System Sensor SCRHK Outdoor Ceiling Strobe

The System Sensor SCRHK is a red, ceiling-mounted outdoor strobe designed to provide high-intensity visual emergency notification in commercial fire alarm systems. Part of the SpectrAlert Advance series, it offers field-selectable high-candela settings for applications requiring increased visual coverage.

The appliance is weatherproof for outdoor and exposed-area installations and includes a compatible plastic weatherproof back box. Its plug-in construction, universal mounting plate, and synchronization support help simplify installation and system maintenance. This product is intended exclusively for commercial fire alarm installations.

Product Functions

• Provides visual fire alarm notification
• Produces high-intensity flashing strobe signals
• Supports ceiling-mounted outdoor installation
• Offers field-selectable candela output
• Synchronizes with compatible notification circuits
• Provides notification for occupants with hearing impairments
• Supports supervised notification appliance circuit operation

Electrical & System Information

The SCRHK operates on compatible regulated DC or full-wave rectified notification appliance circuits. Its electrical configuration supports 24-volt commercial fire alarm applications, with operating current determined by the selected candela setting and circuit voltage.

The strobe is compatible with the System Sensor synchronization protocol and legacy SpectrAlert synchronization equipment. Always calculate notification appliance circuit loading using the current values specified in the approved product documentation.

Features

• Outdoor commercial fire alarm strobe
• Red ceiling-mount housing
• High-candela visual output
• Selectable 135, 150, 177, and 185 candela settings
• Weatherproof construction
• NEMA 4X and IP56 protection
• Clear strobe lens
• Universal mounting plate
• Built-in wiring continuity shorting spring
• Plug-in appliance design
• Synchronization capability
• Weatherproof back box included

Mounting & Design

The System Sensor SCRHK is designed for ceiling installation using the included weatherproof back box and universal mounting plate. The mounting plate allows installers to complete and test field wiring before attaching the strobe appliance.

Its plug-in construction minimizes intrusion into the electrical box and allows the strobe to be removed for inspection, testing, or replacement without disconnecting the installed field wiring. The enclosure measures approximately 6.8 inches in diameter and 2.5 inches high.

Protection & Applications

Suitable for:

• Building Entrances
• Covered Walkways
• Loading Areas
• Parking Structures
• Outdoor Equipment Areas
• Industrial Facilities
• Warehouses
• Transportation Facilities
• Commercial Properties

Compatibility

Compatible with selected:

• System Sensor Synchronization Protocol
• SpectrAlert Advance Notification Systems
• Legacy SpectrAlert Products
• Compatible Fire Alarm Control Panels
• Compatible Notification Appliance Circuits
• System Sensor Synchronization Modules
• Included Weatherproof Back Box

The SCRHK is a visual-only notification appliance and does not contain an integrated horn. Always verify control-panel compatibility, synchronization requirements, circuit voltage, current capacity, and mounting conditions before installation.

Technical Specifications

Manufacturer: System Sensor

Parent Company: Honeywell

Model: SCRHK

Series: SpectrAlert Advance

Product Type: Outdoor Ceiling Strobe

Notification Type: Visual Only

Mounting: Ceiling

Installation Location: Outdoor or Weather-Exposed Areas

Housing Color: Red

Lens Color: Clear

Candela Settings: 135, 150, 177, and 185 cd

Operating Circuit: Compatible DC or FWR Notification Appliance Circuit

Nominal System Voltage: 24 Volts

Synchronization: System Sensor Synchronization Protocol

Environmental Rating: NEMA 4X / IP56

Operating Temperature: –40°F to 151°F (–40°C to 66°C)

Dimensions: Approximately 6.8 in. Diameter × 2.5 in. High

Back Box: Plastic Weatherproof Back Box Included

Application: Outdoor Commercial Fire Alarm Systems

Product Status: Discontinued; SCRKLED is identified as a replacement model by some current distributors.

Listings: UL 1638, ULC, FM, CSFM, and MEA approvals; verify the product label and jurisdictional requirements for the specific installation.

Applications

The System Sensor SCRHK is designed for commercial fire alarm systems requiring high-intensity visual notification in outdoor or weather-exposed locations. Typical applications include covered entrances, loading docks, parking structures, industrial facilities, warehouses, exterior corridors, transportation properties, and other commercial areas where a weatherproof ceiling-mounted strobe is required.

SCRHK Datasheet