Trek 540-1 Surface Resistance/Resistivity Meter
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-Virtually infinite input resistance design
Less than 0.1 picoampere ion current required for full accuracy and stability
-More than 2000 times more sensitive than competing designs
31/2 Digit DPM displays present voltage readings with 0.1V
-LED bar graph displays present voltage and holds most positive (+) and most negative (-) voltage values
-Programmable audio/Visual alarms
-DC stable in ion fields
-Bandwidth greater than 2.5kHz
-Measurement range ± 100 V DC or peak AC
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