital Admission
-
Hospital admission Made Mar 4, 2026, sent to the company Mar 5, 2026, published by CPSC Mar 19, 2026
The product, in the report: The product is a carbon monoxide alarm purchased from Amazon (ASIN: B0DBVYCVK7). It is designed to detect carbon monoxide gas and provide an audible warning when dangerous levels are present. The device is a battery-powered carbon monoxide detector intended for residential use. It is a small, wall-mounted safety device typically installed in homes, apartments, or other indoor living spaces. The product is white in color and includes a digital display. It is marketed as a home safety alarm for carbon monoxide detection. The packaging does not appear to include UL certification markings or manufacturer contact information.
A serious safety incident occurred involving this carbon monoxide alarm. The product did not activate or sound an alarm during a carbon monoxide leak in the home. As a result, a child was exposed to carbon monoxide and suffered injuries.
The product being used was a carbon monoxide alarm purchased from Amazon. It was installed and being used as a home safety device, intended to detect carbon monoxide and alert occupants in case of dangerous gas levels.
The alarm failed to function properly during an actual carbon monoxide exposure incident. Despite the presence of carbon monoxide, the device did not trigger any warning. This failure may have contributed to the injury.
The injured person was a minor who was present in the home when the exposure occurred. Medical attention was required due to symptoms caused by carbon monoxide exposure.
Additionally, the product packaging did not include UL certification markings or manufacturer contact information, raising concerns about compliance and safety standards.
- Model
- KH-158
- UPC
- Not available
- Serial number
- Not Available
- Bought from
- www.amazon.com
- Bought
- Sep 30, 2025, about then
- Where
- Greenville, North Carolina: Home/
Apartment/ Condominium - Who was involved
- Age 14, Female
- The reporter’s relation to them
- My Child
- As this report names them
- Brand Hembisen, made or sold by Shenzhen Hengbisheng Electronics Co., Ltd. dba HEMBISEN
- How badly, in CPSC’s words
- Injury, Hospital Admission
-
Hospital admission Made Mar 3, 2026, sent to the company Mar 5, 2026, published by CPSC Mar 19, 2026
The product, in the report: The product is a Hembisen Combination Natural Gas and Carbon Monoxide Detector, sold under ASIN B0DBVYCVK7 on Amazon.com. It is a plug-in 4-in-1 alarm device designed for home safety, intended to detect carbon monoxide and combustible (natural) gas, and also display temperature (F) and humidity levels in real time. The unit has a digital display and emits an audible alarm when dangerous gas concentrations are detected. It is black in color, portable, and powered by plugging into an AC110-220V outlet. The model number is KH-158. It is marketed for use in residences, apartments, RVs, offices and similar indoor environments. Product name: Hembisen Combination Natural Gas and Carbon Monoxide Detector ASIN: B0DBVYCVK7 Model: KH-158 Type: 4-in-1 plug-in gas and carbon monoxide alarm with digital display Features: Carbon monoxide detection, combustible gas detection, temperature (F) display, humidity display, audible alarm Power source: Plug-in AC110-220V Color: Black Intended use: Home, apartment, RV, office, hotel safety device Purpose: Monitor carbon monoxide and explosive gas levels and alert occupants Sensor types: Catalytic and electrochemical (as described) Weight: Approximately 1.6 ounces
The product is a carbon monoxide detector installed in a residential environment. After proper installation and normal use, the device failed to detect the presence of carbon monoxide and did not provide any warning or alarm. As a result, occupants were exposed to carbon monoxide without notification, leading to serious health consequences and hospitalization due to carbon monoxide poisoning.
Additionally, the product does not appear to have UL certification and may not meet recognized U.S. safety standards for carbon monoxide detectors. This raises significant safety concerns regarding its compliance and reliability.
