ONLY Napson manufactures both Contact and Non-contact resistivity measurement systems.
Please refer to the tables below for features & resistivity ranges of each measurement type.
For additional information, please contact us by the Contact form.
|Contact type [4point probe method]||Non-contact type [Eddy-current method]|
|Measurement area||3mm（or 1.5～4.77mm）||φ5～60mm|
(*Determined by test sample thickness ）
・Measurement is absolute
・Narrow measurement area
・No damage by contact
・ No influence of contact resistance
|Disadvantage||・Sample may be damaged by probe contact||
・Calibration to a reference resistivity sample is required
・Sample thickness is limited by probe gap
*Please download Measurement range chart as above by followings.