CPSC recall 15-077, announced February 11, 2015, covers i4 Series System Sensor combination carbon monoxide (CO)/smoke detectors (about 1,450 units). The detectors can fail to detect carbon monoxide gas in the home, posing a risk of carbon monoxide poisoning. The notice reports no incidents. Consumers should immediately contact System Sensor to obtain a free replacement combination CO/smoke detector. Recall contact: call (800) 736-7672, or go to www.systemsensor.com.
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Compare the model on your label, then check any serial numbers, date codes, and exclusions in the notice. A model match alone does not confirm that your unit is included.
Recalled units have date codes 4091 or 4092 printed on the lower left-hand corner of the label affixed to the back of the product and on the packaging.
Which products are included?
This recall involves System Sensor i4 series combination carbon monoxide/smoke detector models COSMO-2W and COSMO-4W manufactured between 9/3/14 and 9/13/14. The detectors are round, white, and measure about 5.5 inches in diameter. Recalled units have date codes 4091 or 4092 printed on the lower left-hand corner of the label affixed to the back of the product and on the packaging.
Confirm these details on the official CPSC noticeWhat to look for
- Model numbers
- 2 listed, all starting with
COSMO-. Yours must match one exactly. - Also in the notice
- Date codes. Compare these as well.
- Where to look
the lower left-hand corner of the label affixed to the back of the product
(the notice’s words)- When sold
- September 2014
- Price paid
- $75
Why it was recalled
The detectors can fail to detect carbon monoxide gas in the home, posing a risk of carbon monoxide poisoning.
Incidents and injuries
None reported.
Official remedy
Consumers should immediately contact System Sensor to obtain a free replacement combination CO/smoke detector. Consumers should keep using the recalled detectors until replacement detectors are installed.
What to do now
- Check the label. Compare your model number with the 2 listed in this recall, then check the date codes the notice lists.
- Contact the firm. Call (800) 736-7672, or go to www.systemsensor.com.
- Get the remedy. This recall offers a replacement. The notice says the remedy is free.
- Read the official notice. The CPSC notice is the final word on which units are included and what to do.
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Product and sales details
- Brand
- System Sensor
- Manufacturer
- System Sensor, of St. Charles, Ill.
- Product type
- Smoke alarms
- Recall number
- 15-077
- Units
- About 1,450
- Manufactured in
- Mexico
- Sold at / sales period
- Security equipment dealers nationwide during September 2014 for about $75.
i4 Series System Sensor combination carbon monoxide (CO)/smoke detectors
CPSC product type: Fire or Smoke Alarms
This recall in context
Compared with the 36 smoke alarm recalls in this index, as of October 31, 2026.
- Size
- 1,450 units: the 22nd-largest of 28 smoke alarm recalls that state a unit count. The median is 28,500 units.
- Hazards
- Carbon monoxide: named in 4 of 36 smoke alarm recalls. Poisoning: named in 2 of 36 smoke alarm recalls.
- Remedy
- Replacement: offered in 12 of 36 smoke alarm recalls, the most common remedy.
- Time on sale
- 1 month. Recalled 5 months after the last month of sales the notice gives.
Recall contact information
System Sensor at (800) 736-7672 from 8 a.m. to 5 p.m. CT Monday through Friday or online at www.systemsensor.com, and click on "Product Safety Notice" for more information.
Verify phone numbers, hours, and websites on the current CPSC notice before contacting the firm.
Know someone who has one?
Recalls only work when owners hear about them. Send this notice to family or friends who might own the same product.
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