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SDX-551 | Notifier Fire Alarm Photoelectric Detector
- Regular price
- $299.00
- Sale price
- $299.00
- Regular price
-
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Product Description P/N: SDX-551
Description
The SDX‑551 is a plug-in, intelligent photoelectric smoke detector designed for open‑area fire protection in commercial systems.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Notifier |
| Category | Fire Safety |
| Part Number | SDX-551 |
| Subcategory | Smoke Detector |
| Installation Temperature Range | SDX-551: 32°F to 120°F (0°C to 49°C); SDX-551TH: 32°F to 100°F (0°C to 38°C) |
| Operating Humidity Range | 10% to 93% Relative Humidity (Non-Condensing) |
| Mounting Options | BX-501 (flanged), B501 (flangeless), or B501 with RMK400 (recessed kit) |
| Maximum Air Velocity | 3000 ft/min (15 m/s) |
| Voltage Range | 15 to 32 VDC Peak |
| Standby Current | 150 µA @ 24 VDC |
| LED Current (Alarm Indication) | 6 mA @ 24 VDC |
| Weight | 0.272 kgs |
Information About SDX-551
The SDX‑551 is part of Notifier’s legacy line of intelligent photoelectric smoke detectors, designed for precise and early detection of smoldering fires in open-area environments. Engineered for compatibility with Notifier's addressable control panels like the AM2020, AFP1010, and NFS-3030, the SDX‑551 communicates real-time smoke levels using analog signaling via the SLC loop. Its low-profile, plug-in form factor allows fast installation into standard Notifier detector bases, while built-in 360° bi-color LEDs provide visual status from any direction. The optional SDX‑551TH model includes thermal detection for environments requiring both smoke and heat sensing. Though discontinued, the SDX‑551 remains a dependable component in legacy intelligent fire alarm systems.
Key Features:
- Photoelectric Sensing: Utilizes a refined optical chamber to detect smoldering fires with minimal false alarms.
- Addressable Analog Communication: Sends continuous real-time smoke level data to compatible Notifier panels for detailed event reporting.
- Plug-In Design: Easily installs into BX‑501 or B501 bases with twist-lock mounting, supporting rapid deployment and serviceability.
- 360° Visible LEDs: Bi-color status indicators provide polling and alarm visibility from any angle; remote control via panel.
- Thermal Variant Available: SDX‑551TH includes a fixed 135°F thermal sensor for environments requiring dual detection.
- Flexible Mounting: Supports flanged and flangeless base options, with optional recessed mounting using RMK400.
- Environmental Durability: Operates from 32°F to 120°F with up to 93% relative humidity; approved for air velocities up to 3000 ft/min.
- Low Current Draw: 150 µA in standby, 6 mA in alarm state at 24 VDC for energy-efficient operation.
The Notifier SDX‑551 delivered reliable and intelligent smoke detection for a wide range of applications. Its combination of addressable features, optical accuracy, and legacy panel support ensures it remains a vital component in many long-standing fire alarm systems.
Description
The SDX‑551 is a plug-in, intelligent photoelectric smoke detector designed for open‑area fire protection in commercial systems.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Notifier |
| Category | Fire Safety |
| Part Number | SDX-551 |
| Subcategory | Smoke Detector |
| Installation Temperature Range | SDX-551: 32°F to 120°F (0°C to 49°C); SDX-551TH: 32°F to 100°F (0°C to 38°C) |
| Operating Humidity Range | 10% to 93% Relative Humidity (Non-Condensing) |
| Mounting Options | BX-501 (flanged), B501 (flangeless), or B501 with RMK400 (recessed kit) |
| Maximum Air Velocity | 3000 ft/min (15 m/s) |
| Voltage Range | 15 to 32 VDC Peak |
| Standby Current | 150 µA @ 24 VDC |
| LED Current (Alarm Indication) | 6 mA @ 24 VDC |
| Weight | 0.272 kgs |
Information About SDX-551
The SDX‑551 is part of Notifier’s legacy line of intelligent photoelectric smoke detectors, designed for precise and early detection of smoldering fires in open-area environments. Engineered for compatibility with Notifier's addressable control panels like the AM2020, AFP1010, and NFS-3030, the SDX‑551 communicates real-time smoke levels using analog signaling via the SLC loop. Its low-profile, plug-in form factor allows fast installation into standard Notifier detector bases, while built-in 360° bi-color LEDs provide visual status from any direction. The optional SDX‑551TH model includes thermal detection for environments requiring both smoke and heat sensing. Though discontinued, the SDX‑551 remains a dependable component in legacy intelligent fire alarm systems.
Key Features:
- Photoelectric Sensing: Utilizes a refined optical chamber to detect smoldering fires with minimal false alarms.
- Addressable Analog Communication: Sends continuous real-time smoke level data to compatible Notifier panels for detailed event reporting.
- Plug-In Design: Easily installs into BX‑501 or B501 bases with twist-lock mounting, supporting rapid deployment and serviceability.
- 360° Visible LEDs: Bi-color status indicators provide polling and alarm visibility from any angle; remote control via panel.
- Thermal Variant Available: SDX‑551TH includes a fixed 135°F thermal sensor for environments requiring dual detection.
- Flexible Mounting: Supports flanged and flangeless base options, with optional recessed mounting using RMK400.
- Environmental Durability: Operates from 32°F to 120°F with up to 93% relative humidity; approved for air velocities up to 3000 ft/min.
- Low Current Draw: 150 µA in standby, 6 mA in alarm state at 24 VDC for energy-efficient operation.
The Notifier SDX‑551 delivered reliable and intelligent smoke detection for a wide range of applications. Its combination of addressable features, optical accuracy, and legacy panel support ensures it remains a vital component in many long-standing fire alarm systems.
