ZJ-12 (DL-7) and JZ-32 super high ionization vacuum gauge (usually called B-A gauge) has the features of compact design. ZJ-12 super high vacuum ionization gauge has the features of compact design, simple structure, small volume, low power consumption, easy for exhaust, stable and reliable measuring, wide measuring range, etc.. Its cover uses DM-305 glass cover (connection size is φ19±0.2mm) or ...