FSX Flame Detectors

Honeywell main product image
roll over image to zoom in

FS20X Flame Detector

Part of the FSX family of electro-optical flame detectors, the FS20X represents a quantum leap in integrating infrared and ultraviolet sensing technologies.
Features & Benefits
  • Detects hydrocarbon and non-hydrocarbon fuel fires in all environmental conditions
  • Range greater than 200 feet to 1 sq. ft. heptane fire
  • Arc welding immunity 
Quick Specs
  • Field of view: 90° full 100% core of vision, ± 45° from on axis
  • Operating voltage: 24 VDC nominal (18-32 VDC) - regulated
  • Sensitivity: Very high, high, medium and low - switch selectable 


  • Fire and Gas Consultancy Services
Need Assistance?
USA
Call: 1-800-538-0363
Enter your name and phone number and a Honeywell representative will contact you shortly.
SSL Lock SSL Secure
Don't worry, we won't share your phone and email address. (privacy policy)

Product Overview

Based on the foundation of the highly successful and reliable SS4 Flame Detector, the FS20X Flame Detector represents a quantum leap in integrating Infrared and Ultraviolet sensing technologies. The FS20X is a Multi-Spectrum and UV/Dual IR/VIS Flame Detector with a proven UV solar-blind sensor. The FS20X exhibits faster false-alarm free response to fires over a wider temperature range and with a much longer detection range compared to conventional UV/IR detectors.

Conventional and older technology UV/IR detectors, using narrow band 4.3 micron IR sensors, will not respond to smoky fires or if the detector lens is contaminated with oil and other substances since both UV and 4.3 micron signals are attenuated, obscured or absorbed by thick smoke or detector lens contaminants. Also, these old technology UV/IR detectors will not alarm to any fire if they are installed behind ordinary window glass.

Dual microprocessors provide a high level of fail-safe operation combined with fast and reliable performance. The Master Microprocessor performs high-speed digital sampling and signal processing calculations; while the slave microprocessor handles various sensor data, performs communications, self-diagnostics and provides interface versatility; and additional memory for storing Event Log and FirePic™ data.

The FS20X Flame Detector has a detection range in excess of 200 feet (very high sensitivity setting) for the detection of a one square-foot Heptane reference fire and has a cone of vision greater in volumetric coverage than most UV/IR detectors. This means fewer detectors can be used as compared to other manufacturers’ detectors.

Additional Features and Benefits

  • Patented* WideBand IR™ Infrared combined with Ultraviolet
  • Detection range greater than 200 feet to 1 sq. ft. heptane fire
  • Patented* Electronic Frequency Analysis
  • Visible Sensor for optimum false alarm rejection
  • Selectable detection sensitivities
  • Solar blind 90° full 100% cone-of-vision
  • Dual Microprocessors for reliable performance
  • Real-time clock for accurate time dating of events
  • FirePic™ — Up to 6 pre-fire event data storage
  • Event log — Up to 200 events with date and time stamp
  • Built-in RS-485 ModBus Communication
  • Built-in non-isolated 4-20 mA analog output (sink or source)
  • Alarm, Fault and Fire Verification relays.
  • Automatic Optical Path and Electronic Self-Test
  • Widest operating temperature range
  • Patented* Electronics Module for components protection with plug-in terminations for easy field installation
  • Two ¾” NPT OR 25mm conduit entries
  • Low power consumption
  • High RFI and EMI immunity
  • FM approved

Benefits

  • Detects hydrocarbon and non-hydrocarbon fuel fires in all environmental conditions
  • Arc welding immunity
  • False alarm rejection for all environmental conditions
  • Minimal maintenance for trouble-free operation
  • PC software and Interface Module (FSIM) for fault diagnostics real-time graphs (RTGs), and downloading of FirePics™ and event log
  • Suitable for a wide variety of applications.

Multi-Spectrum and UV/Dual IR/VIS Fire Sentry FS20X - Honeywell Analytics

Popular Accessories

From power options to carrying cases, we have a multitude of accessory items to go with your monitor.
No Photo Available

FS20X Optional HART Module

FSX-A014
FS20X Optional HART Module
SH-001

SH-001

SH-001

Sunshield for SS2, SS4, FS24X and FS20X Detectors, 316 Stainless Steel.

SM4

SM4

SM4

Stainless Steel Swivel mounting assembly for FS24X, FS20X, SS4, SS2 detectors.

Frequently Asked Questions

Have a question about the product features or warranty? Find the answers here.
We do not sell our products directly on our website but we would be happy to assist you with your gas detection needs.  On each product page you will see a red button on the right-hand side titled “HOW TO BUY”.  If you click on this button a form will appear which will go directly to one of our sales representatives once completed and submitted.  

You can also call one of our sales representatives directly.  Click here to go to the Contact Us page.  

There are two areas where you can access technical documents.  First, you can visit our Technical Library in the Support section of the website.  Here you will be able to access our entire catalog of documents and videos for all products – current and legacy products.  

You can also access the technical documents for each product on that product’s respective page within the website.    


Yes we do.  Check out our HA University training section to see what programs are available and sign up for any that you are interested in.  These courses are very informative and led by our expert engineers.  If you have any questions about training opportunities for yourself or your staff and would like to talk to a Honeywell representative, click here.

Check out the Product Inquiry page in the Contact Us section.  Here you’ll find sales contacts for each of our product lines and they can help you with any questions you may have from technical specifications to ordering information. 

Check out the Service & Repairs page in the Contact Us section.  Here you’ll find the contact information for our service centers in your region. 

There are several ways you can search for products on our website:

  • Click on the Products link in the main navigation to search by product lines.
  • Find products for a specific Industry or Application by clicking on the links in the main navigation bar at the top of the page.
  • Use our Gas Finder if you’re looking for a product that can detect a specific type of gas.
  • If you still can’t find the product you’re looking for, type the name of the product in the search bar at the top of the page.

Because we do not sell our products directly we cannot quote a specific price on our website.  Contact a sales representative through either the “HOW TO BUY” button on the product page or by calling them and they will be able to obtain pricing from local distributors in your area. 

Similar Products

Check out some of these similar products.
Multi-spectrum Triple IR (IR/IR/IR/Visible) flame detector - Fire Sentry FS24X - Honeywell Analytics
Sophisticated software algorithms and dual microprocessors ensure that the FS24X has the highest fire detection performance combined with optimal false alarm rejection.
Applications: Flame DetectionAviationWelding