Photoelectric Sensor - Smoke/Fire Alarm - 120V with Battery Backup

1 Review
SKU: P12040
Brand: Kidde
Mfr Part Number: 21006371

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The Kidde P12040 is a 120VAC powered photoelectric smoke alarm with 9V battery back up. This advanced smoke alarm has the ability to function as a stand-alone unit or in an interconnected system. The Kidde P12040 includes a test button, quick-connect power harness and offers a 10-year limited warranty. This alarm uses photoelectric sensing technology. Photoelectric sensing alarms may detect visible particles (associated with smoldering fires) sooner than ionization alarms. Ionization sensing alarms may detect invisible fire particles (associated with flaming fires) sooner that photoelectric alarms.

  • Photoelectric Sensor – Advanced photoelectric sensor may detect visible particles (associated with smoldering fires) sooner than ionization alarms
  • Battery Backup (9V Battery Included) – Provides continuous protection even during power outages
  • Test Button – Tests unit’s electronic circuitry, horn and battery function
  • Quick Connect Power Harness – Makes installation fast and easy
  • Dust Cover – Protects sensor during construction
  • Battery Pull Tab – Eliminates battery installation time and keeps battery fresh
  • Red LED – Indicates that the smoke alarm is operating properly, Hush, and alarm condition
  • Green LED – Indicates the presence of AC power

Brochures & Spec Sheets

Spec SheetKidde 21006371 SpecsDocumentationKidde P12040 Installation

Electrical & Operational Information

Operating Temperature40°F - 100°FWiring TypeLine Voltage, Battery


Alarm TypeSmoke/FireColor FinishWhite
Housing MaterialThermoplasticHumidity Range5% - 95%
Sensor TechnologyPhotoelectricSound Level (db)85

Included Components

Emergency Battery Includedyes

Warranty & Certifications

CertificationsNFPAProduct Warranty10 Years
UL Listedyes

Dimensions & Measurements

Product Length (in.)1.5Product Width (in.)5.6
Product Height (in.)5.6

Ratings & Reviews

1 review

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7/13/2016 12:00:00 pm


by Cheryl A -

Order was shipped very quickly. Great price for smoke alarms!