AC220V Wired Commercial Fire Photoelectric Smoke & NTC Heat Combined Detector

1. Key Features of SUMRING SR-803-2 Smoke Heat Detector

Tired of frequent battery replacement for battery-operated fire alarms? Our SUMRING SR-803-2 hardwired smoke heat detector connects straight to AC220V 50Hz mains power, delivering non-stop round-the-clock fire safety protection without power failure risks. With low power consumption design, the detector runs stably in harsh environments ranging from -10°C to +55°C, tolerating up to 90% non-condensing relative humidity. Its compact Φ100mm × 54mm ABS flame-retardant plastic body enables simple ceiling installation with a maximum mounting height of 3.5 meters, covering a detection area of up to 20 square meters per unit.

2.Complete Technical Specifications of SR-803-2 Hardwired Fire Alarm

3 .Product Advantages

• Dual Photoelectric Smoke & NTC Heat Sensing: Detects both smoldering smoke and abnormal high temperature, triggers alarm at 54℃–65℃ for dual fire hazard prevention.
• Dual Alarm Indication: ≥80dB loud audible buzzer plus flashing LED light, delivers clear visual and audio warning signals.
• Optional NO/NC Relay Switch Signal Output: Compatible with fire alarm control panels for centralized fire monitoring systems.
• Multiple Smart Safety Functions: Built-in self-test function for regular equipment health checks, auto reset design for easy post-alarm recovery, dustproof and insect-proof internal structure to avoid false alarms.
• Strong Anti-Interference Design: Metal anti-white-light shielding structure and SMT automated welding circuit eliminate light interference and guarantee stable long-term operation.
• Durable Flame-Retardant ABS Material: High-temperature resistant, fire-proof plastic housing improves service life and safety. 
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4 Wide Application Scenarios for AC220V Mains Smoke Heat Sensor

English This AC220V hardwired smoke heat composite detector is widely applicable to commercial and residential buildings: Hotel guest rooms & public areas, office buildings, storage warehouses, apartment residential buildings, shopping malls and engineering construction fire safety projects.

5 .Supply Advantage

English We support factory direct wholesale, large-scale engineering bulk supply and sample test orders. Stable stock, reliable product quality and complete technical parameter documentation are available for all global buyers and fire engineering contractors.

FAQ AC 220V wired smoke & heat detector SR-803-2

Q: What sensors does this detector use?
A: Photoelectric smoke + NTC heat dual sensor with MCU chip, metal anti-interference shield.

Q: Does it have relay output and auto reset?
A: Optional NO/NC relay output, auto reset after hazard clear, plus self-test function.

Q: What’s the installation coverage?
A: Max 3.5m mounting height, single unit covers ≤20㎡, install on ceiling away from vents.

Q: Where can this detector be used?
A: Hotels, offices, warehouses, apartments and all construction engineering projects.

Q: Do you support customization and samples?
A: OEM&ODM available, accept bulk project orders and provide test samples quickly.

Q: What’s your product advantage over common smoke detectors?
A: Dual sensor, stable SMT circuit, auto reset & self-test; ordinary ones only single sensor with poor stability.