Hw-F335 Fire Alarm with RS-485 Protocol Supported

• Customization: Available
• Function Type: Flame Sensor Alarm
• Detection Type: Flame Sensor Alarm
• Model NO.: HW-F335
• Output Signal Type: Analog Type
• Production Process: Integration
• Material: Plastic
• IP Rating: IP65
• Certification: RoHS
• Customized: Customized
• Model: Hw-F335
• Power Supply: 12V
• Sensing Distance: 1~30m
• Fire Alarm Threshold: 300*300mm
• Fire Alarm Sending Delay Time: 5s~10s
• Sensing Angle: 10-110°
• Sensor Probe Wavelength: 380-750nm
• Product Dimensions: 54*45*25mm
• Operating Temperature: -20----+70
• Transport Package: Plastic
• Specification: 55 x 55 x 70mm
• Origin: China
• Package Size: 18.00cm * 18.00cm * 8.00cm
• Package Gross Weight: 0.800kg

Product Description

I. Fire Alarm User Manual
The HW-F335 is a civilian fire alarm device. It uses a three-band sensing method combining infrared, ultraviolet, and thermal radiation, and employs the Curie temperature of lithium tantalum crystal material. It is suitable for flame temperatures ranging from 250-4000ºC and provides a clear high-contrast polarity change for fire early warning. The detector has stable performance and can quickly detect and trigger an alarm within 5-10 seconds when a fire occurs. The product can be set up by scanning a QR code with a mobile phone and is used for various open flame detection fire early warning applications, including fire alarms, security alarms, industrial plants, mining areas, chemical combustible material alarms, residential homes, charging piles, gas stations, chargers, equipment, and more.
II.  Setup Instructions
1.Power supply via RS-8 twisted-pair cable, ceiling-mounted detection method in fire escape passages.
2.Multi-channel output: 485A · 485B · high-level fire alarm signal · dry contact relay output for fire alarm.
3.Enclosed in a metal housing.
4.Highly sensitive outdoor fire detection, open for secondary development.
5.Wide range of applications, especially suitable for outdoor scenarios.
6.Immunity to electromagnetic radiation, sunlight, and background thermal radiation.
7.Passive operation, low power consumption, multi-layer protection, and ultra-long service life design.

III. Alarm threshold: Refer to the chart:

Model	HW-F335		485 Flame Alarm
Power supply	12v/500mA		12v Relay
Work indicator light	Blue: The indicator light shows normal operation. Red: Alarm indicator light.
Power consumption	<3w
Sensing distance	1-30m	The larger the fire, the faster the detection
Fire alarm threshold	300mmx300mm	Area fire flame, size alarm threshold
Sensor	39----43----51	Three-band flame detection
Output 3-channel signal	458A - 485B	Relay switch output	high-level output
Output port	1-2.54-4	2-2.54-4	PCB silkscreen
Network cable	RS8 core network cable, 200mm in length.
Blackbody threshold	500k	1HZ 0.3-3BPS	default500K
Fire alarm sending time	5s-10s	Fire alarm duration: 3-5 seconds	Repeatable triggering
Sensing angle	10-110°		Window angle
Sensor probe wavelength	380-750nm
Metal casing accessories	host x 1pcs	Lower casing x 1pcs	power supply x 1pcs
	upper casing x 1pcs	Screw decorative ringx 1pcs	Screw packagex 1pcs
Module size	54mmx45mmx25mm		Single module size
Operating temperature	-20----+70

IV. Output port definition

Line number	Color	definition
1	Orange-white	VCC
2	Orange	GND
3	Green-white	485A+
4	Blue	Relay K
5	Blue-white	RelayON
6	Green	485B-
7	Brown-white	Relay NC
8	Brown	Fire alarm high level OUT

V. Detection Range Schematic and Response Time Definitions


The fire alarm detection time is as follows: when the triggering conditions are met, the fire will continue to output a trigger signal as long as the fire is extinguished, indicated by a constantly lit red LED. When the flame disappears, the flame sensor source will reset in approximately 5 seconds, returning to sentinel detection mode. This detection time is determined when a fire occurs.
1. Avoid installation in areas with heavy steam/oil fume, such as kitchens and bathrooms, and keep away from air conditioning vents and dust accumulation areas to prevent false alarms.
2. Clean the optical sensor quarterly with a soft brush to prevent dust from obstructing detection accuracy.
3. Monthly check the audible and visual alarms and power connection by pressing the test button to ensure timely response in case of fire.