Defender CA6150 Carbon Monoxide Alarm with Digital Display
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Defender CA6150: A 10-Year CO Alarm That Shows You More
Most homeowners want a carbon monoxide alarm that is dependable, easy to maintain, and straightforward to understand. The Defender CA6150 Carbon Monoxide Alarm combines UL 2034-listed residential CO alarm protection with a digital display that lets you check detected carbon monoxide levels, including readings below the normal audible alarm thresholds.
Press the display button to check current CO concentrations starting at 10 parts per million (ppm), review the highest concentration recorded during the previous 30 days, and see how long that peak concentration was present. The CA6150 also includes factory-sealed lithium batteries designed for ten years of operation, eliminating routine battery changes.
Why Choose the Defender CA6150?
- UL 2034-listed residential protection: Tested and listed to the ANSI/UL 2034 standard for residential carbon monoxide alarms.
- Check CO levels from 10 ppm: Press a button to view detected CO concentrations, even when the audible alarm has not activated.
- Review previous exposure: Peak-level memory records the highest CO concentration detected during the previous 30 days and its duration.
- No routine battery replacement: Two factory-sealed, non-replaceable lithium batteries are designed to power the alarm for ten years.
- Secure installation: The mounting plate and retaining screw help prevent unintended removal.
- Ten-year limited factory warranty: Covers the alarm and its sealed batteries.
What Does the Digital CO Display Tell You?
The CA6150 offers more information than a basic alarm that only sounds when its alarm criteria are met.
- Current CO reading: Press the display button to check detected CO from 10 to 999 ppm.
- Automatic display: Current CO levels from 30 to 999 ppm appear automatically.
- Peak memory: Review the highest detected concentration from 10 to 999 ppm during the previous 30 days.
- Peak duration: Review how long CO remained near the recorded peak.
Important: A displayed CO reading is not the same as an audible alarm. The CA6150 follows residential UL 2034 alarm-response requirements, which consider both CO concentration and exposure time. It does not provide automatic audible warnings at 10 ppm.
How Quickly Will the CA6150 Sound an Alarm?
The alarm responds according to the concentration of CO and the length of exposure. Defender specifies the following response times at standard test concentrations:
| CO Concentration | Specified Alarm Response |
|---|---|
| 70 ppm | Within 60–240 minutes |
| 150 ppm | Within 10–50 minutes |
| 400 ppm | Within 4–15 minutes |
These are specified test points, not a guarantee that the alarm will remain silent at every lower concentration. Never assume that an environment is safe simply because an audible alarm has not sounded.
Is the CA6150 the Right CO Detector for You?
Choose the CA6150 when you need a residential carbon monoxide alarm with UL 2034 listing, sealed long-life batteries, and the ability to check CO readings and exposure history.
Consider the Defender LL6270 instead as an additional monitor when your main goal is automatic low-level CO detection. The LL6270 displays CO beginning at 5 ppm, provides a visual warning beginning at 9 ppm, and sounds an audible alarm beginning at 15 ppm, subject to the manufacturer's specified response times.
The LL6270 is a supplemental monitor and is not UL listed as a residential CO alarm. For both listed residential alarm protection and additional low-level monitoring, consider the Defender CA6150 + LL6270 combination kit.
CA6150, LL6270 or the Kit?
The CA6150 is the alarm your home needs. The LL6270 tells you about low CO a standard alarm is designed to ignore. The kit gives you both.
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YOU'RE VIEWING
 Defender CA6150CO Alarm
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 Defender LL6270Low-Level Monitor |
 Defender KitCA6150 + LL6270
BEST PROTECTION
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| What It Does | |||
| Main job | Required home CO alarm | Early warning at low CO levels | Both, in one order |
| UL 2034 listed home CO alarm | ✓ | — | ✓ |
| Shows CO on screen automatically | From 30 ppm | From 5 ppm | From 5 ppm |
| Check CO with a button press | From 10 ppm | Always on screen | Yes |
| Early warning light | — | From 9 ppm | From 9 ppm |
| Audible alarm | UL alarm levels (70 ppm within 1–4 hrs) | From 15 ppm | From 15 ppm |
| 85 dB alarm | ✓ | ✓ | ✓ |
| Peak CO memory and duration | 30 days | ✓ | ✓ |
| Power, Warranty and Shipping | |||
| Sealed lithium batteries, no battery changes | ✓ | ✓ | ✓ |
| Warranty | 10 years | 3 years | 10 + 3 years |
| Free shipping | Free | Free 2-day | Free 2-day |
| Best for | Meeting code: every level and outside sleeping areas | Knowing about low CO before a standard alarm would sound | Homes with a furnace, fireplace, water heater or gas range |
The LL6270 is a supplemental monitor. It is not UL listed as a residential CO alarm and does not replace the CO alarms your local code requires.
