This means that every gate operator that has been produced after 2016 has to be UL tested and approved. This means that all of the operators have to have a monitored safety device attached or they will not function. Usually a monitored safety device will either be a photo eye or an edge sensor. Some installers have been know to cut corners and not install these required safety devices, or they have rigged them up so they serve no safety function at all. It is extremely important that these safety device be hooked up and continue to function properly. The whole purpose for having these standards is so people are protected from the power of a closing gate. Without these devices countless people have been seriously injured by automatic gates, and in some instances some people have been killed because there were no safety devices hooked up to the gate.
If you would like to read about some of these tragic accidents you can click on the link to an article by Safetyresearch.net. Just picture a child trying to run inside of a closing gate before it shuts, but than they trip and they fall in the path of the gate. Without a monitored safety device that child could get seriously injured, but with a monitored safety device the gate would have sensed that the child was there and it would have reversed. Please make sure that a monitored safety device is installed on your gate system to ensure the safety of everyone who goes through the gate.