JZ-51, M007, JZ-53 and JZ-54 series thermal couple gauge are a kind of low vacuum gauge head ... of simple in; ZJ-51 and M007 series long filament thermal couple (TC)vacuum gauge is a kind of low vacuum ... .ZJ-53 and ZJ-54 (M713, M714) series short filament thermal couple gauge have the advantages of rapid response, anti-oxidation ...