LiftMaster 50-HERK2 Vehicle & Pedestrian Microwave Motion Detector for Commercial Doors

The LiftMaster 50-HERK2 is an advanced microwave motion detector designed for commercial overhead doors and gates. It detects moving traffic approaching or leaving the doorway and can differentiate between vehicles and pedestrians, helping automate door operation while reducing unnecessary openings.

Unlike basic motion sensors that react to nearly anything moving nearby, the 50-HERK2 includes cross-traffic optimization to help ignore traffic passing across the doorway rather than approaching it. This makes it especially useful for warehouses, automotive facilities, loading areas, parking structures, and other busy commercial environments.

Product Features

• Microwave motion detector for commercial doors and gates

• Differentiates between vehicle and pedestrian traffic

• Detects movement toward or away from the door

• Cross-traffic optimization helps prevent unwanted door openings

• Slow-motion detection capability

• Two independently programmable relay outputs

• Pulse-on-exit functionality can be used to initiate door closing after a vehicle leaves

• Adjustable detection field and sensitivity

• Maximum detection field approximately 20' × 16'

• Maximum mounting height approximately 23 ft

• Adjustable mounting angle up to approximately 45°

• Designed for professional commercial-door installations

Specifications

• Manufacturer: LiftMaster

• Model: 50-HERK2

• Product Type: Microwave Motion Detector

• Detection Technology: Planar Microwave / Doppler Radar

• Vehicle / Pedestrian Differentiation: Yes

• Maximum Detection Field: 20' × 16'

• Maximum Mounting Height: 23 ft

• Maximum Mounting Angle: 45°

• Relay Outputs: 2 independently programmable outputs

• Power Requirement: 24VAC from compatible operator or separate power source

• Pre-Wired Cable: Approximately 23 ft / 7 m

• Application: Commercial Doors & Gates

Common Applications

Ideal for:

• Commercial sectional overhead doors

• Industrial garage doors

• Warehouse entrances

• Loading and shipping areas

• Automotive dealerships

• Vehicle service departments

• Car washes

• Fleet maintenance facilities

• Parking structures

• Distribution centers

• Commercial gates

• High-traffic industrial doorways

Vehicle & Pedestrian Differentiation

The 50-HERK2 can distinguish between people and vehicles, allowing the control system to respond differently depending on the type of traffic detected.

This can help prevent a large commercial overhead door from opening every time a pedestrian walks nearby while still allowing automatic activation when an approaching vehicle is detected.

Cross-Traffic Optimization

Busy warehouses and commercial facilities often have vehicles or pedestrians traveling parallel to a doorway.

Cross-traffic optimization helps reduce unwanted door activation caused by traffic simply passing across the sensor's detection area rather than approaching the door.

Automatic Door Operation

When properly connected and programmed with a compatible commercial door operator or control system, the 50-HERK2 can provide automatic activation when approaching traffic is detected.

The sensor also supports pulse-on-exit functionality that can be used as part of a properly configured system to initiate closing after a vehicle leaves the detection area.

Compatibility

The LiftMaster 50-HERK2 is designed for commercial overhead door and gate applications.

Compatibility depends on the operator or control system, available inputs, required relay configuration, accessory power supply, and desired operating sequence.

Requires 24VAC power from the operator or another compatible power source.

Do not assume compatibility based only on the LiftMaster brand name. Confirm the exact commercial operator and control-board requirements before ordering.

Package Contents

Includes:

• LiftMaster 50-HERK2 Microwave Motion Detector

• Pre-wired approximately 23' / 7 m cable

• Mounting bracket

• Mounting template

• Installation instructions

The 50-HERK-RC2 programming remote is not included and is sold separately. The remote is required to access the complete set of remote-programmable sensor functions.

Important Safety Information

The 50-HERK2 is an activation motion detector and does not replace required monitored entrapment-protection devices.

Commercial door operators must continue to use all required photo eyes, monitored sensing edges, light curtains, or other approved entrapment-protection devices according to the operator manufacturer's instructions and applicable safety requirements.

Installation and programming should be performed by trained commercial-door or access-control professionals.