The Yokogawa 201131 Portable DC Ammeter, 3/10/30/100 µA, 5.1/18.3/7.7/2.5 kΩ is a moving coil type of instruments using a taut-band suspension system. The suspension system provides excellent reproducibility without friction and strong resistance to shock impact. This precision instrument combines a magnetic circuit (sandwich mechanism) that blocks the effects of external magnetic fields, and a superior temperature compensation circuit. Product Features: Taut-band suspension system eliminates friction and provides strong resistance to shock impact Stable performance ensures that changes over time are negligible Quick response and easy-to-read scale Superior temperature compensation circuit reduces external temperature effects Magnetic circuit (sandwich mechanism) reduces effects of external magnetic fields Max. Scale Value: 3/10/30/100 µA Approximate Internal Resistance and Consumed Power: 5.1/18.3/7.7/2.5 KΩ Operating Principle: Permanent moving coil Class JIS C 1102: 1997 Class 0.5 (Equivalent to class 1.0) Operating Position: Horizontal Scale Length: Approximately 135 mm (Deflection Angle: 85°) Scale Divisions: 100/150 Linemax: 250 V Operating Temperature Range: 0 ~ 46 °C Operating Humidity Range: 30 ~ 75% RH