Gold Member Since 2010
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Ningbo Sentek Electronics Co., Ltd.

Heat Detector, Fixed Temperature Detector, Fire Alarm manufacturer / supplier in China, offering Heat Detector, Tamper Switch Alarm, UL Recessed Mounted Magnetic Contact Switch and so on.

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Heat Detector

FOB Price: US $4.8 / Piece
Min. Order: 500 Pieces
Min. Order FOB Price
500 Pieces US $4.8/ Piece
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Production Capacity: 10000
Transport Package: box/certon
Payment Terms: T/T

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fire & security detection
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Basic Info
  • Model NO.: HD912
  • Anti-theft Alarm System Approach: Active
  • Anti-Theft Alarm System-Wide: Point Control Alarm Detectors
  • Types of Smoke Detectors: Heat Senso
  • Infrared Sensor Installation: Ceiling
  • Specification: UL and EN54
  • HS Code: 85311000
  • Type: Smoke Detectors
  • Anti-Theft Alarm System Type: Fixed Temperature Detector
  • Anti-Theft Alarm System Distance: Common Detectors
  • Infrared Sensor Probe Type: Heat
  • Trademark: Sentek
  • Origin: China
Product Description
HD912 series heat detector with UL521 and EN54-5 approval.

Conventional Heat Detector
All of the Sentek's HD912 series detectors meet the requirements of UL521 and EN 54-5 for use in fire alarm signaling systems, which provide fast and reliable response for heat 57°C (135°F)  or Rate-of-Rise detection,  They are intended for use in 2-wire/4-wire Class A2 supervised zone circuits. The HD912 series detectors are subject to panel compatibility limits and compliance with corresponding NFPA 72E standards, local codes, and ordinances.
Product Features:

  • 2 or 4 wire models
  • Advanced detection and discrimination algorithms
  • Easy installation and maintenance
  • Sleek low-profile housing design
  • Durable sensor head, no need for replacement
  • SMD circuit board design-satisfactory quality and reliability guaranteed
  • N/C (normal/close)-N/O (normal/open)selectable relay output
  • AR (Auto Reset) function for security systems (optional for 4 wire models) Sensor base option: standard and Shottky Diode
  • Five-year limited warranty
The range includes:
HD912-2                   2 wire heat alarm
HD912-2L                 2 wire heat alarm with remote LED output
HD912-4                   4 wire heat alarm (12/24VDC)
HD912-4B                4 wire heat alarm with buzzer (12/24VDC)
HD912-4AR              4 wire heat alarm with auto-reset function (12/24VDC)
HD912-4ARB           4 wire heat alarm with auto-reset function and buzzer (12/24VDC)

Response Temperature:

57°C (135°F)

Ceiling Spacing:

50 foot rating for heat sensor

Reset Voltage:

less than 1 volt

Alarm Indicator:

LED continuously emitting red light

Remote Output:

25 mA max., diode gate

Temperature Range:

-10°C to 50°C

Permissible Current:

80mA maximum


0 to 95% RH, no condensation or icing

Alarm Contact:

(for 4-wire) NO or NC Operation, Form A: 1.0A@30VDC/0.5A@125VAC


100mm (dia) x 46mm (ht) with base


120g/set with base
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Mr. Peilin Jiang
Sales Manager
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