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.

UV/IR Wet Bench Flame Detector 3200/3300

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.

ultraviolet and infrared flame detector
1. Self-Test Models

Incorporate internal self-test for UV and IR sensors and associated circuitry for efficiency

2. Enhanced Models

Incorporate internal self-test and a RS-485 computer interface for downloading real time spectral data and pre-fire spectral data

3. Sealed Polypropylene Housing

Protect the technology from a wide variety of hazardous acids and solvents

4. Self-Diagnostics

Ensure the device is working properly by performing tests of the detector operation

5. State-of-the-Art Microprocessor

Recognize different types of flame signatures and reject common false alarms

6. Adaptability

Easily connect to most standard fire extinguishing systems and wet bench systems

7. Relay Output

Utilize relay outputs for alarm and trouble, not requiring any special controllers or wiring/junction boxes for ease-of-use


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


  • 3200/3300
    • Operating: 32o to 167oF (0o to 75oC)
    • Storage: -40o to 185oF (-40o to 85oC)


  • 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: 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

Sentry IT Fire and Gas Detection Solutions

A brief introduction to the sales, design and manufacturing facilities for Sierra Monitor Corporation's Sentry IT fire and gas solutions.