LiftMaster K94-36411 Piezo Alarm for Gate Operators

Piezo Audio Indicator for LiftMaster Swing & Overhead Operators

The LiftMaster K94-36411 is a factory-original Piezo alarm indicator designed for use with select LiftMaster swing gate and overhead gate operator systems. This compact, low-current alarm emits an audible alert during gate activation or fault conditions—helping enhance perimeter awareness and operator diagnostics. Operating on 3–28VDC, this OEM audio component is commonly mounted internally within LiftMaster control boards.

Compatible with several LiftMaster models, including LA400, LA412, LA500, HCTDCU, and their UL variants, this piezo is an essential component for maintaining proper alert signaling in monitored systems.

Always confirm compatibility in your operator’s manual or parts diagram before ordering.

Key Features

• OEM LiftMaster piezo alarm indicator
• Audible alert for gate activation or system conditions
• Designed for swing gate and overhead gate operators
• Easy two-wire installation (red + / black –)
• Compact and efficient with wide voltage range (3–28VDC)
• Helps meet system alert and safety signaling requirements

Technical Specifications

• Part Number: K94-36411
• Component Type: Piezo audio indicator
• Voltage Range: 3–28VDC
• Current Draw: 20mA max
• Wire Leads: Red (+), Black (–)
• Application: Gate operator system alert
• Included: Piezo alarm module only
• Mounting: Internal; typically board-mounted
• Sound Output: Audible tone during event/fault conditions
• Compatibility:
  Compatible with LiftMaster LA400, LA400UL, LA400PKGU, LA412, LA412UL, LA412PKGU, LA500, LA500UL, LA500PKGU, HCTDCU, HCTDCULMC

Conclusion

The LiftMaster K94-36411 Piezo Alarm is a vital OEM component that restores audible signaling capability to your gate operator system. Designed to meet factory specs for swing and overhead models, this compact alert unit supports on-site awareness and system troubleshooting in security-sensitive installations.