The Fluke i310s current probe is based on Hall Effect technology for use in measurement of both DC and AC current.The Fluke i310s may be used in conjunction with oscilloscopes and other suitable recording instruments for accurate non-intrusive current measurementFluke i310s features:Current Ranges: 30 A and 300 A ACRMS or ?45 A and 450 A DCMeasuring Ranges: ?45 A and 450 AOutput Sensitivity: 10 mV/A (40 A) to 1 mV/A (400 A)Resolution: ?50 mA (40 A) to ?100 mA (400 A)Load Impedance: > 10 k Ohms and? 100 pFFrequency Range (small signal): DC to 20 kHz (- 3 dB)Phase Shift below 1 kHz, < 2 degreesTemperature Coefficient: ?0.1% of reading / ?CPower Supply: 9 V Alkaline