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20_20_R
  • General
  • Feature
  • Specification
The 20-20 R SharpEye Single-IR Optical Flame detector incorporates the advanced flame analysis algorithms employed in the SharpEye line of UV/IR and IR3 optical flame detectors, combined with a cost effective electromechanical design to produce a low-cost flame detector. The 20-20 R flame detector was designed to provide early warning of flaming fires involving organic (hydrocarbon fuels & vapors) materials. These fires emit strong IR radiation in the 4.4 micron spectral band where the CO2 (main combustion product of any organic substance) has a unique spectral peak. The detector contains an infrared sensor & optical filter that provides maximum sensitivity to the CO2 emission spectral band at 4.4 microns and improved immunity to false alarms caused by environmental IR emitting sources, including sunlight & IR projectors. The detector was designed to withstand ldquo;harsh” environmental conditions, including extreme temperatures, high humidity, vibrations, etc. Most single band IR detectors are based on pyro-electric sensors with a 4.4 micron optical filter, and a low frequency (1-10 Hz) electronic band pass filter (characteristic of a flickering flame). This type of detector identifies a fire when the IR radiation emitted from a 1 sq. ft. gasoline pan fire at 4.4 microns from a distance of 50 ft. (15m) is above a predetermined value.
• Automatic & manual built-in-test • Enlarged field of view 90°H./90°V • Immune to false alarms • CENELEC/ATEX approved • MTBF minimum 100,000 hours • 4-20 mA & RS-485 interface • Stainless steel option
mechanical Dimensions: 220 x 132 x 132 mm Weight: Aluminium: 3.5 Kg Base 1.7Kg Spectral response: Single IR band. IR: 2.5-3 microns. Detection range: 1 sq.ft. gasoline fire @ 15m* 1 sq.ft. diesel oil fire @ 7.5m* 1 sq.ft. n-heptane fire @ 15m* 1 sq.ft. 95% alcohol fire @ 10m* 1 sq.ft. JP4 fire @ 10m* * Highest sensitivity setting. Response time: Max. 10 seconds. Adjustable time delay up to 30 seconds. Sensitivity range: Two sensitivity ranges: 1 - 15 ft. (5m) 2 - 50 ft. (15m) Field of view: 90° horizontal, 90° vertical. Built-in-test: Manual & automatic BIT. Temperature range: Operating: - 40°F to 160°F Storage: - 65°F to 185°F Humidity: Relative humidity of up to 95% for the operational temperature. electrical Operating voltage: 18-32 Vdc Power consumption: Max. 70mA in stand-by Max. 130mA in alarm Electrical connection: Two standard ¾” 14 NPT cable entries. Optional two M25 x 1.5 cable entries. Electric input protection: Complete electrical interface protection against reversed polarity voltages, surges, and spike according to MIL-STD-1275. Electromagnetic compatibility: The detector is designed and approved according to the following EMC requirements: Electrostatic discharge IEC801-2:1984 Conducted emission EN55022 Class A Radiated emission EN55022 Class A Radiated immunity IEC801-3: 1984 EFT/B: IEC801-4:1988 Outputs: Dry contact relays: Alarm: 2 Amps @ 30 Vdc 0.5 Amps @ 250 Vac Accessory: 5 Amps @ 30 Vdc & 250 Vac Fault: 5 Amps @ 30 Vdc & 250 Vac **4-20 mA current output: The 4-20mA is sink and can be supplied as source. Fault: 0 ± 0.5mA Normal: 5 ± 0.5mA Warning: 10 ± 1mA Alarm: 15 ± 1mA Resistance loop: 100-600 Ohms RS-485 communication: The detector is equipped with an RS-485 communication link that can be used in installations with computerized controllers.
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