Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
Heads up, this deal has expired. Want to create a deal alert for this item?
  1. Deal Image
Item 1 of 4
  1. Deal Image
  2. Deal Image
  3. Deal Image
  4. Deal Image
Item 1 of 4
expiredphoinix | Staff posted Apr 11, 2026 5:00 AM

$19.99 | 3-in-1 Carbon Monoxide w/Temp & Humidity Detector at Woot!

$20

$90

77% off
Woot!
15 Comments
4.5K Views
Visit Woot!
Deal Details
Woot! [woot.com] has 3-in-1 Carbon Monoxide w/Temp & Humidity Detector for $19.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.

Price:
$70 lower (78% savings) than the pointless price of $89.99

Please report the deal if expired
My other deals
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Woot! [woot.com] has 3-in-1 Carbon Monoxide w/Temp & Humidity Detector for $19.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.

Price:
$70 lower (78% savings) than the pointless price of $89.99

Please report the deal if expired
My other deals

Community Voting

Deal Score
+4
Good Deal
Visit Woot!

Join The Conversation

Share information with the community. Please follow our Community Guidelines and be kind!

15 Comments

Sign up for a Slickdeals account to remove this ad.

Expert
This user is an Expert in Tech & Electronics
Apr 11, 2026 7:51 AM
20,176 Posts
Joined Sep 2011
bluekiwi
Expert
This user is an Expert in Tech & Electronics
Apr 11, 2026 7:51 AM
20,176 Posts
Appears to be this brand
$46.34 for a 2 pack, canadian,

https://www.amazon.ca/Monoxide-De...B0FC1J8MK3
2
Apr 11, 2026 11:31 AM
154 Posts
Joined Nov 2020
ErnestoSimonApr 11, 2026 11:31 AM
154 Posts
Thank you. Got 3 units to replace my very old ones. Nice to have temp and humidity as well.
Apr 11, 2026 4:33 PM
93 Posts
Joined Apr 2017
LemonarApr 11, 2026 4:33 PM
93 Posts
Quote from bluekiwi :
Appears to be this brand
$46.34 for a 2 pack, canadian,

https://www.amazon.ca/Monoxide-De...B0FC1J8MK3
Or this: https://www.amazon.com/Monoxide-D...=8-37&th=1
Apr 11, 2026 4:34 PM
93 Posts
Joined Apr 2017
LemonarApr 11, 2026 4:34 PM
93 Posts
3 for $33 on Amazon - https://www.amazon.com/Monoxide-D...=8-37&th=1
1
Expert
This user is an Expert in Tech & Electronics
Apr 11, 2026 6:04 PM
20,176 Posts
Joined Sep 2011
bluekiwi
Expert
This user is an Expert in Tech & Electronics
Apr 11, 2026 6:04 PM
20,176 Posts
Quote from Lemonar :
3 for $33 on Amazon - https://www.amazon.com/Monoxide-D...=8-37&th=1
3 for $33 is a better price vs 3 for $60 from this deal
Apr 11, 2026 6:40 PM
10,153 Posts
Joined Sep 2007
Santa_ClausApr 11, 2026 6:40 PM
10,153 Posts
Quote from ErnestoSimon :
Thank you. Got 3 units to replace my very old ones. Nice to have temp and humidity as well.
dude, cheaper at amazon for 3 see the replies.
Apr 11, 2026 6:41 PM
10,153 Posts
Joined Sep 2007
Santa_ClausApr 11, 2026 6:41 PM
10,153 Posts
2 reviews?

Sign up for a Slickdeals account to remove this ad.

