Kidde Ultra-Sensitive Carbon Monoxide Detector
for Pets, Health, or Medical Conditions, Battery Powered with Digital Display, UNIT
Price as of 2026-06-02. Check Amazon for the current price.
Quick Decision
Price Intelligence
- Budget:$24–$39
- Mid-range:$39–$78← You are here
- Premium:$78+
Is This Right For You?
- •Buyers who prioritize quality over price in Carbon Monoxide Detectors
- •Kidde loyalists — the brand spans 155 products in our database
- •You're on a tight budget — $14 above the category average of $64
- •Rating sits in the bottom 17% of Carbon Monoxide Detectors — higher-rated options exist
- •Kidde Carbon Monoxide Detector offers a better rating (4.7/5) at a similar or lower price ($36)
- •Kidde Carbon Monoxide Detector — 59% cheaper at $32 (Score A-)
- •Kidde Carbon Monoxide Detector — higher rated at 4.7/5 ($36)
📊 Based on data analysis of 53 products in this category.
Mubboo Score: C+
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other Carbon Monoxide Detectors
Computed from live Amazon rating, review count, and price across 53 Carbon Monoxide Detectors available to US consumers · last refreshed 2026-06-02.
How It Compares
This Product Kidde Ultra-Sensitive Carbon Monoxide Detector | Most Popular Kidde Carbon Monoxide Detector | Best Rated First Alert Carbon Monoxide Detector | Best Value Kidde Carbon Monoxide Detector | |
|---|---|---|---|---|
| Price | $77.98 | $36 | $34.98 | $31.97 |
| Rating | 4.3/5 | 4.7/5 | 4.6/5 | 4.8/5 |
| Reviews | 157 | 35,752 | 22,922 | 973 |
| Mubboo Score | C+ | A+ | A | A- |
Quick Specs
- Alarm
- Audible
- Color
- White
- Style
- Digital
- Unit Count
- 1.0 Count
- Item Weight
- 8 ounces
- Sensor Type
- Electrochemical
- Manufacturer
- Kidde
- Model Number
- 21009942
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Choose a model with a digital display if you want to see real-time CO levels. Note that the low-battery chirp can be mistaken for a smoke detector, so test early; also remember these need replacement after 10 years.
- Plug-and-Play Installation
- Peace of Mind & Reliable Protection
- Battery Backup for Outages
- Loud Alarm for Safety
- Portable for Travel
- No Digital Display on Basic Units
- Low-Battery Chirp Resembles Smoke Detector
Expert Picks in Carbon Monoxide Detectors
- Kidde Smart Smoke + Carbon Monoxide Alarm — Best smart smoke alarm
- First Alert SC5 Hardwire Smart Smoke and CO Alarm — Works with Nest Protect units
- Kidde Ring Smart Smoke + Carbon Monoxide Alarm — Ring alarm users
Category recommendations from independent expert publications. Source links in References.
Related Video Reviews
- 📹 What Most Homeowners Don’t Know About Carbon Monoxide Detectors — The DIY HVAC Guy
- 📹 Best Carbon Monoxide Detectors in 2026 — wiredtech
- 📹 7 Best Carbon Monoxide Detector 2026! Tested & Tried — Everything Under Control
Key Features
- ✦Electrochemical sensor will detect low levels of CO (below 30 PPM) for family members or pets, specifically those who have medical conditions
- ✦CO alarm will sound at 85 decibels if carbon monoxide is present - easy installation includes a wall mount or table top placement
- ✦Protects during a power failure - operates on 3-AA batteries, included with pack
- ✦Digital display features an advanced level of monitoring showing CO levels as low as 10 PPM
- ✦10 Year end of life warning alerts user to replace CO monitor after 10 years of operation
Source: product listing on Amazon.
About Kidde
- 155 products in our database
- Average rating: 4.6/5 across all products
- Price range: $12.87 – $381.75
- Categories: Carbon Monoxide Detectors, Fire Extinguishers, Smoke Detectors
If not the Ultra-Sensitive Carbon Monoxide Detector, consider these
Bottom Line
Kidde Ultra-Sensitive Carbon Monoxide Detector earns Mubboo Score C+. Priced at $78 — a premium option, above the category average of $64. Rated 4.3/5 from 157+ reviews. Strong buy if: buyers who prioritize quality over price in carbon monoxide detectors, kidde loyalists. Skip if: you're on a tight budget — Kidde Carbon Monoxide Detector (Score A+, $36) may fit better.
Frequently Asked Questions
Is the Kidde Ultra-Sensitive Carbon Monoxide Detector worth buying in 2026?
It earns a Mubboo Score of C+, with a 4.3/5 rating from 157 reviews — better than 17% of Carbon Monoxide Detectors we track.
How much does the Kidde Ultra-Sensitive Carbon Monoxide Detector cost?
It is currently $77.98 — premium-tier pricing for Carbon Monoxide Detectors.
How does the Ultra-Sensitive Carbon Monoxide Detector compare to other Carbon Monoxide Detectors?
The category's most-reviewed alternative is the Kidde Carbon Monoxide Detector (4.7/5, 35,752 reviews, $36). The Ultra-Sensitive Carbon Monoxide Detector carries a Mubboo Score of C+ vs A+.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-02) and may change.