12V DC Power Supply for Hoffman Voltameter, CE Certified Glass Color_Transparent Larger-aperture 75mm lens at a

Larger-aperture 75mm lens at a 15cm focal length captures more of a specimen at a glance

this microphone amplifier connects a microphone input to both an integrated speaker and an oscilloscope-driving amplified signal for waveform study

Life-size digestive system model in two parts reveals the esophagus-to-rectum path with stomach

Single-degree graduations and a non-magnetic plastic case allow this 100mm tangent compass to mount on any tangent galvanometer for precise direction-and-deflection readings

this pipette-type hydrometer draws electrolyte into a glass body with a colored-zone float for direct reading

12V DC Power Supply for Hoffman Voltameter, CE Certified Glass Color_Transparent Larger-aperture 75mm lens at aCE certified 12V DC power supply designed specifically for driving Hoffman voltameters during electrolysis demonstrations that separate water into hydrogen and oxygen.