Smoke Density Photodiode
Infrared photodiode for smoke obscuration measurement in fire alarm systems. HTS 8541.49.10 classification for photosensitive detection of light attenuation. Used in duct smoke detectors and clean room monitors.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If complete fire/smoke alarm
Finished fire detection apparatus classifies under electrical signaling.
If parts of dust/smoke filters
Smoke detectors integral to filtering equipment classify as filter parts.
If gas/smoke analysis instruments
Complete smoke measuring instruments classify in Chapter 90.
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Import Tips & Compliance
• Specify obscuration sensitivity (%/meter)
• UL/fire safety certifications required
• Distinguish from ionization chamber detectors
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