DAYTECH SM21 Smoke Sensor Wireless Smoke Detector Fire Detector Photoelectric Fire Alarm Protection

DAYTECH Smoke Detector Sensor Wireless Independent Fire Smart Alarm Sensor With Battery

Product Introduction

This product, named Photoelectric detector, detects smoke by a couple of infrared diodes.

The principle of detecting is that granules in the smoke can reflect infrared light. Infrared diodes are placed in the special chamber. The chamber can shield external light but doesn't affect the smoke entering it.

It reacts very quickly to visible smoke released by smoldering fire and flaming fire, making it suitable for fire alarms in houses, factories, shopping malls, restaurants, office buildings, banks, libraries, etc.

Main Features

• Attractive and modern design suitable for residential and commercial applications
• Dustproof, mothproof, and anti-light interference design
• Superior detection sensitivity, MCU processing to eliminate false alarms
• More than 2 years battery life (depending on the battery type) with easy battery replacement
• Sound & flash once a fire is sensed (smoke, low battery)
• Loud (100dB) alarm sound at 3m (10ft)
• Simple wall or ceiling installation, with bracket

Specification

• Working voltage: DC9V
• Current: Quiescent current ≤ 12uA, Alarm current ≤ 20mA
• Alarm loudness: ≥85dB/3m
• Normal condition: LED (red) flashes every 43 seconds
• Alarm mode: sound/light (constantly)
• Low battery test: <7.35V, make an alarm sound every 43 seconds
• Working temperature: -10℃ to +40℃
• Ambient humidity: ≤95%RH (no condensation)

Notes

• The product is not suitable for installation in kitchens, bathrooms, or other places with high-temperature and humidity.
• There shouldn't be any obstructions that block the light or sound in front of the product.
• If the battery is installed in reverse polarity, the product can't work properly and may be damaged.

DAYTECH SM21 Smoke Sensor Wireless Smoke Detector, Fire Detector, Photoelectric Battery Powered LED Indicator & Silence Button, Low Battery Alert, Fire Alarm Protection for Hotels, Restaurants, Clinics, Hospitals, Churches, Schools, Workplaces, Houses, Factories, Malls.