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F2 FLAME-i UV / IR Flame Detector

Product Literature

Model F2 FLAME-i Triple-Mode UV/IR Flame Detector Sensor is an economical, compact, and high performance flame detector for use in non-hazardous applications.  The flame detector has multiple modes of operation and can be set by the user to either Triple Mode UV/IR or UV Only Mode.  In “Triple Mode” setting, the flame detector uses one UV sensor and two IR sensors and is “voted” two out of three to signal an alarm.  This unique feature allows the detector to eliminate false alarms and improved reliability.  The flame detector has been designed to provide a fast response in the detection of fires which makes it ideal for high-value equipment monitoring.  Includes wall/ceiling mounting bracket and multi-conductor cable.  5 Year Warranty.  Made in the U.S.A.

Keywords:  UV/IR Flame Detector, UVIR Flame Detector, UV Flame Detector


Features and Benefits

  • For non-hazardous applications only
  • Triple-Mode UV/IR flame detector:  one UV sensor and two IR sensors
  • Voltage-free contact to control or shutdown external equipment
  • Detection range of 90 feet (28 meters)
  • High and Low Sensitivity Settings
  • Specialized Sapphire Lens
  • Adjustable Field-of-View
  • Fast response
  • Compact and Lightweight
  • Automatic Reset
  • Solar Blind
  • Not blinded by dense smoke
  • Ideal for high-value equipment monitoring, public buildings, transportation terminals, offices, laboratories, warehouses and indoor applications.
  • Fast response
  • Housing is made from a weatherproof glass-reinforced plastic material with excellent rigidity and environmentally-friendly
  • Discriminates against Arc Welding Radioactive sources (x-ray), sunlight, lightning, or black body radiation
  • 24 volt DC nominal operating voltage
  • 5 Year Warranty
  • Made in the USA
  • Available flame detector test lamp, Model FT194 Flame Detector Test Equipment



The SST Model F2 F:AME-i Triple Mode UV / IR optical flame detector sensor is for non-hazardous applications and uses the latest state of the art processor and circuitry. Outputs are either voted automatically, or can be manually selected by the customer. Selected outputs can either be for UV only, IR only, Temperature, or any two out of three combination. This “voting” capability is what sets this detector apart from any other UV/IR flame detector sensor. This flame detector sensor will see a fire, while other manufacturer’s flame detector sensors may not.


Physical Description

The Model F2 FLAME-i UV/IR Flame Detector Sensor is self-contained in a two piece glass-reinforced plastic housing.  The flame detector sensor is suitable for use in “non-classified” areas. A sapphire window in the front of the housing permits both ultraviolet and infrared radiation to strike the sensing elements inside. Electrical connections are made through a ¾ inch threaded outlet on the rear of the flame detector, suitable for connection to electrical conduit or a cable gland.

Operational Description

Contained within the Model F2 FLAME-i are the UV, IR and heat sensing elements and associated electronics, three (3) relays, and screw terminal blocks for wiring. The detector may be installed for completely self-contained operation, utilizing the relays to control local equipment directly. Additionally, the alarm and status conditions may be transmitted by the flame detector to a central control room. The relay contacts, if not being used for local control, may be hard-wired to the control room to transmit these conditions. Or all conditions may be transmitted over a single wire by using the available 0-20 mA signal.

When the detector is installed and operating normally, the green “Ready” light will be visible through the flame detector window. This provides a rapid visual check of flame detector operation. The Model F2 FLAME-i Detector Sensor responds to a flame with a variety of criteria and time delay settings. An internal switch sets the flame detector sensor to the most appropriate mode for the exact conditions at your particular installation.

When flame radiation is initially detected, the Alarm Outputs, the relay contact is instantly activated. A red Alarm light behind the viewing window in the flame detector is also activated.


Architect's and Engineer's Specifications

Flame detection capability shall be provided by a triple mode UV / IR flame detector. The detector shall provide a minimum 70 foot on-axis sensitivity to a standard 1 square foot 87 octane unleaded gasoline fire. The detector shall not be susceptible to common false alarm sources such as lightning and arc welding, nor blinded by dense smoke or oil film on the viewing window. The sensor sensitivity response time shall be user selectable.

The detector shall provide relay outputs for Alarm, Delayed Alarm, and Malfunction in addition to a 0 to 20 mA current loop capable of reporting the same conditions over a single wire.

All electronics shall be contained in a single user replaceable module which does not require field wiring or unwiring for replacement.  Safety Systems Technology Model F2 FLAME-i UV/IR Flame Detector Sensor, or approved equivalent, shall be supplied.

Typical Applications

Typical applications include:

  • Non-hazardous environment
  • Production line
  • Manufacturing facilities
  • High value equipment monitoring
  • Test laboratories
  • Warehouses
  • Storage facilities
  • Lithium ion battery storage sites


Q.  What type of flame detector is Model F2 FLAME-i?
A.  SST’s Model F2 FLAME-i is a UV/IR flame detector.

Q.  Can the F2 flame detector be used in hazardous locations?
A.  No.  The F2 is a general purpose UV/IR flame detector specifically designed for use in non-hazardous locations where no combustible gas are present.

Q.  Can the F2 upon detecting the presence of a fire shutdown equipment and sound an alarm?
A.  Yes.  The F2 has built-in contact relay to initiate system shutdown or signal an alarm.

Technical Specifications and Ordering Information

Technical Specifications

Flame Sensitivity: Reliably detects a 1 square foot gasoline fire at a distance of 90 feet. Response to radiation detected is less than 0.5 seconds
Cone of Vision: 90 degrees
Spectral Sensitivity: UV: 1850 to 2450 Angstrom IR: 4.3 Microns (Hydrocarbon CO2 spike)
Detection Modes: UV only, IR flicker only, IR flicker and Temperature, UV/IR (voted any two out of three detectors)
Relay Outputs: Alarm
Relay Contact Ratings: 6 amps @ 28 VDC or 300 VAC resistive, 1/8 HP @ 120/240 VAC
Alarm Reset: Automatically resets when radiation is no longer detected
Operating Temperature: -40 to +85oC, -40 to +185oF
Power Requirements: 20 to 35 Volts DC 125 mA standby, 230 mA alarm at 24 VDC

Ordering Information

140-01 Model F2 FLAME-i UV / IR Flame Detector Sensor with mounting bracket