SKU: 26359845800

DAHUA HY-GC20B Standalone Carbon Monoxide Alarm

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Description

DAHUA HY-GC20B Standalone Carbon Monoxide AlarmHY GC20B Standalone Carbon Monoxide Alarm > High performance Figaro electrochemical CO sensor to deliver accurate detection of carbon monoxide leakage and respond quickly > Long standby time, low power consumption, 10 year battery life > Support low battery warning, one click silence, and self test > Informative and easy to read CO concentration display in screen > Three indicator lights for displaying device status clearly > Excellent production,

HY-GC20B

Standalone Carbon Monoxide Alarm

> High-performance Figaro electrochemical CO sensor to deliver accurate detection of carbon monoxide leakage and respond quickly
> Long standby time, low power consumption, 10-year battery life
> Support low battery warning, one-click silence, and self-test
> Informative and easy-to-read CO concentration display in screen
> Three indicator lights for displaying device status clearly
> Excellent production, novel appearance, delicate and compact, simple and convenient installation



Product Data

Working Principle

Collection Type

Carbon Monoxide (CO)

Sensor Type

Electrochemical

Alarm

Alarm Type

CO alarm, fault alarm, low battery warning

Alarm Volume

Over 85dB (A) at 3 m (9.84 ft)

Alarm Mode

Visual and audible alarm

Silence Function

Support

Silence Duration

About 45 seconds

Alarm Response Threshold

50 ppm: 60 min–90 min

100 ppm: 10 min–40 min

300 ppm: < 3 min

Basic Parameters

Display

LCD

Indicator Light

LED (red/yellow/green)

LED Instruction

Alarm: Red indicator
Fault: Yellow indicator
Power: Green indicator

Power Supply

Battery Life

10 years

Power Source

3V CR123A lithium battery (replaceable)

Operating Current

Monitoring Current: ≤20uA
Alarm Current: ≤10mA

Operating Ambient

Operating Environment

Indoor use only

Operating Temperature

–10°C to +40°C (+14°F to +104°F)

Operating Humidity

≤95% RH (non condensing)

Appearance

Color

White

Material

PC + ABS

Dimensions

116.4 mm × 71.7 mm × 28.3 mm (4.58" × 2.82" × 1.11")

Weight

125 g

Installation

Wall Mount

Certification

Certifications

TÜV and CE listed

Compliance Standard

EN 50291-1:2018

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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: 26359845800

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4.7 ★★★★★
Based on 379 reviews
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Product Reviews
J
Verified Purchase
Jessica Horn
Waukegan, US
★★★★★ 5
It’s a YES from me!
Color: B-brown
I absolutely love this purse. And I’m so heartbroken because something got spilled inside of it and it affects the functionality of the person on the inside and it makes me so sad but I still use it anyway because there’s one side I can use completely and half a side I can use on the other side lol. It is very good quality. The storage is A+. It is definitely a good value for the price. I was skeptical at first as we all are ordering a purse off Amazon, that is not real leather, but it’s supposed to be good quality. It didn’t really have much of a smell. I actually don’t use the strap provided since I seen that the straps could be interchangeable, I used my strap off my previous purse instead, and now I love it love it! 😍 I get compliments on it all the time!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025
M
Mandee~
Birmingham, US
★★★★★ 5
Perfect size!
I love a good large hobo bag! This one has a great slouch to it and you can fit a ton in it! I've had everything from my iPad and a makeup bag plus yoga clothes and still had room for a water bottle too! The fabric is gorgeous and although I'm not always keen on logo-prints, I like that the bag's print is so understated and discreet.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
K
Kelly from TX
Cuba, US
★★★★★ 5
Large, non zipping, sturdy, stylish
large cream MK purse I’m giving my thoughts on this purse that I got recently and here is what I liked. Size- This is a large purse. It has one large main compartment that is secured with a gold, snapping clasp. It doesn’t come apart unless you push both sides of this clasp. 1 pocket inside for my phone or whatever I need quick access to. 2 vertical outside pockets with working zipper. The pockets run the height of the purse and are narrow. I can get a skinny water bottle in there. Not Adjustable This comes with a short shoulder strap. The strap is not removable. There are two D-rings (H-ring) on each side that hold the strap so if I want I can add a long strap. Really though, this is not the kind of purse that would look good with a long strap. There is plenty of room to put the purse on your shoulder and it feels very secure. Look and feel It looks and feels like leather to me but it says PU which is not leather. I’m fine with that. It is firm in a sturdy strong way, having structure and can stand up on a table. The material is the kind you can wipe with a damp cloth. This purse is not going to get stained unless it’s something like ink that stains practically everything. Mine has monogram NK but if you don’t look real close, I think it looks a lot like a designer purse with the monogram m and k. Function I tend to change purses a lot so I keep things in smaller bags. For example, I have small bags for makeup, medical etc and they fit neatly in here. There is not a designated place for cards and cash so you’d need a wallet or you could put it in the inside pocket. I use a medium sized wallet. My iPhone 14 with case fits in the inside pocket and hasn’t fallen out yet. The 2 outside zipper pockets are large enough to hold my phone and my wallet, one on each side. I can’t think of anything I’d add or change right now. This is a very nice bag to carry everyday. The holding capacity is similar to the neverfull. I’m happy I got this and can recommend it to you. It’s nice looking, makes good use of space, and for me, was a good deal.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
M
Verified Purchase
mary
Louisville, US
★★★★★ 1
👎🏻
Color: Beige
0 stars Poor quality Arrived torn
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
T
tiffanyking75
Omaha, US
★★★★★ 2
Quality is not there, I am very disappointed!
Color: Pink, Color: Pink
I am one of those very rare ladies that will wait until her previous purse is on its last leg before I buy a new one. That is when I decided I needed this one. Once I opened the package I noticed a very distinct odor, it was very obviously the purse and it was not a "new" smell it was very off-putting. The purse does not seem very durable as I noticed loose threads throughout the lining of the purse. I was also a little disappointed that this purse is so large but it only had one very large square pocket on the inside. The only reason I gave this more than one star is because of the two very nice pockets on the purse front. I appreciate what they were trying to do, I do not think they were quite up to par on the quality, I would not recommend this item.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026

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