System Sensor MHW Sensor

The System Sensor MHW is a high-performance SpectrAlert Advance mini-horn designed for critical life safety applications including gas and smoke detection notification. This white mini-horn sounder features dual-voltage capability, operating on either 12Vdc or 24Vdc regulated power supplies or full-wave rectified (FWR) unfiltered circuits. Engineers and contractors specify the MHW for its compact footprint and field selectable sounder outputs, allowing for high or low volume settings and temporal or continuous tones. Its wide operating voltage range of 8 to 33 volts ensures stable performance across various NAC circuits. For simplified fire alarm system installation, the System Sensor MHW plate-mounts directly to a standard single-gang backbox, maintaining a low-profile aesthetic in hotels, motels, and residential facilities. When integrated with an MDL3 sync module, these units support full synchronization to meet strict NFPA 72 requirements for primary and secondary signaling.

Key Benefits of the System Sensor MHW

• Dual-Voltage Versatility: Native support for 12V and 24V systems reduces inventory complexity for multi-phase projects.
• Customizable NAC Notification: On-site selection between high/low decibel levels and temporal 3 or continuous patterns via a rear-mounted plug.
• Aesthetic Integration: Small footprint designed for single-gang mounting, making it ideal for finished interior spaces where large horns are visually intrusive.
• Legacy Compatibility: Mechanically and electrically compatible with older PA400 series mini-alert sounders for easy drop-in replacement.
• Optimized Current Draw: Engineered for low current consumption, allowing for more devices per notification appliance circuit (NAC) loop.

Common Questions About the MHW Mini-Horn

How do I change the tone or volume on the MHW?
The System Sensor MHW uses a physical jump-plug on the back of the device. You can configure the output for high/low volume and switch between temporal and non-temporal tones before mounting the unit to the single-gang box.

Is the System Sensor MHW compatible with synchronization modules?
Yes, the SpectrAlert Advance mini-horn is fully compatible with the MDL3 sync module (or the MDL3W/MDL3R variants) and any fire alarm control panel utilizing the System Sensor synchronization protocol.

Can this mini-horn be surface mounted?
The MHW is primarily designed for flush mounting to a single-gang backbox. For surface applications, a deep single-gang box (at least 2.75 inches deep) is required to provide sufficient clearance for wiring and conduit entrance.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.