System Sensor HRL Wall Horn No Marking Red

The System Sensor HRL Wall Horn is an audible notification appliance designed for use with compatible commercial fire alarm systems. As part of the L-Series notification appliance family, the HRL combines modern aesthetics with dependable audible notification while, at the same time, supporting compatibility with a variety of commercial notification appliance circuits. Additionally, its red housing with a plain, no-marking faceplate provides a clean appearance suitable for installations where custom labeling or unmarked notification appliances are preferred.

Designed for indoor wall-mounted applications, the HRL features a low-profile housing, plug-in installation design, and selectable horn output options. Furthermore, the appliance utilizes a universal mounting plate with an onboard shorting spring, thereby supporting efficient installation and wiring verification before the horn is mounted. As a result, the HRL is well suited for new construction, renovation projects, and replacement applications where compatibility has been confirmed.

Product Functions

The System Sensor HRL performs several important functions within compatible commercial fire alarm systems, including:

• Providing audible notification through an integrated electronic horn
• Supporting wall-mounted indoor applications
• Operating with compatible 12 VDC or 24 VDC notification appliance circuits
• Offering selectable horn tones and volume settings
• Supporting synchronization with compatible System Sensor synchronization modules
• Providing dependable audible notification within compatible commercial fire alarm systems

Features & Benefits

Selectable Horn Output

The HRL features a rotary switch that allows selection of multiple horn tones and two volume settings. Additionally, this flexibility allows the appliance to accommodate a variety of compatible commercial notification applications.

Low-Profile Design

Its compact housing provides a clean, modern appearance suitable for commercial interiors. Furthermore, the low-profile design minimizes protrusion from the wall while maintaining dependable audible performance.

Universal Mounting Plate

The included universal mounting plate incorporates an onboard shorting spring that allows circuit continuity testing before the device is installed. Consequently, installation and maintenance can be completed more efficiently.

Tamper-Resistant Construction

The HRL is manufactured with tamper-resistant features designed for commercial environments. Additionally, its durable construction supports long-term operation in indoor applications.

Flexible Voltage Compatibility

The horn supports operation on compatible regulated 12 VDC and 24 VDC notification appliance circuits. Moreover, automatic voltage selection simplifies integration into compatible systems.

Commercial-Grade Construction

Designed as part of the System Sensor L-Series, the HRL combines dependable audible notification with durable construction for commercial applications. As a result, it is well suited for office buildings, schools, healthcare facilities, retail spaces, and other indoor environments.

Technical Specifications

Manufacturer: System Sensor

Model: HRL

Series: L-Series

Product Type: Wall Horn

Notification Type: Audible

Housing Color: Red

Marking: None (No Marking)

Mounting: Wall

Application: Indoor

Operating Voltage: Regulated 12 VDC/FWR or 24 VDC/FWR

Operating Voltage Range:

• 8–17.5 VDC (12 V nominal)
• 16–33 VDC (24 V nominal)

Sound Output: 88+ dBA at 16 VDC

Tone Selection: Rotary Switch

Volume Settings: Two Selectable Levels

Operating Temperature: 32°F to 120°F (0°C to 49°C)

Humidity: 10% to 93% Non-Condensing

Dimensions:

• Height: 5.6 in.
• Width: 4.7 in.
• Depth: 1.25 in.

Construction: Commercial-Grade Plastic

Specifications should be verified with the manufacturer’s documentation for the intended application.

Typical Applications

The System Sensor HRL is commonly used in compatible commercial fire alarm systems serving:

• Office buildings
• Educational facilities
• Healthcare facilities
• Hotels
• Retail centers
• Government buildings
• Warehouses
• Manufacturing facilities
• Commercial campuses
• Institutional buildings

Application suitability should always be verified according to the system design and project requirements.

Compatibility Information

The System Sensor HRL is designed for operation with compatible commercial fire alarm control panels and notification appliance circuits. Additionally, the horn supports synchronization when used with compatible System Sensor synchronization modules and is electrically compatible with legacy SpectrAlert® and SpectrAlert Advance® notification appliances. Before purchasing or installing the device, however, compatibility should always be verified with the intended fire alarm control panel and notification circuit. Furthermore, confirming compatibility helps support proper communication between system components, thereby contributing to the intended operation of the overall fire alarm system.

Why Choose the System Sensor HRL?

The System Sensor HRL Wall Horn combines dependable audible notification, selectable tone and volume settings, and a modern low-profile design in a durable commercial notification appliance. Additionally, its universal mounting plate, automatic voltage compatibility, and synchronization support provide flexibility for a variety of compatible commercial fire alarm applications. As a result, it offers a practical solution for facilities requiring a compatible wall-mounted audible notification appliance.

HRL