The BAU-4 beam alignment unit automatically and accurately adjusts the optical axis. This allows peak performance and give one technician the ability to align a 650ft. (200m) SL Series detector without additional help.

The OPTEX AX-100/200 Photoelectric Detector Series is the next step in Outdoor Detection and will satisfy all the needs of both users and installers. OPTEX unique technology and design provide a wide range of functions that greatly simplify installation and maintain reliable performance even in many adverse weather or environmental conditions.
Replacment Lens (Covers) Optex part number is AX-ALPHAPLUSCVR. (Sold Individually

Features:

• Clear Viewfinder Visibility
• Fine Angle Adjustment for Alignment
• Lightning & Surge Protection
• Rain, Dust & Insect Protection
• Frost & Dew Protection
• High Grade Aspherical Lens
• Twin Synchronized Pulsed Beams Designed for Greater Stability
• 99.5% Beam Blocking Stability
• A.G.C. (Automatic Gain Control) Circuit
• Adjustable Beam Interruption Period
• Form C Relay Providing More Flexibility
• Highly Durable & Heat-Resistant Housing Cover & Chassis
• Stainless Steel Screws & Back Plate