12V DC Power Supply for Hoffman Voltameter, CE Certified Glass Color_Transparent the wider-range Wheatstone-bridge reference

the wider-range Wheatstone-bridge reference

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

Removable full-term fetus in a 16

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

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

12V DC Power Supply for Hoffman Voltameter, CE Certified Glass Color_Transparent the wider-range Wheatstone-bridge referenceCE certified 12V DC power supply designed specifically for driving Hoffman voltameters during electrolysis demonstrations that separate water into hydrogen and oxygen.