SKU: 88075100913

DAHUA HY-SA21A-W2(868) Wireless Smoke Alarm

Sale price$450000.00 Regular price$500000.00
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Description

DAHUA HY-SA21A-W2(868) Wireless Smoke AlarmHY SA21A W2(868) Wireless Smoke Alarm > Split spectrum sensor technology > Test and silence features in one single button > Loud sound output over 85 dB(A) at 3 meters > Low quiescent current consumption > Surface mount device (SMD) circuit board design > Low battery warning signal Product Data Working Principle Collection Type Smoke Sampling Period 10 s Sensor Type Photoelectric Alarm Alarm Type Smoke alarm, fault alarm, low battery warning Alarm

HY-SA21A-W2(868)

Wireless Smoke Alarm

> Split-spectrum sensor technology
> Test and silence features in one single button
> Loud sound output over 85 dB(A) at 3 meters
> Low quiescent current consumption
> Surface-mount device (SMD) circuit board design
> Low battery warning signal



Product Data

Working Principle

Collection Type

Smoke

Sampling Period

10 s

Sensor Type

Photoelectric

Alarm

Alarm Type

Smoke alarm, fault alarm, low battery warning

Alarm Volume

85dB–90dB(A) at 3 m (9.84 ft)

Alarm Mode

Visual and audible alarm

Silence Function

Yes

Silence Duration

About 12 min

Alarm Response Threshold

0.2 dB/m - 0.3 dB/m

Basic Parameters

Indicator Light

Red and green LED indicator

Led Instructions

Standby: Green indicator flashes once per minute
Alarm: Red indicator flashes once per second
Fault: Red indicator flashes once per minute

Low battery warning: Red indicator flashes once per minute

Coverage Area

When the height of the space is less than 8 m (3.28 ft), the protection area of a device is 20 m2–40 m2

Power Supply

Battery Life

3 year

Operating Voltage

3V CR123A lithium battery (replaceable)

Operating Current

Monitoring current: ≤ 35uA
Alarm current: ≤ 35mA

Operating Ambient

Operating Environment

Indoor

Operating Temperature

-10°C to +55°C (+14°F to +131°F)

Operating Humidity

≤ 95% RH (non condensing)

Appearance

Color

White

Casing

ABS

Dimensions

φ98mm × H43.1mm (φ3.85" × H1.70")

Weight

140 g (0.30 lb)

Installation

Ceiling Mount

Certifications

Certifications

TÜV and CE listed

Compliance Standard

EN 14604:2005+AC:2008

Wireless

Carrier Frequency

868 MHz–868.3 MHz

Communication Distance

Up to 1000 m (3280.84 ft) in an open space

Communication Mechanism

Two-way

Frequency Hopping

Yes

Encryption Mode

AES128

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 88075100913

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JollyPaisono
Pawtucket, US
★★★★★ 5
Winner winner Chicken 🐔 dinner..
Wow.. all I can say is for the money 💰 it's a WIN.. Never worry about losing or leaving it behind on a wknd getaway again.. Really sharp piece... Will buy a few different ones..
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Reviewed in the United States on June 7, 2025
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Sierra
Chelsea, US
★★★★★ 5
Wonderful!
Great watch! My husband loves this watch for when dressing up nice! Works great! Very fancy.
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Reviewed in the United States on February 8, 2025
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Stone Dog
Massapequa, US
★★★★★ 4
Unusual, unique look for cheap.
In most ways, this is simply an inexpensive Chinese quartz watch. As a watch collector, it's simply not the kind of thing I would be interested in. But, it is unusual in good ways. It's all stainless and the case is 39mm while the lug width is 20mm which is pretty normal for a dress watch. It's powered by a Japanese quartz movement giving three hands with day/date. As one can expect at this price, the crystal is mineral glass. The bracelet is a solid link type with a butterfly clasp. I really don't like butterfly clasps but that's just me, it works okay. It has 30m water resistance. Crown is push-pull. Pretty standard stuff. Then, the uniqueness drops on you! The crystal is faceted on the outside and the light really plays on it, especially with the sunray blue dial behind that! The dial is a combination of Roman numerals in gold on the even numbers and faux diamonds at the odd hour positions. It rides the edge of gaudy without going over IMO. The bezel has scallops which also reflect light as it moves. The case is all polish. The bracelet is just as unique. It is a little loose - jingly jangly as some pretty famous brands are. The bracelet is a combination of stainless and gold tone. The individual links are very well articulated and one row of the inner sections of the bracelet actually scalloped with a curve upwards at the ends - the opposite of what you'd expect but somehow it works and the unique touches all come together. I'm not saying this is a great watch for watch collectors. But, if you're looking for a cheap dress watch that won't look like anyone else's and still has decent specs this is worth a look!
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Reviewed in the United States on November 14, 2024
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Verified Purchase
James McPhie
Natrona Heights, US
★★★★★ 5
Great watch, looks good
I was worried about the watch looking too bulky and thick. It looks just right on my wrist and I have a 7 inch wrist. 10/10 watch, looks epic and was just what I wanted. Not too thick, not too thin, fits my needs perfectly.
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Reviewed in the United States on September 5, 2024
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PBK
Massapequa, US
★★★★★ 4
good watch, great price, mediocre band
Accurate? Great price? it's a Casio! Not the best looker, but darn easy to read. This is a stepping stone to an "easy reader" watch, with clear numbers on a high contrast background. Easy to set, this model is a good choice for traveling back and forth across time zones. The big drawback (and likely the reason I was able to buy this watch as a return) is the watchband, which has 3 faults. The hasp is old school and it can be hard to open and close except when it opens unexpectedly. The corners of the links are not rounded, so they can bite into your wrist. And adjusting the size of the band is a PITA. All in all, I'm on the lookout for a replacement band. [I have absurdly large wrists, but still needed to remove two links. Use a super small bladed screwdriver on the band and a paperclip for the springbar at the hasp. Open the band at the hasp, find and press down on bits of spring steel until you can slide them out of the watchband, remove links, reassemble the band. I'm reasonably handy but took 10+ minutes for the task.]
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 14, 2024

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