Hair Hygrometer, 105mm Diameter Lab Supplies_Filtering Supplies sized to read mid-stack battery

sized to read mid-stack battery voltages between the 5V and 15V meters in the line

Proves horizontal velocity does not affect vertical fall time through a push-button launcher that simultaneously projects one steel ball and releases another

this 500mm black lead pairs a 4mm plug at one end with a crocodile clip at the other

applied force

Hair Hygrometer, 105mm Diameter Lab Supplies_Filtering Supplies sized to read mid-stack batteryMetal cased hair hygrometer on a 105 mm dial reading 0 to 100 percent relative humidity in 1 percent divisions through hair fiber response, running battery free for direct room condition reads.