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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

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

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?