Darkroom Enlarging Timer
Battery-powered timer for photographic darkroom enlargers with clock movement controlling precise exposure intervals and foot-candle metering. Features countdown and safe light control relay. HTS 9106.90.65.00 interval timing apparatus.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If photographic lab image projectors
Timing mechanisms integral to enlargers classify under Chapter 90 photographic equipment.
If timer relays
Electrical relays with timing function classify under Chapter 85 switches.
If other electrical equipment
Darkroom electrical control panels go to Chapter 85 miscellaneous electrical equipment.
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Import Tips & Compliance
• Include relay specifications and exposure accuracy certification
• Document darkroom-safe materials (no light leakage)
• Avoid enlarger integration that triggers Chapter 90 photographic equipment classification
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