The Hochiki NS4-221 is a professional-grade 2-wire detector base engineered for comprehensive fire detection and notification systems in complex commercial environments. Designed for seamless integration with addressable fire alarm panels, this 4-inch base provides reliable signal transmission and device mounting for advanced smoke and heat detection technologies. Fire alarm professionals will appreciate its robust construction and compatibility with multiple Hochiki detection devices across various commercial and institutional settings.
Optimized for challenging commercial applications, the NS4-221 detector base supports critical infrastructure monitoring in environments ranging from office complexes and healthcare facilities to educational institutions and industrial installations. Its precision-engineered design ensures consistent performance in networked fire alarm systems, delivering dependable communication between detectors and central alarm panels.
Key Features
- Full compatibility with Hochiki addressable detection devices and control panels
- Meets rigorous NFPA 72 fire alarm installation and performance standards
- UL 268 and UL 464 listed for professional fire detection applications
- Low-profile 4-inch design facilitates streamlined mounting in suspended ceilings and exposed infrastructure
- 24 VDC operational voltage supports standard commercial fire alarm system configurations
- Enhanced electrical connectivity with precision-machined terminal connections
Specifications
- Voltage: 24 VDC
- Operating Temperature: 32°F to 120°F (0°C to 49°C)
- Base Material: High-temperature flame-retardant polymer
- Mounting: Standard 4-inch electrical box compatibility
- Dimensions: Approximately 4.25″ diameter
- Agency Listings: UL, FM, CSFM
Ideal for integration with commercial fire alarm systems utilizing Hochiki addressable detection protocols, the NS4-221 provides fire protection professionals with a reliable, standards-compliant detector mounting solution. Engineered for seamless performance in diverse environmental conditions, this detector base represents a critical component in comprehensive life safety infrastructure.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 4 × 4 × 1 in |
| Condition | New |
| Manufacturers | Hochiki |
| Part Type | Detector Base |







