The Genie 34879A.S Series II STB Bracket is a genuine OEM replacement mounting bracket for Genie Safe-T-Beam (STB) photo-eye sensors used on Series II residential garage door openers. Designed to securely position the infrared safety sensors at the base of the door opening, this bracket helps maintain proper alignment of the beam so the opener can detect obstructions and reverse in accordance with UL 325 safety requirements. It’s ideal as a replacement part when the original sensor bracket is bent, missing, or unable to hold alignment, and is intended for use with Genie openers that utilize the Series II Safe-T-Beam system.
The bracket supports common installation methods on the garage door track or jamb and provides the adjustability needed to aim the sending and receiving eyes until their indicator LEDs confirm alignment. No programming is required when replacing the bracket; simply transfer the existing sensor to the new bracket, route the wires as originally installed, and test the safety reversal after setup. For best results, confirm “Series II” compatibility in your opener’s manual or on the sensor labels before ordering. Keywords: Genie 34879A.S, Series II Safe-T-Beam bracket, STB photo eye mounting bracket, OEM sensor bracket, garage door opener safety sensor replacement, residential Genie opener compatibility.