Free shipping orders $250+.

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Same day shipping.

Applies to orders placed Monday to Friday before 1:00 pm CST.

Up 24 months warranty.

24 months for NEW and 12 months for RECONDITIONED.

Free 30 days returns.

We will provide a free return label. No restocking fees.

Notifier FSP-851 Intelligent Photoelectric Smoke Detector

Out of stock
SKU: FSP-851 UPC: 783763021091

BULK ORDER Quote.

How Bulk Order Discounts Work

We partner with Cart Whisper to make bulk ordering fast and simple. You can build your cart normally, then submit the entire cart to our team so we can apply bulk pricing and send you a custom quote.

1) Add everything you need to your cart

Shop the site and add all the products and quantities you want — just like a normal order.

2) Open your cart drawer and submit your cart

When you open the cart drawer, you’ll see a Cart Whisper section that looks like this:

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Submit Cart to Support

Click “Submit Cart to Support” to send your cart to our team.

3) Fill out the quick form

After clicking the submit button, a form will pop up. Please enter:

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  • Email

  • Short message (what you want / any special notes)

Important: Include your shipping address in the message.
That helps us quote your order accurately, including shipping and taxes (if applicable).

4) We review and send your custom quote

Once we receive your cart submission, we’ll:

  • Review your cart items and quantities

  • Apply any eligible bulk discounts

  • Send you a custom quote with final pricing (and shipping/tax if applicable)


What to include in your message (recommended)

To speed things up, copy/paste this format into the message box:

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  • Notes / Special requests:

SELECT ITEM CONDITION
Regular price $59.00 USD
Regular price Sale $80.00 USD Sale price $59.00 USD
Payment methods
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Notifier FSP-851: Intelligent plug-in photoelectric smoke detector with analog communications, rotary addressing, dual LED indicators, and comprehensive certifications.

Product Specifications

  • Manufacturer: Honeywell
  • Brand: Notifier
  • Model Number: FSP-851
  • UPC:783763021091
  • Product Type: Intelligent Photoelectric Smoke Detector
  • Product Series: 851 Series
  • Detection Method: Photoelectric smoke detection
  • Communication: Analog communications with point ID capability
  • Voltage Range: 15-32 volts DC peak
  • Standby Current: 300μA @ 24V DC (one communication every five seconds with LED enabled)
  • LED Current (max): 6.5mA @ 24V DC ('ON')
  • Features: Low standby current, rotary address switches, dual LEDs for 360° visibility
  • Programming: Detector sensitivity can be programmed and monitored through control panel software
  • Certifications: UL Listed (S1115), MEA Listed (225-02-E), FM Approved, CSFM (7272-0028:0206)
  • Application: Commercial fire alarm systems

New Condition

  • Products in new condition are unused and in their original state.
  • Backed by our 24-month warranty, ensuring reliability and peace of mind.

Reconditioned Condition

  • Products in reconditioned condition are previously owned but have been professionally tested and inspected to ensure full functionality.
  • May include minor repairs, such as replacing damaged screws, but are not fully refurbished.
  • Covered by our 12-month warranty, guaranteeing performance.

Free Shipping on Orders Over $250

Enjoy free standard shipping on all orders over $250!

  • Applies to the contiguous United States
  • Excludes Alaska, Hawaii, U.S. territories, and oversized items
  • No promo code needed—free shipping is automatically applied at checkout when your order total is $250 or more.

For full details, please refer to our Shipping Policy.

30-Day Hassle-Free Returns

Your satisfaction is our priority!

  • Free returns within 30 days of purchase
  • If you're not completely satisfied, we've got you covered!

For complete terms, please refer to our Return Policy.