Mumbai-based shanti electric instruments supplies offers bimetal ammeters. These bimetal ammeters are provided with moving iron and find their applications iniron used for measurement of instanteneous rms value of current, mean rms and maximum value. Some technical features of these bimetal ammeters include: these are available in sizes 72 x 72 mm and 96 x 96 mm. Measured quantity: mean rms value and maximum value and instantaneous rms value of current; range of measurement - 1 a and 5 a, 8 mins or 15 mins; proof voltage - 3 kv ac; and weight [approx in kg] - 72 x 72 = 0.30 kg, and 96 x 96 = 0.35 kg.