Tel: (480) 988-2256 Fax: (480) 452-0172

Common Four Point Probe Tip Radii and Spacings

Jandel Table of Typical Needle Spacings

Common Needle Spacings:

American

English (Imperial)

Metric

Sometimes expressed as

25 mils

0.025″

0.635mm

0.636mm

1/(5π) cm

30 mils

0.03″

0.762mm

1.000mm

40 mils

0.04″

1.016mm

50 mils

0.05″

1.27mm

62 mils

0.062″

1.575mm

62.6 mils

0.0626″

1.59mm

1.591mm

1/(2π) cm

 
Most Jandel probes are available with needle spacing anywhere in the range from 20 mils (0.5mm) up to 62.6 mils.

Common Needle Radii:

American

English (Imperial)

Metric

1.6 mil

0.0016″

40µ

2 mil

0.002″

;

50µ

4 mil

0.004″

100µ

8 mil

0.008″

200µ

10 mil

0.01″

250µ

20 mil

0.02″

500µ

 
Jandel probes are available with tip radii anywhere in the range from 0.5 mils (12.7 microns) up to 20 mils (508 microns).


Four-Point-Probes is a division of Bridge Technology. To request further information please call Bridge Technology at (480) 988-2256 or send e-mail to Larry Bridge at: sales@bridgetec.com