December 9, 2025
NORTHBROOK, Ill. — Dec. 9, 2025 — UL Solutions (NYSE: ULS), a global leader in applied safety science, issued a public notice regarding carbon monoxide detectors (product model HD10) sold by Shenzhen Huidu Technology Co. Ltd., which bear unauthorized UL certification marks and may pose safety risks.
These products have not been evaluated by UL Solutions to the appropriate safety standards, and it is unknown whether they meet any safety requirements. UL Solutions recommends that these products be removed from service and replaced with a properly UL certified carbon monoxide detector.
The affected products bear an unauthorized UL certification mark and the following on the product labels:
- Carbon Monoxide Detector
- Product Model: HD10
- Lithium Battery Capacity: 1000mAh (3.7V)
- Charging Input: DC 5V1A
- Manufacturer: Shenzhen Huidu Technology Co. Ltd.
“The presence of unauthorized UL Marks on these devices is a serious concern,” said Karine Johnfroe, vice president and general manager of the Built Environment group at UL Solutions. “We urge anyone who has purchased these devices to remove them from service immediately and replace them with a properly UL certified carbon monoxide detector.”
Since 1894, UL Solutions has been integral to enabling fire and life safety technology advancements. UL Solutions’ training, advisory, testing, inspection and certification services for fire, smoke and gas detection technologies help manufacturers bring compliant products to the market.
About UL Solutions
A global leader in applied safety science, UL Solutions (NYSE: ULS) transforms safety, security and sustainability challenges into opportunities for customers in more than 110 countries. UL Solutions delivers testing, inspection and certification services, together with software products and advisory offerings, that support our customers’ product innovation and business growth. The UL Mark serves as a recognized symbol of trust in our customers’ products and reflects an unwavering commitment to advancing our safety mission. We help our customers innovate, launch new products and services, navigate global markets and complex supply chains, and grow sustainably and responsibly into the future. Our science is your advantage.
UL Solutions public notice reference number: 24PN-44C
Media contacts:
Tyler Khan
UL Solutions
ULNews@UL.com
T: +1 (847) 664.2139
Steven Brewster
UL Solutions
ULNews@UL.com
T: +1 (847) 664.8425
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