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System Sensor 5551B Heat Detector (NEW)

System Sensor 5551B Heat Detector (NEW)

System Sensor 5551B: Intelligent Fixed Temperature Thermal Sensor

The System Sensor 5551B is an advanced intelligent thermal sensor designed to provide reliable fixed temperature detection in fire alarm systems. Featuring a unique dual thermistor sensor, the 5551B offers a fixed temperature alarm at 135°F, ensuring quick detection of heat events while offering superior performance and durability.

Key Features:

  • Fixed Temperature Alarm: The 5551B is set to trigger an alarm when the temperature reaches 135°F, providing early detection of potential fire hazards.

  • Dual Thermistor Sensor Technology: Incorporates advanced dual thermistor sensing technology, offering high accuracy and reliability in heat detection.

  • Low Standby Current: Designed for energy efficiency with a low standby current of 200 µA, helping to reduce overall system power consumption.

  • Compact and Durable Design: The sleek, compact design allows easy installation and integration into various environments, while its durable construction ensures reliable performance over time.

  • Shielded Electronics: Provides immunity to electrical noise, ensuring stable communication with the fire alarm control panel even in challenging environments.

  • Easy Installation and Maintenance: The 5551B features a plug-in head that simplifies installation and maintenance, along with a built-in tamper-resistant feature for added security.

  • Sealed Against Dirt and Insects: Designed with protection against dirt, insects, and back pressure, ensuring continued reliable operation in diverse environments.

  • Compatible with System Sensor Bases: Easily integrates with System Sensor’s B501 or B501B bases for a seamless installation experience.

Specifications:

  • Operating Voltage: 15–32 VDC
  • Standby Current: 200 µA
  • Temperature Range: 32°F to 100°F (0°C to 38°C)
  • Alarm Temperature: 135°F
  • Sensor Type: Dual thermistors for fixed temperature detection
  • Humidity Range: 10% to 93% RH (non-condensing)
  • Dimensions: Height: 2.1” (5.3 cm), Diameter: 4.0” (10.2 cm)

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