HD912 Heat Detector

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HD912 Heat Detector

Our HD912 heat detector meets the requirements of UL521 and EN 54-5. Our product provides fast and reliable response for heat over 57°C (135°F) or rate-of-rise detection. The heat detector includes 2-wire and 4-wire models, while it is subject to panel compatibility limits and compliance with corresponding NFPA 72E standards, local codes, and ordinances.

Besides, with advanced detection and discrimination algorithms, our heat detector features an easy installation and maintenance. The durable sensor head makes you to worry no more for replacement. Meanwhile the SMD circuit board is designed to satisfy quality and reliability. Our product provides N/C (normal/close)-N/O (normal/open) selectable relay output, while Auto Reset function is also offered for security systems. We also provide a five-year limited warranty to our products.

Models

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)

Technical Specifications

Model	2/4 Wire	Voltage DC(Min./Max.)	Standby Current (Max.)	Alarm Current (12/24V)	Surge Current (Max.)	Start-Up Time (Max.)	Max. Current	Cycle Time	Alarm contact	Certifi ed	Base Model No.
HD912-2	2	10~33V	45µA	50mA	100µA	30 Seconds	80mA	1-3 Seconds	—	UL/EN	P/N852001
HD912-2L	2	10~33V	45µA	50mA	100µA	30 Seconds	80mA	1-3 Seconds	—	UL/EN	P/N854001
HD912-4-12/24	4	12/24V	45µA	30mA	100µA	30 Seconds	—	1- 3Seconds	Form A	UL/EN	P/N854001
HD912-4AR-12/24	4	12/24V	45µA	30mA	100µA	30 Seconds	—	1-3 Seconds	Form A Auto Reset	CE	P/N854001
HD912-4ARB-12/24	4	12/24V	45µA	30mA	100µA	30 Seconds	—	1-3 Seconds	Form A Auto Reset	CE	P/N854001
HD912-4B-12/24	4	12/24V	45µA	30mA	100µA	30 Seconds	—	1- 3Seconds	Form A	CE	P/N854001

Detailed Information

Response Temperature	135°F(57°C) or 15°F(9.3°C)/min Rate-of-Rise
Monitoring Spacing	40 feet * 40 feet
Reset Voltage	Less than 1 volt
Alarm Indicator	LED continuously emitting red light
Remote Output	25 mA max., diode gate
Temperature Range	-10°Cto 50°C
Max. Current	80mA maximum
Humidity	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
Dimension	100mm(dia.) x 46mm (ht) with base
Weight	120g/set with base