Carbon Monoxide Detector - Electrochemical Sensor - Plug-In with 9V Battery

3 Reviews
Brand: Kidde
Mfr Part Number: 21006973

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The Kidde KN-COPP-3 AC powered, plug-in carbon monoxide alarm utilizes sophisticated electronic components and unmatched sensor technology to protect you and your family from the dangers of CO. The KN-COPP-3 includes a 9V battery backup that provides continuous monitoring of CO levels, even during power outages, when AC-only units are not providing protection. The KN-COPP-3 will detect and store measured data of concentrated CO levels as low as 11 and up to 999 PPM with its peak level memory display. This alarm gives you several mounting options, including: direct-plug, a 6' power cord or table top.

  • Digital Display – Displays the level of carbon monoxide the unit is sensing. The unit updates this reading every 15 seconds
  • Peak Level Button – Displays the peak CO level recorded by the alarm since it was last reset or unplugged
  • 9V Battery Backup –Provides protection during power outage
  • Test Button Functions –– Tests the unit for proper operation – Resets the Carbon Monoxide alarm
  • LED Operation – Blinking dot in lower right corner of display denotes normal operation – Digital readout displays CO concentration in parts per million (30-900PPM)
  • In alarm condition you will hear 4 quick beeps, 5 seconds off, repeat

Brochures & Spec Sheets

Spec SheetKidde 21006973 SpecsDocumentationKidde KN-COPP-3 Installation

Electrical & Operational Information

Operating Temperature40?F - 100?FWiring TypeBattery, Plug In


Alarm TypeCarbon MonoxideColor FinishWhite
Housing MaterialThermoplasticHumidity Range5% - 95%
Sensor TechnologyElectrochemicalSound Level (db)85

Included Components

Emergency Battery Includedyes

Warranty & Certifications

CertificationsNFPAProduct Warranty10 Years
UL Listedyes

Dimensions & Measurements

Product Length (in.)1.75Product Width (in.)3.75
Product Height (in.)6.1

Ratings & Reviews

3 reviews

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12/29/2016 12:00:00 pm

one of the Kiddie 9V

by Virgil A -

one of the Kiddie 9V battery's was completely dead

3/11/2018 12:00:00 pm

Good. Price just what we

by Delton K. -

Good. Price just what we need

3/9/2019 12:00:00 pm


by James G. -

The service and product was awesome. Easy to work with costumer service.