The Trade Inspection Authority has conducted inspections on carbon monoxide sensors due to the dangers posed by carbon monoxide, a silent killer that is odorless and colorless. This gas, also known as CO or CO2, can be hard to detect without a functioning sensor.

Out of the 12 models inspected, 2 were found to have design flaws and deficiencies in labeling, including issues with instructions. Additionally, 3 more models were flagged for lacking proper labeling.