Spot Reflecting Galvanometer PSAW For detection of low currents of the order of microampere This is a self contained reflecting galvanometer, housed in a aluminium case with built in lamp and scale , transformer for working on 220V AC 50Hz. Universal shunt is also fitted inside with shunt power of X1, X0.1, X0.01, X0.001. COIL RESISTANCE :100 ohms(direct) SENSTIVITY : 15mm to 20mm/micro-amp. PERIOD : 2 second (nominal) RANGE ATTENUATION : Senstivities of X1, X0.1, X 0.01, and X 0.001 related to both voltage and current, with constant input resistance. CRITICAL DAMPING RESISTANCE : 1000 ohms SCALE DIVISON : 18mm divided in mm/ cm with left hand and centre zero scales. DIMENSIONS : 295x210x130mm Approx. REPLACEMENT LAMPS : 6.2V, 0.3A