Turbidity Tube with Secchi Disc, 120cm Scale Length_150mm Handmade wooden spice rack holds

Handmade wooden spice rack holds twelve 6-inch borosilicate glass test tubes with caps and includes a filling funnel for kitchen-to-lab cross-over gifting

Enclosed spectrum tube power supply rated for 26 cm tubes

Pink-dotted ends and steel keepers across this 50 x 12mm Alnico cylinder pair simplify pole identification while the keepers preserve field strength during cardboard-box storage

sized for short-run student wiring of buzzers

Compares radiant-heat absorption through paired surfaces and a white screen

Turbidity Tube with Secchi Disc, 120cm Scale Length_150mm Handmade wooden spice rack holdsUsed to measure water clarity in streams, ponds, and lakes, this turbidity tube drains through a Hoffman clip hose until the Secchi disc pattern becomes visible from above.