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SR 220 Smoke detector
- $178.00
The Gentex SR220 is a 220VAC, multi-criteria photoelectric smoke alarm designed for dependable early fire detection in residential and commercial living environments. It includes a 9V battery backup, a built-in auxiliary relay (Form A/Form C), tandem interconnect capability with compatible alarms, and a high-output audible horn rated at 85 dBA at 10 feet. The unit features advanced dual-wavelength smoke sensing and temperature detection to reduce nuisance alarms while providing fast fire warning.
What's inside the box? : 1x SR220 alarm unit , 1x mounting base/bracket, 1x wiring harness, 1x user/installation manual and a dust-cover to prevent contamination during installation.
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OVERVIEW
The SR220 uses dual photoelectric light-scatter technology combined with a temperature sensor to quickly detect smoke from different fire types while minimizing false alarms from dust, steam, or cooking smoke. The built-in relay allows integration with external systems such as door releases, building automation systems, or remote alert accessories.
This model supports tandem interconnection, meaning if one connected alarm activates, all units in the network will sound, improving evacuation awareness across larger properties.
The SR220 is suitable for:
- Homes & Apartments
- Hotels & Serviced Residences
- Small Residential-Type Commercial Units
Key Features
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220VAC, 50/60Hz operation
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Multi-criteria photoelectric smoke detection
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1 Form A / 1 Form C relay for auxiliary control
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9V battery backup for power outage protection
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Tandem interconnection up to 12 alarms
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Dual-wavelength sensor with temperature analysis
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Loud 85 dBA evacuation horn (T3 pattern)
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LED status indicators for power, alarm, and faults
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Silence/test button for alarm verification and hush mode
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End-of-life and troubleshooting indicators
| Model | SR 220 |
| Type | Multi-Criteria Photoelectric Smoke Alarm |
| Operating Voltage | 220VAC, 50/60Hz |
| Backup Power | 9V Alkaline Battery |
| Operating Current | 0.135A |
| Alarm Output | 85 dBA minimum at 10 ft (T3 signal) |
| Relay Contacts | 1 Form A / 1 Form C |
| Operating Temp Range | approx. 4°C to 38°C |
| Status Indicators | Green (power), Red (alarm), Amber (fault/end-of-life) |
| Compliance | UL 217 Listed |