The most rugged and durable door control switches available, Highpower Security push-button exit release pushplates are used as an exit device.
Their time-delayed versions (PNZ models) use our proprietary ultra-rugged pneumatic timer designs. All pneumatic Highpower pushplate products are Listed UL508 / CSA C22.2 No 14-10 with MET LABS, File # E113051. These high-precision push button timers are used to ensure compliance with building and safety requirements, ensuring the door remains open/unlocked for the correct amount of time.