Simple Respirometer for Biology Experiments Subcategory_Thistle Funnels Hand-operated pressure pump supplying positive

Hand-operated pressure pump supplying positive pressure for gas-law

sized so the heavier D cell stays seated when student-built circuits are picked up

sized to demonstrate cathodic deposition and the coulometric form of Faraday's first law

Frontal and median head sections expose brain

providing a direct numeric current reading for student circuits where analog needle deflection would be too coarse to resolve cleanly

Simple Respirometer for Biology Experiments Subcategory_Thistle Funnels Hand-operated pressure pump supplying positiveSimple respirometer measures oxygen consumption in germinating seeds, small animals, or yeast cultures for metabolic rate experiments in biology labs.