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  • Public Notice

UL Solutions Warns of Unauthorized UL Marks on Carbon Monoxide Alarms

The following is a notification (24PN-25) from UL Solutions that the carbon monoxide alarms identified here bear unauthorized UL Marks.

CO Alarm.

April 15, 2025

NORTHBROOK, Ill. — April 15, 2025 — The following is a notification from UL Solutions that the carbon monoxide alarms identified here bear unauthorized UL Marks. The carbon monoxide alarms have not been evaluated by UL Solutions to the appropriate safety standards, and it is unknown if the product complies with any safety requirements. UL Solutions recommends that these products be removed from service.

Name of Product: Kalrin Carbon Monoxide Alarm Model C11-L

Remedy: UL Solutions recommends that this product be removed from service and be replaced by a UL Certified carbon monoxide alarm.

Identification on the Product: The carbon monoxide alarm bears an unauthorized UL Mark and the following:

Kalrin CARBON MONOXIDE ALARM (TYPE B) C11-L

UL Mark.

support@kalrin.com / www.kalrin.com

Location: The products were sold on Walmart.com and may have been sold through other e-commerce retailers.

Carbon Monoxide Testing and Certification: UL Solutions tests and certifies carbon monoxide detectors to safety standards. A UL-certified detector will bear the UL Mark, indicating that it has met specific quality and safety standards and is capable of accurately detecting carbon monoxide gas. The UL Mark, displayed on carbon monoxide detectors, is a globally recognized symbol of safety and performance.

About UL Solutions

A global leader in applied safety science, UL Solutions 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.

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

Photos:

CO Alarm.

CO Alarm.

CO Alarm.