Demonstration Meter Interscale - The meter can be used to demonstrate the working principle of AC or DC ammeters or voltmeters with the interchangeable plastic scales. Housed in an ABS plastic case 300 x 150 x 300mm with glass front and rear. Moving coil type with accuracy of ±; 2.5%. Basic sensitivity of meter is 5 mA, 100mV f.s.d. -