Hembisen KH-158 – Product Liability Lawyer

2026-03-19 – A carbon monoxide alarm sold on Amazon failed to activate during a real leak, leading to a child's hospitalization, according to a report filed with the U.S. Consumer Product Safety Commission's SaferProducts.gov database. The incident involves the Hembisen KH-158, manufactured by Shenzhen Hengbisheng Electronics Co., Ltd., and is classified as a carbon monoxide poisoning hazard with a warning defect.

Product Details

Brand Name: HEMBISEN
Manufacturer: Shenzhen Hengbisheng Electronics Co., Ltd.
Model: KH-158
Retailer: www.amazon.com
Incident Report Number: 5928846
Severity Type Name: Hospital Admission
Severity Type ID: 10

Incident Overview

On February 28, 2026, a consumer's household experienced a carbon monoxide leak while a Hembisen KH-158 alarm was installed and in use. The device was intended to detect dangerous gas levels and alert occupants, but it failed to sound any alarm during the event. As a result, a child present in the home was exposed to carbon monoxide and suffered injuries requiring hospital admission.

According to the incident report filed with the CPSC (Report ID 5928846), the alarm did not activate despite the presence of carbon monoxide. The consumer reported that the product packaging lacked UL certification markings and manufacturer contact information, raising compliance concerns. The alarm was purchased from Amazon and used as a home safety device. The failure of the warning system may have contributed to the severity of the exposure.

Safety Concerns

Immediate Dangers: Carbon monoxide is a colorless, odorless gas that can cause rapid incapacitation and death. When a detector fails to alarm, occupants remain unaware of rising CO levels, leading to symptoms such as headache, dizziness, confusion, and loss of consciousness within minutes.

Long-Term Risks: Even non-fatal CO exposure can result in permanent neurological damage, including cognitive deficits, memory loss, and motor function impairment. Children are particularly vulnerable due to their higher metabolic rates and developing nervous systems.

Who Might Be Affected: Anyone in the home is at risk, but children, the elderly, pregnant women, and individuals with respiratory or heart conditions face greater harm from CO poisoning. The incident report specifically involved a child.

Warning Signs: A properly functioning CO alarm should sound before dangerous levels accumulate. The absence of an alarm in this case meant no warning was provided. Consumers should be aware that a CO alarm that fails to respond to actual gas may also lack visual indicators or fail self-test modes.

What Our Clients Say

What Consumers Should Do

Stop Using Immediately: If you own a Hembisen KH-158 alarm, stop relying on it for protection. Replace it with a certified unit that bears a recognized safety mark such as UL.

Preserve the Product: Keep the alarm and its packaging in their current condition. Do not modify or discard them, as they may be critical evidence in any future investigation or legal action.

Document the Incident: Take photographs of the product, packaging, and any missing certification marks. Write down the date of purchase and any details about the incident.

Seek Medical Attention: If anyone in your household experienced symptoms of CO poisoning—such as headache, nausea, or confusion—seek immediate medical evaluation, even if symptoms have resolved.

Report to the CPSC: File a report at SaferProducts.gov to alert regulators and help prevent future injuries. Reference incident report 5928846.

Check for Recalls: Visit CPSC.gov to search for recalls on this or similar carbon monoxide alarms.

Consumers who have suffered injury or property damage due to a defective carbon monoxide alarm may want to speak with a product liability attorney about their options.

Manufacturer's Response

The manufacturer's official response to this specific incident report is not publicly available at the time of this writing.

Legal Help Available

H Law Group is a California product liability law firm representing individuals injured by defective products. We handle cases on a contingency fee basis, meaning you pay nothing unless we recover compensation for you. Our team offers free consultations to discuss your situation and legal options. If you or a loved one was injured by Hembisen KH-158 or a similar product, contact H Law Group at (888) 499-4948 for a free, no-obligation consultation.