4 Pt probe is good if you have one.  If you need to purchase, then
purchasing a simple P/ N type tester probe would be far cheaper.  The
other answer is to find a colleague in a wafer house or other university
to test the wafers for you.
Where are you located ?

Regards
Ken
Kmbh Technologies- Specialty CZ and Float Zone  Silicon and glass
wafers. SOI , Thin , thick, optical, Standard.

Suraj Patil wrote:

>use 4 -point probe  to measure
>
>
>> <>dear Sir
>> Please suggest me an accurate way to ascertain the conductivity type
>> (n-type, p-type) of the wafer.
>> Pourus
>