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