Heath Potentiometric Amplifier EU-200-01 from Cosmic Ray experiment

Heath Potentiometric Amplifier and DC Offset Module EU-200-01 EU-200-02

Heath Capacitor Substitution Box Model EUW-29

New Thermo Ion Transfer Tube, 450 Micron - PN: 97133-20001, LC-MS

Heath Capacitor Substitution Box Model EUW-29

Cole-Parmer P200-01 Series Benchtop pH and pH/Conductivity Meter

Heath Computer Oscilloscope 4802

Heath SC-4802 Computer Oscilloscope 120 VAC 60Hz Heathkit