Van der Pauw measurment- source unit

[madhusoodan]

I wanted to study electrical behavior of thin films. Can anybody suggest me suitable source measure unit please?
(also of low budget)
Power supply: Voltage (few volts)
measurement: current (micro- milliamps)

 

[fresh_42]

I've found some cheap devices on amazon looking after "microampere meter" or "milliampere meter"

 

[madhusoodan]

Thanks . there are many as youmentioned

 

[M Quack]

You could use a lock-in amplifier to apply a small AC current using a shunt resistor and measure the AC voltage across the sample.