How Many Do You Need?
Short answer: at minimum, one CO alarm outside each sleeping area and one on every level of the home. Each of those locations needs its own CA6150.
Typical homes:
- Single-story home, bedrooms down one hallway: 1
- Single-story home, bedrooms at opposite ends: 2
- Two-story home, bedrooms upstairs: 2 (upstairs hallway plus main level)
- Two-story home with a finished basement: 3
Add one inside any bedroom where someone sleeps with the door closed.
What the Manufacturers, Codes and Health Guidelines Say
| Defender (manufacturer) | At least one outside each sleeping area and one on every level of the home. Add one inside any bedroom where someone sleeps with the door closed. For the most complete coverage, Defender recommends detection in all rooms and areas of the home. |
|---|---|
| CO Experts (manufacturer) | If you have only one, install it in an occupied bedroom or in the hallway within 10 feet of all bedrooms. Recommends at least one low-level monitor on each level of the home. |
| International Residential Code (IRC R315) | Required in homes with a fuel-burning appliance or an attached garage. Install outside each separate sleeping area, near the bedrooms, and inside any bedroom that contains a fuel-burning appliance. |
| NFPA 72 (formerly NFPA 720) | Outside each sleeping area near the bedrooms, and on every occupiable level of the home, including basements. |
| U.S. Consumer Product Safety Commission | On each level of the home and outside sleeping areas. |
| UL 2034 | A product standard, not a placement rule. It sets how long a listed alarm waits before sounding: 70 ppm within 1 to 4 hours, 150 ppm within 10 to 50 minutes, 400 ppm within 4 to 15 minutes. |
| World Health Organization | Does not address placement. Its indoor air guidelines set exposure limits of about 9 ppm averaged over 8 hours and about 3.5 ppm over 24 hours, well below the levels that make a standard alarm sound. |
Bottom line: Every source agrees on the core: near the bedrooms and on every level. State and local codes can add requirements, such as hardwired or interconnected alarms in new construction, so check yours before you install.
Placement tips (Defender): mount about 5 feet off the floor or at eye level. Keep it more than 5 feet from cooking and fuel-burning appliances, out of garages, and at least 3 feet from bathrooms and laundry rooms.
Defender CA6150 Technical Specifications
| Model | CA6150 |
|---|---|
| Product type | Residential carbon monoxide alarm |
| Safety listing | ANSI/UL 2034 listed |
| Sensor | Electrochemical CO sensor |
| Manual CO readout | 10–999 ppm |
| Automatic CO display | 30–999 ppm |
| CO sampling interval | Every 10 seconds |
| Audible alarm | 85 dB at 10 feet |
| Memory | 30-day peak CO level and peak duration |
| Power | Two sealed, non-replaceable lithium batteries |
| Service life | 10 years under normal conditions |
| Limited warranty | 10 years, alarm and batteries |
| Operating temperature | 40°F–100°F |
| Operating humidity | 10%–95% RH |
| Dimensions | 5.5 × 3.75 × 1.375 inches |
| Weight | 8 oz |
| Installation | Fixed mount; single-station alarm |
| Manufactured in | Canada |
Frequently Asked Questions
Is the Defender CA6150 UL listed?
Yes. The CA6150 is listed to ANSI/UL 2034 for residential carbon monoxide alarms. Whether it satisfies a particular installation's building-code requirements depends on local rules, including any requirements for hardwired or interconnected alarms.
Will the CA6150 alert me automatically at 10 ppm?
No. You can check detected CO levels starting at 10 ppm by pressing the display button. Audible alarm activation follows the manufacturer's specified concentration-and-time response requirements.
Does the CA6150 require replacement batteries?
No. Its lithium batteries are factory-sealed and non-replaceable. The alarm is designed for a ten-year operating life under normal conditions.
Can I use the CA6150 in an RV or vehicle?
No. Defender does not design the CA6150 for vehicles or unconditioned spaces. Choose an alarm specifically approved for the intended environment.
Does the CA6150 detect smoke or natural gas?
No. The CA6150 detects carbon monoxide. It is not a smoke alarm or combustible-gas detector.
Is the CA6150 connected to other alarms?
No. It is an independent, single-station CO alarm. It does not provide wired or wireless interconnection.
Where should the CA6150 be installed?
Follow Defender's owner's manual and applicable local requirements. Residential CO alarms are generally installed outside sleeping areas and on each level of the home. Avoid prohibited locations, including areas outside the specified operating conditions.
Safety note: If a carbon monoxide alarm activates, follow its instructions immediately. Do not use a low displayed reading or a silent alarm as proof that an environment is safe.