- Model
- KH-158
- UPC
- Not available
- Serial number
- Not Available
- Bought from
- www.amazon.com
- Bought
- Feb 20, 2026, about then
- Where
- Worthington, Ohio: Home/
Apartment/ Condominium - Who was involved
- Unknown
- The reporter’s relation to them
- Unspecified
- As this report names them
- Brand Hembisen, made or sold by Shenzhen Hengbisheng Electronics Co., Ltd. dba HEMBISEN
- How badly, in CPSC’s words
- Injury, Hospital Admission
-
Hospital admission Made Feb 27, 2026, sent to the company Mar 3, 2026, published by CPSC Mar 17, 2026
The product, in the report: Product Description: The product is a plug-in Combination Natural Gas and Carbon Monoxide Detector sold on Amazon (ASIN: B0DBVYCVK7). It is a household gas safety alarm device designed to detect natural gas leaks and carbon monoxide levels. The device is rectangular in shape, white in color, and plugs directly into a standard wall outlet. It has a digital LED display on the front panel that shows gas concentration levels and alarm status. The unit includes an audible alarm speaker and indicator lights. It is intended for indoor residential use in homes, apartments, and similar living spaces.
Dear CPSC Compliance Officer,
I am writing to report a serious safety concern regarding a consumer product that fails to detect carbon monoxide (CO), a potentially deadly gas. I believe this product presents a significant safety risk to consumers.
Product Details:
Product Name: Combination Natural-Gas and Carbon-Monoxide-Detector Plug-in, 4 Sensors with Carbon Monoxide Alarm,F & Humidity,Explosive Gas Detector Alarm for Home,RV,Apartment
ASIN: B0DBVYCVK7
Seller: [REDACTED]. (sold via Amazon.com)
URL: https://www.amazon.com/dp/B0DBVYCVK7
Manufacturer (from product listing): Shenzhen Kanghua Shengshi Industrial Co., LTD
Incident Description: On February 25, 2026, my family members were rushed to the emergency room due to acute Carbon Monoxide poisoning. Despite the presence of this CO detector in our home, the device failed to sound any alarm or show any elevated readings while CO levels had reached life-threatening concentrations.
It is clear that this device is not a functional safety tool but a deceptive and dangerous product that provides a false sense of security.
Request for Action: This product is currently being sold to thousands of American consumers who rely on it to protect their lives. A CO detector that cannot detect CO is a “substantial product hazard” under Section 15 of the Consumer Product Safety Act.
I urgently request that the CPSC:
Immediately investigate this specific product and its manufacturer/supplier.
Test the effectiveness of this model to prevent further injuries or potential fatalities.
Initiate a formal recall to remove this hazardous item from the U.S. market and Amazons platform.
I have attached picture for your review. I am fully prepared to cooperate with your investigation and can provide the defective unit for testing if required.
I look forward to your prompt response regarding this life-and-death matter.
Sincerely, [REDACTED]
- Model
- KH-158
- UPC
- Not available
- Serial number
- Not Available
- Bought from
- www.amazon.com
- Bought
- Feb 10, 2026, about then
- Where
- Manchester, New Hampshire: Home/
Apartment/ Condominium - Who was involved
- Age 15, Female
- The reporter’s relation to them
- My Child
- As this report names them
- Brand Hembisen, made or sold by Shenzhen Hengbisheng Electronics Co., Ltd. dba HEMBISEN
- How badly, in CPSC’s words
- Injury, Hospital Admission
CPSC’s disclaimer
Disclaimer: CPSC does not guarantee the accuracy, completeness, or adequacy of the contents of the Publicly Available Consumer Product Safety Information Database on SaferProducts.gov, particularly with respect to information submitted by people outside of CPSC.
Word for word, from the disclaimer in CPSC’s export.
Sources
Sources
-
U.S. Consumer Product Safety Commission, SaferProducts.gov public database export.
Released Oct 25, 2026 and checked Oct 25, 2026. Updated daily. Public domain (U.S. Government work). CPSC asks to be credited, and that no endorsement be implied.
Reports of harm are from the U.S. Consumer Product Safety Commission (CPSC), on SaferProducts.gov. CPSC does not endorse Hearth Record.