UL Listing

UL is a third-party certification company that conducts testing and sets the industry standard for safety for a range of product categories worldwide. 

Depending on the type of device or product, different ratings will be used.

UL Rating

UL is a third-party certification company that conducts testing and sets the industry standard for safety for a range of product categories worldwide. 

Depending on the type of device or product, different ratings will be used. For example:

UL Listed – certification of the entire product vs. its components 

UL-Recognized – for components only – not complete, market-ready products

Different marks are used to indicate UL status by country or region, such as Canada, US and Europe.

UL-Recognized Component

Third-party testing company, UL, can’t certify an entire product based on one aspect of the electronic elements.

Therefore, individual products, like LEDs or PMIs that meet the safety standards are designated UL-recognized components.

Uniform Illumination

A goal of any light pipe’s design, uniform illumination is where the entire indicator surface has even light instead of hot spots in certain areas.

User Experience

User experience (UX) is the outcome users have with a product. Designing for the user experience should work along with designing for the user interface (UI) of the device. 

For an ideal user experience, design for an interface that is useful, usable, desirable, findable, accessible, and credible. Learn more in our UX design guide.

User Interface

A user interface is the control panel or other location where device status is communicated with an end-user. The more intuitive and seamless a user interface is, the safer the operation of that machine will be. There are many methods designers can use to enhance the user experience through the user interface.

User Interface Design

User interface (UI) design encompasses the look, feel and functionality of the device. From aesthetics to visual communication and controls, UI can really make or break a product. 

Using user-centric design (UCD) principles is a great way to develop, test and optimize an interface until the design is seamless, reliable, and intuitive.

UV-Resistant Lens

The sun’s UV rays can be damaging to equipment as well as our skin. 

UV-resistant lenses prevent PMIs from fading or discoloration in outdoor applications and can help extend their life and maintain accurate status indication.