Hembisen KH-158 – Product Liability Lawyer

2026-03-19 – A carbon monoxide detector sold on Amazon failed to alert occupants to dangerous CO levels, leading to hospitalization. The Hembisen KH-158, manufactured by Shenzhen Hengbisheng Electronics Co., Ltd., was reported to the CPSC SaferProducts database as a poisoning hazard due to a warning defect.

Product Details

Brand Name: Hembisen
Manufacturer: Shenzhen Hengbisheng Electronics Co., Ltd. dba HEMBISEN
Model: KH-158
Retailer: www.amazon.com
Incident Report Number: 5928833
Severity Type Name: Hospital Admission
Severity Type ID: 10

Incident Overview

On March 2, 2026, a consumer installed a Hembisen KH-158 carbon monoxide detector in their home according to the manufacturer's instructions. Despite proper placement and normal operation, the device did not activate when carbon monoxide accumulated in the residence. The occupants received no audible or visual warning of the toxic gas, resulting in prolonged exposure.

The failure led to serious health consequences, with one or more occupants requiring hospital admission for carbon monoxide poisoning. The incident report notes that the detector lacks UL certification, raising concerns about its compliance with recognized U.S. safety standards. The reporter retained the product and packaging.

Safety Concerns

Immediate Dangers: Carbon monoxide is a colorless, odorless gas that can cause unconsciousness and death within minutes at high concentrations. Without an alarm, occupants may not realize they are being poisoned until it is too late.

Long-Term Risks: Even non-lethal CO exposure can lead to permanent neurological damage, including memory loss, cognitive impairment, and heart problems. Continued use of a faulty detector creates ongoing risk.

Who Might Be Affected: Everyone in the home is at risk, especially children, the elderly, and those with respiratory or heart conditions, who are more vulnerable to CO poisoning. Pets are also susceptible.

Warning Signs: A properly functioning CO detector should emit a loud alarm when gas levels become dangerous. The absence of such a warning is itself a critical sign of device failure—there may be no other indication until symptoms like headache, dizziness, or nausea appear.

What Our Clients Say

What Consumers Should Do

Stop Using Immediately: Discontinue use of the Hembisen KH-158 carbon monoxide detector and replace it with a certified unit from a reputable brand.
Preserve the Product: Keep the detector, packaging, and any documentation intact. These items may be important evidence for future investigation or legal action.
Document the Incident: Write down the date, time, and details of the exposure, including any symptoms experienced and medical treatment received. Save medical records and receipts.
Seek Medical Attention: If you or anyone in your household experienced symptoms of CO poisoning—headache, dizziness, weakness, nausea, confusion—consult a healthcare provider immediately, even if symptoms have resolved.
Report to the CPSC: File a report at SaferProducts.gov to alert regulators and help prevent future incidents.
Check for Recalls: Visit CPSC.gov to see if the Hembisen KH-158 or similar models have been recalled.

Consumers who suffered injury or property damage from this product may wish to speak with a product liability attorney to understand their legal 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 explore your legal rights. 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.