UV/IR Wet Bench Flame Detector 3200/3300

Sierra Monitor’s 3200/3300 Series flame detector monitors for flames found in indoor applications, such as semiconductor wet benches, warehouses, and exhibition halls.

The 3200/3300 Series flame detector utilizes proven, stable ultraviolet and infrared technology to continuously monitor for flames in wet bench and commercial applications. It is an ideal solution for use in areas where short line of sight is a factor. Due to its compact size, it is also used for installation in certain production equipment.

The standard 3200/3300 module has a sealed polypropylene housing designed for protection from a wide variety of acids and solvents. The detector is rated over a wide operating temperature range for those applications where drying or heating elements are used or elevated temperatures may be experienced. Both models can easily adapt to most standard fire extinguishing systems and wet bench systems. In addition, 3200/3300 modules use state-of-the-art microprocessor controlled fire algorithms to recognize different types of flame signatures while rejecting common false alarms.

The UV/IR Flame Detector 3200/3300 is approved and certified by a variety of third party agencies, including FM and CSFM. These approvals and certifications assure our customers that we carry only the highest quality of products and performance.

UV/IR Wet Bench Flame Detector 3200/3300

  • Self-Test Models – Incorporate internal self-test for UV and IR sensors and associated circuitry for efficiency
  • Enhanced Models – Incorporate internal self-test and a RS-485 computer interface for downloading real time spectral data and pre-fire spectral data
  • Sealed Polypropylene Housing – Protect the technology from a wide variety of hazardous acids and solvents
  • Self-Diagnostics – Ensure the device is working properly by performing tests of the detector operation
  • State-of-the-Art Microprocessor – Recognize different types of flame signatures and reject common false alarms
  • Adaptability – Easily connect to most standard fire extinguishing systems and wet bench systems
  • Relay Output – Utilize relay outputs for alarm and trouble, not requiring any special controllers or wiring/junction boxes for ease-of-use

Specifications for UV/IR Wet Bench Flame Detector 3200/3300


  • 3200: 3 seconds to a 4 inch diameter isopropyl alcohol pan fire (on-axis) @ 10 feet
  • 3300: Typically responds within 5 seconds to a 1 sq. ft. heptane pan fire (on-axis) @ 45 feet

Field of View

  • 3200: 120o full cone
  • 3300: 120o full cone (NFPA 72-1993, 5-4.2.1)

False Alarm Immunity

  • 3200: Does not alarm to sunlight, fluorescent lights, flashlights, or infrared heaters
  • 3300: Does not alarm to sunlight, fluorescent lights, incandescent lights, flashlights, or infrared heaters

Input Voltage

  • 3200: 12 to 30 volts DC, typically 24 VDC
  • 3300: 12 to 32 volts DC, typically 24 VDC

Current Draw

  • 3200/3300: @ 24 VDC; 28 mA normal mode; 54 mA alarm mode

Operating Range

  • Temperature
    • 3200/3300
      • Operating: 32o to 167oF (0o to 75oC)
      • Storage: -40o to 185oF (-40o to 85oC)
  • Humidity
    • 3200/3300: 10 to 90% RH

Typical Fire Type

  • 3200: FR & HB polypropylene and isopropyl alcohol

Red LEDs

  • 3200/3300:Two indicating Normal Operation and Trouble/Alarm

Alarm Relay

  • 3200/3300: 1.0 amp @ 30 VDC resistive

Trouble Relay

  • 3200/3300: 1.0 amp @ 30 VDC resistive

UV Sensor

  • 3200/3300: Solar-blind ultraviolet sensor – radiant energy in the 185 to 260 nm band

IR Sensor

  • 3200/3300:Solid state infrared sensor detecting IR energy in the .715 to 3.5 microns

Tested Fuels

  • 3300: Gasoline (Heptane), Polypropylene, Isopropyl Alcohol, MEK, Hydrogen, and Silane

Acid/Solvent Resistant Surfaces

  • 3200/3300: Resistant to sulfuric acid, phosphoric acid, hydrofluoric acid, hydrochloric acid, ammonium hydroxide, nitric acid, isopropyl alcohol, deionized water, chromium phosphate, n-methylpyrrolidane, organic solvent base photoresist strips, ozone, etc.


  • 3200: FR Polypropylene (IP67, UL94 flammability rating V0) or (Polyvinylidene Fluoride – PVDF available) (for models -2X and -3X) with a 6 foot pigtail (8 wires standard – 4 wires for the fire relay, 2 wires for the trouble relay and 2 wires for the power)
  • 3300: FR Polypropylene (IP67). Detector housing meets UL94 flammability rating V0. A mounting bracket makes it easy to mount the housing. A 45o adapter is also available


  • 3200: 3.4 x 4.2 x 1.0 inches (8.6 x 10.7 x 2.5 cm)
  • 3300: 3.4 x 5.4 x 1.0 inches (8.6 x 13.7 x 2.5 cm)


  • 3200/3300: 1 lb (0.5 Kg)


  • 3200: FM Approved, CSFM 7210-1608:101
  • 3300: FM Approved
  • PDO Approval: Petroleum Development Oman Certificate of Registration
  • ISO 9001:2008: Registered Quality System

How to Purchase the UV/IR Wet Bench Flame Detector

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