When buying an alarm, you must be familiar with these two certification marks!
Includes a guide on how to check the official website – learn how to spot fakes in just 3 minutes
1. Let me start by asking you a question
When you buy smoke alarms, carbon monoxide detectors and the like, have you ever stopped to think whether they are actually safe?
Many people focus solely on price, appearance and reviews when buying alarms, yet overlook the most crucial point:
Has the product undergone safety certification?
The ETL and UL certifications we’re discussing today are the two most important electrical safety certifications in the North American market, and they serve as key indicators for determining whether an alarm is reliable.
2. What are ETL and UL respectively?
UL (Underwriters Laboratories)
Founded in 1894, with a history spanning over 130 years, UL is one of the most widely recognised safety certification bodies in North America and indeed worldwide.
UL certification covers almost all product categories, including electrical appliances, electronics, lighting and industrial equipment; you will often see the circular UL mark on the nameplates of many household appliances.
ETL (Electrical Testing Laboratories)
Operated by the Intertek Group, it is also an officially recognised NRTL (Nationally Recognised Testing Laboratory) in North America.
ETL certification holds exactly the same legal standing as UL certification and is equally accepted by major North American retailers, insurance companies and building codes.
ETL vs UL: which is better? — There is no clear winner! Both are recognised by the US OSHA, and which one is used depends on the manufacturer. For consumers, seeing either mark is a sign that the product meets the required standards.
3. Why do you need to check for yourself? Isn’t it enough just to look at the mark?
This is a question many consumers haven’t considered.
In fact, there are a great many products on the market bearing ETL or UL marks that have never actually been certified. Marks can be counterfeited, but databases cannot be falsified.
Therefore, the safest approach is to take the product’s brand name or model number and verify it against the official database.
4. Step-by-Step Guide to Checking Certifications – Tutorial
Method 1: Checking UL Certification → UL Product iQ
1. Open your browser and go to: https://iq.ul.com
2. Enter the product brand name or UL file number in the search box
3. Click ‘Search’ and locate the relevant product in the results list
4. Check the certification status:
• Active = Certification valid ✅
• Cancelled or Withdrawn = Expired ❌
The UL file number is usually printed on the nameplate on the bottom of the product or in the instruction manual, in a format such as ‘File No. E123456’. This is the most accurate way to search for it!
Method 2: Check ETL certification → Intertek certification search
5. Go to: https://www.intertek.com/marks/etl/verify/
6. Enter the brand name, model number or certificate number
7. Check that the model number in the search results matches the product you have
8. Check whether the certification category covers the intended use of the product (e.g. Listed or Recognised)
5. Quick Comparison: ETL vs UL at a Glance
6. Shopping Tips
• When purchasing smoke alarms, prioritise products with ETL or UL certification.
• Once you have purchased a product, make a habit of checking the official website; it only takes 10 seconds.
• If you cannot find the relevant certification records, we recommend exercising caution and contacting the seller or the platform to verify the product’s authenticity.
• Please note: Extremely low-priced smoke alarms from unknown manufacturers are often the most problematic.
7. Conclusion
ETL and UL certifications are not some mysterious concept, but tangible safety endorsements that can be checked and verified.
Next time you’re buying an electrical appliance, take 30 seconds to check:
• UL certification → iq.ul.com
• ETL certification → intertek.com/marks/etl/verify/
We hope this article helps you shop with confidence and use your appliances with peace of mind. If you found this useful, please share it with your friends!