Four Probe Method
Brand Name :DSS
Description
Resistivity of Semiconductors by Four Probe Method at Different Temperatures and Determination of Band-Gap The experiment consists of the following : 1. Four Probe Arrangement 2. Oven (upto 200ºC) 3. Sample : Ge Crystal mounted 4. Thermometer (0-200ºC) 5. Four Probe Setup (a) Constant Current power supply digital Accuracy:+0.25% of the reading+1 digit Load Regulation:0.03%for no load to full load (b) Electronic Milli voltmeter 200 mV Accuracy: + 0.1% of reading = 1 digit Impedance: 1 M ohm Display: 3½ digit, 7 segment LED (12.5mm) height with auto polarity and decimal indication.
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