A.C ammeter-voltmeters
The general features & function & mounting dimension of panel meter:
Specification :

A.C AMMETERS

Type SF-48(48X48mm) SF-72(72X72mm) SF-96(96X96mm) SF-144(144X144mm)
  Direct CT/1A-/5A Direct CT/1A-/5A Direct CT/1A-/5A Direct CT/1A-/5A
  F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2
1A         ●○ ●         ●○ ●  
5A ● ● ● ● ●○ ● ●○ ● ●○ ● ●○ ● ● ● ● ●
10A ● ● ● ● ● ● ●○ ● ●○ ● ●○ ● ● ● ● ●
15A ● ● ● ● ● ● ●○ ● ● ● ●○ ● ● ● ● ●
20A ● ● ● ● ● ● ●○ ● ● ● ●○ ● ● ● ● ●
25A ● ● ● ● ● ● ●○ ● ● ● ●○ ● ● ● ● ●
30A ● ● ● ● ● ● ●○ ● ● ● ●○ ● ● ● ● ●
40A ● ● ● ● ● ● ●○ ● ● ● ●○ ● ● ● ● ●
50A     ● ● ● ● ●○ ● ● ● ●○ ● ● ● ● ●
60A     ● ● ● ● ●○ ● ● ● ●○ ● ● ● ● ●
75A     ● ●     ●○ ● ● ● ●○ ● ● ● ● ●
100A     ● ●     ●○ ● ● ● ●○ ● ● ● ● ●
120A     ● ●     ●○             ● ●
150A     ● ●     ●○ ●     ●○ ●   ● ●
200A     ● ●     ●○ ●     ●○ ●   ● ●
250A     ● ●     ●○ ●     ●○ ●   ● ●
300A     ● ●     ●○ ●     ○○ ●   ● ●
400A     ● ●     ●○ ●     ●○ ●   ● ●
500A     ● ●     ●○ ●     ●○ ●   ● ●
600A     ● ●     ●○ ●     ●○ ●   ● ●
800A     ● ●     ●○ ●     ●○ ●   ● ●
1000A     ● ●     ●○ ●     ●○ ●   ● ●
1200A             ●○ ●     ●○ ●  
1250A             ●○ ●     ●○ ●   ● ●
1500A             ●○ ●     ●○ ●   ● ●
2000A             ●○ ●     ●○ ●   ● ●
2500A             ●○ ●     ●○ ●   ● ●
3000A             ●○ ●     ●○ ●   ● ●

A.C Voltmeters

Type SF-48 sf-72 SF-96 SF-144
100V ● ●○ ●○ ●
300V ● ●○ ●○ ●
500V ● ●○ ●○ ●
600V ● ●○ ●○ ●

● 90o
○ 240o Interchangable scale