Model # SA520B

Internet #203658773

First Alert 120-Volt AC Wireless Smoke Detector with Photo-Electric Sensor

First Alert

120-Volt AC Wireless Smoke Detector with Photo-Electric Sensor

  • Wireless connection so when one alarm sounds, all alarms sound
  • Photoelectric smoke sensing technology
  • Hardwired with battery backup
$41.26 /each

Frequently Bought Together

Product Overview

The Wireless Smoke Alarm detects smoldering fires and has a spread spectrum horn tone. This alarm will sound if it detects smoke even during power outages. It uses a secure radio frequency with 65,000 security codes to communicate between alarms, which are perfect for linking alarms on different floors or in stairwells. No wires necessary and it's programmable with multiple alarms for a home safety system. Other features include a test and silence button, a latching indicator that remembers which unit initiated the alarm and smart technology that helps reduce false alarms. The SA520B can be connected to other smoke alarms and offers 360˚ access to the smoke sensor. If one unit triggers an alarm, all smoke alarms in the series will sound. The SA520B features a perfect mount system for perfect alignment, a low battery latch and (2) silence features. You can silence the low-battery chirp for eight hours or temporarily silence a nuisance alarm. The Wireless Smoke Alarm is warranted to the original purchaser for a period of 10 years. First Alert invests time and research into providing dependable and hardworking products. Committed to innovation and value, First Alert improves safety in and around the house.

  • Audible alarm emits low frequency sounds
  • Interconnects with other alarms without wires
  • 1-button silence and test
  • Alarm remember which device started the series
  • Onelink alarms by First Alert feature a wireless connection so when one alarm is triggered, all alarms sound
  • Photoelectric smoke sensing technology reduces nuisance alarms
  • Easily expand an existing interconnected 120-Volt AC system by replacing one alarm with the SA520B
  • Comes with a 10 year limited warranty
  • Click here for more information on Electronic Recycling Programs

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.

Compare Similar

$41.26 /each
$49.97 /each
$60.06 /each
$88.97 /each
Name 120-Volt AC Wireless Smoke Detector with Photo-Electric Sensor 10-Year Lithium Ion Battery Operated Smoke Alarm (3-Pack) 120-Volt Hardwire Ionization Sensor Smoke Alarm with Battery Backup (6-Pack) Hardwired Interconnected Photoelectric Smoke Alarm, Ceiling Mount, ADA Strobe with Battery Backup
Brand First Alert Code One BRK Gentex
Ratings (1) (193) (30) (8)
Alarm Sensor Type Photoelectric Ionization Ionization Photoelectric
Alarm/Detector Features Battery Back-Up 10-Year Battery,Hush Feature,No Additional Features,Tamper Resistant,Value Pack Battery Back-Up Battery Back-Up,Interconnected,Strobe Light,Tamper Resistant
Power Source Battery Battery Hardwired Hardwired
Commercial / Residential Residential Residential Commercial / Residential Commercial / Residential
Alarm Type Smoke Smoke Smoke Smoke
View Product View Product View Product View Product




Warranty / Certifications

More Products With These Features


Customer Questions & Answers

does this mean it has a camera in it?

Asked by: dee
Photoelectric smoke detectors contain a light source in a light-sensitive electric sensor, which are positioned at 90-degree angles to one another. Normally, light from the light source shoots straight across and misses the sensor. When smoke enters the chamber, it scatters the light, which then hits the sensor and triggers the alarm.
Answered by: Coobs
Date published: 2016-11-20

compatibility with firex

is the Model # SA520B bridging solution compatible with a hard-wired circuit of firex smoke detectors?
Asked by: kevinm

Does the photo-electric sensor make this smoke detector less likely to go off due to steam from my shower?

Asked by: brentg
  • y_2017, m_4, d_21, h_20CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_3
  • loc_, sid_203658773, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 106ms

Customer Reviews

120-Volt AC Wireless Smoke Detector with Photo-Electric Sensor is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Performs as advertised We installed a combination of fifteen interconnected hard-wire and wireless smokes along with three interconnected wireless CO detectors. All eighteen linked together just as advertised and worked flawlessly. Here's to hoping we never need them but if we do, then we can sleep comfortably knowing we're well protected.
Date published: 2013-10-15
  • y_2017, m_4, d_22, h_1
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_1
  • loc_, sid_203658773, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 18ms