Get current pricing for Micromass, ET/MM301 Auto Transf Micromass Et/mm301 Mass Spectrometer Auto Transformer . Primary: 120 Volts, 27 Amps, Phase 1, Hz 50, Kva 3.22. Secondary: 230 Volts, 14 Amps. Sold As- . Product Category: Lab Equipment, Sub Category: Mass Spectrometer: