Dahua Technology

Dahua Smoke Detector HY-SA21A-W2

Rs. 3,200.00

~~Rs. 3,840.00~~ Rs. 3,200.00

Sale Sold out

Overview

The Dahua HY-SA21A-W2 Wireless Smoke Detector is an intelligent photoelectric smoke alarm designed to provide early fire detection and reliable protection for residential and commercial environments. Utilizing advanced split-spectrum sensor technology, the detector offers high sensitivity to smoke while reducing unwanted alarms.

The device combines smoke detection and alarm functions in a single unit and can transmit alarm events to compatible Dahua wireless alarm hubs. Instant notifications can be viewed through the DMSS mobile application, allowing users to react quickly to fire emergencies.

Key Features

✔ Split-spectrum photoelectric smoke sensing technology

✔ Loud alarm output of 85–90 dB(A) at 3 m

✔ Visual and audible alarm indication

✔ Test and silence functions integrated into one button

✔ Two-way wireless communication

✔ AES128 encryption for secure transmission

✔ Frequency hopping technology

✔ Low battery warning and fault indication

✔ Low quiescent current consumption

✔ Surface-mount device (SMD) circuit design

✔ Communication range up to 1,000 m in open space

✔ Battery life up to 3 years

Why Choose Dahua HY-SA21A-W2?

Early Fire Detection

Advanced photoelectric sensing technology provides reliable smoke detection for enhanced life and property protection.

Easy Operation

A single button allows users to test the detector and temporarily silence nuisance alarms.

Reliable Wireless Communication

Two-way communication with AES128 encryption ensures secure and dependable signal transmission to the alarm hub.

Long Battery Life

The replaceable CR123A lithium battery provides up to three years of operation, minimizing maintenance requirements.

Instant Alarm Notifications

Compatible with Dahua wireless alarm systems, enabling real-time alarm notifications through the DMSS mobile application.

Technical Specifications

Feature	Specification
Product Type	Wireless Smoke Detector
Detection Principle	Photoelectric Smoke Detection
Sensor Technology	Split-Spectrum Sensor Technology
Sampling Period	10 Seconds
Alarm Type	Smoke Alarm, Fault Warning, Low Battery Warning
Alarm Mode	Visual and Audible Alarm
Alarm Volume	85–90 dB(A) at 3 m
Silence Function	Supported
Silence Duration	Approximately 12 Minutes
Alarm Response Threshold	0.2 dB/m – 0.3 dB/m
Indicator LEDs	Red and Green LED Indicators
Coverage Area	20 m² – 40 m² (Ceiling Height Below 8 m)
Communication Mechanism	Two-Way Wireless Communication
Encryption Mode	AES128
Frequency Hopping	Supported
Wireless Frequency	433.1 MHz – 434.6 MHz
Communication Distance	Up to 1,000 m (Open Area)
Power Supply	1 × 3V CR123A Lithium Battery (Replaceable)
Battery Life	Up to 3 Years
Monitoring Current	≤ 35 μA
Alarm Current	≤ 35 mA
Operating Environment	Indoor
Operating Temperature	-10°C to +55°C
Operating Humidity	≤ 95% RH (Non-Condensing)
Installation	Ceiling Mount
Casing Material	ABS
Dimensions	Ø98 mm × 43.1 mm
Weight	140 g
Certifications	TÜV, CE
Compliance Standard	EN 14604:2005 + AC:2008