Apr 11, 2026 6:51 PM
12,010 Posts
Joined Sep 2007
RugerRedhawkApr 11, 2026 6:51 PM
12,010 Posts
sketchy
Apr 11, 2026 7:13 PM
708 Posts
Joined Apr 2014
Henchman_21Apr 11, 2026 7:13 PM
708 Posts
I got this item from a previous Woot sale and it's not bad for the price. It's nice to have three meters.
Apr 11, 2026 7:14 PM
4,340 Posts
Joined Sep 2005
cjfrugalApr 11, 2026 7:14 PM
4,340 Posts
Quote from bluekiwi :
3 for $33 is a better price vs 3 for $60 from this deal
Currently unavailable
Apr 11, 2026 10:00 PM
346 Posts
Joined Aug 2020
WiseRose8215Apr 11, 2026 10:00 PM
346 Posts
Has anyone used it with HA?
Apr 12, 2026 5:41 PM
1,973 Posts
Joined Apr 2017
ekguruApr 12, 2026 5:41 PM
1,973 Posts
Reviewed in the United States on March 27, 2026
Item Package Quantity: 3
It doesn't alert until it hits 150ppms of co or higher and that point there would Harley be severely side effects. 30ppms in the ambient air is above the safety threshold.
Pro
Apr 13, 2026 4:10 AM
3,309 Posts
Joined Mar 2007
hkteaman
Pro
Apr 13, 2026 4:10 AM
3,309 Posts
Quote from Lemonar :
3 for $33 on Amazon - https://www.amazon.com/Monoxide-D...=8-37&th=1
Thanks for posting. Looks the same as Woot's deal, only 2 reviews but worth a try at $34 and 30 days return.
Pro
Apr 13, 2026 4:17 AM
1,005 Posts
Joined Jan 2007
Orange_Elvis
Pro
Apr 13, 2026 4:17 AM
1,005 Posts
I like my carbon monoxide at about 40% relative humidity.

Sign up for a Slickdeals account to remove this ad.

Pro
Apr 14, 2026 1:00 PM
3,309 Posts
Joined Mar 2007
hkteaman
Pro
Apr 14, 2026 1:00 PM
3,309 Posts
Quote from hkteaman :
Thanks for posting. Looks the same as Woot's deal, only 2 reviews but worth a try at $34 and 30 days return.
I received my order yesterday. The design looks good but the material feels cheap. The temperature reading was 3-5 degrees higher than my Govee thermometer and the CO reading is the same as my Kidde CO detector reading 0 ppm. I don't have a humidity device to compare the reading with. Basement reading is 10% higher than the first floor reading.
The display is well lit so it's easy read. I hope the CO reading stays accurate and I will keep an eye out and compare with the Kidde unit before moving it to another location. Overall, not bad for $11 each.
Last edited by hkteaman April 14, 2026 at 06:17 AM.

Join The Conversation

Share information with the community. Please follow our Community Guidelines and be kind!

Related Searches

Home & Home ImprovementHome Security & SafetyBuilding & Remodeling SuppliesWoot!

Popular Deals

See All
Found by phoinix
Yesterday 8:25 PM
Forum Thread
$10* | Hanes Moves Women's Pull-On Racerback Crop Sports Bra at Amazon$10$24
58% off
0
Found by phoinix
Today 4:42 AM
Forum Thread
$24.92* | The Hobbit & The Lord Of The Rings: Deluxe Pocket Boxed Set at Amazon$25$75
66% off
0
Found by phoinix
Jul 12, 2026 5:13 PM
Forum Thread
$6.21* | Cold Steel Rubber Rondel Trainer at Amazon$6.21$12
48% off
3
Found by SUCHaDEAL
Today 1:09 AM
Forum Thread
Select Walmart Stores: 24-Pk 12-Oz Coca-Cola (Original, Zero Sugar or Diet) $10$9.99$15
33% off
5
Found by hawkblu09
Yesterday 7:00 PM
Forum Thread
4-Pack 1" x 15' DJDAJIA Tie Down Ratchet Straps w/ Soft Loops & Coated S-Hooks (Black) $19.99, More + Free Shipping w/ Prime or on $35+$20$40
50% off
0

Trending Deals

See All
Found by jimmyk262
Today 1:43 AM
Forum Thread
ZWILLING Four Star 6.5-inch Bunka Knife $59.95$60$140
57% off
6
Found by phoinix
Today 4:40 AM
Forum Thread
[AC] $143.99* | Apple Magic Keyboard w/ Touch ID & Numeric Keypad at Amazon$144$179
19% off
0
Found by babgaly
Today 2:05 AM
Forum Thread
Pudolla Men's Sun Protection Long Sleeve Fishing Swim Shirts w/ UPF 50 (Various) $13.91 + Free Shipping w/ Prime or on $35+$14$24
41% off
2
Found by Bojjihuntindeals
Yesterday 8:33 PM
Forum Thread
Lacoste Home Heritage Anti-Microbial Supima Cotton Washcloth (13" x 13", Sand) $6 + Free Shipping w/ Prime or on $35+$6.00$16
62% off
6
Found by ItsSoCheap
Today 4:03 AM
Forum Thread
Sunpak Tri-Monopod w/ 3-Way Pan-and-Tilt Head $15.95 + Free Shipping on $49+$16$40
60% off
2