Hembisen KH-158 – Product Liability Lawyer

2026-03-24 – A carbon monoxide alarm sold on Amazon failed to activate during a gas leak, exposing a family to toxic gas and resulting in hospital admission, according to a report filed with the U.S. Consumer Product Safety Commission (CPSC). The incident involves the Hembisen KH-158 carbon monoxide alarm, manufactured by Shenzhen KanghuaShengshi Industrial Co., LTD., and highlights a poisoning hazard due to an alleged design defect.

Product Details

Brand Name: Hembisen
Manufacturer: Shenzhen KanghuaShengshi Industrial Co.,LTD.
Model: KH-158
Retailer: www.amazon.com
Incident Report Number: 5938674
Severity Type Name: Hospital Admission
Severity Type ID: 10

Incident Overview

On March 5, 2026, a consumer had installed a Hembisen KH-158 carbon monoxide alarm in their home for safety monitoring. The device was placed in the living area and powered on as instructed. Later that day, a gas leak occurred, causing carbon monoxide to accumulate indoors. Despite the presence of the gas, the alarm did not activate or sound any warning.

The failure to alert the occupants meant that family members were exposed to carbon monoxide for an extended period without awareness. They began experiencing symptoms such as dizziness and difficulty breathing. Emergency medical services were contacted, and family members were transported to the hospital for treatment of suspected carbon monoxide poisoning. The consumer reported that the alarm was being used in a normal residential setting and had not provided any audible warning during the incident.

Safety Concerns

Immediate Dangers: Carbon monoxide is an odorless, colorless gas that can cause loss of consciousness and death within minutes at high concentrations. When a detector fails to activate, occupants remain unaware of the danger and continue breathing the toxic gas.

Long-Term Risks: Even non-lethal exposure can lead to lasting neurological damage, including memory loss, cognitive impairment, and heart problems. Repeated or prolonged exposure increases the risk of chronic health issues.

Who Might Be Affected: All occupants of a home are at risk, but children, pregnant women, the elderly, and individuals with respiratory or heart conditions are more vulnerable to carbon monoxide poisoning.

Warning Signs: Symptoms of carbon monoxide exposure include headache, dizziness, weakness, nausea, confusion, and shortness of breath. If multiple family members experience these symptoms simultaneously, it may indicate a carbon monoxide leak, especially if a detector fails to sound.

What Our Clients Say

What Consumers Should Do

Stop Using Immediately: Discontinue use of the Hembisen KH-158 carbon monoxide alarm and remove it from service. Do not rely on it for safety.

Preserve the Product: Keep the alarm in its current condition, along with all packaging and documentation. Do not attempt to repair or modify it, as it may be needed for investigation.

Document the Incident: Take photographs of the product, its installation location, and any visible damage. Save receipts, purchase records, and medical records related to the exposure.

Seek Medical Attention: If you or anyone in your household experienced symptoms of carbon monoxide poisoning, seek medical evaluation immediately, even if symptoms have resolved.

Report to the CPSC: File a report at SaferProducts.gov to alert regulators and help prevent future incidents. Reference Report ID 5938674.

Check for Recalls: Visit CPSC.gov to check whether the Hembisen KH-158 or similar models have been recalled.

Consumers who suffered injury or property damage as a result of this product failure may wish 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. Our attorneys operate on a contingency fee basis, meaning we only get paid if we recover compensation for you. We offer free, no-obligation consultations to discuss your case and answer your questions. 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.