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optical bubble counter

optical bubble counter: Ø24 × 70 chamber, ¼ in barbs in and out, inlet tube to 10 above the floor, two Ø5.1 LED holes facing across the bubble path 22 up — printable, 45° rims

Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, CC BY 4.0 (credit "Xem Studio")

Dimensions

chamber_bore_mm24
chamber_h_mm70
beam_height_mm22
led_hole_mm5.1
barbs¼ in in / out
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From the full sheet

Printable tri-clamp (45°): Optical bubble counter for a blow-off line: 5 mm LED break-beam, ¼ in barbs: every size, notes, mating features and sources. How do I count fermentation bubbles electronically (3D printable)?