SRM Probe Head

SRM Probe Head

The SRM Probe Head is a plastic bodied four point probe head which is applied by hand. The connection to the probe head from the SRM-232 electronics is via a female RJ45 con-nector which is the same type of connector used for Ethernet connections. The SRM-232 four point probe systems include one SRM Probe Head and one of the coiled cables shown below.

The 8 conductors of the cable are as follows:

  • 1-not used
  • 2-not used
  • 3-current in
  • 4-voltage read
  • 5-voltage read
  • 6-current out
  • 7-not used
  • 8-not used

 

Probe Tips Specification Choices

  • Tip Spacing: 40, 50, or 62.5 mils
  • Spring Loads: 45, 85, or 180 grams per tip
  • Tip Material: tungsten carbide or 50% osmium alloy
  • Tip Radii: 1.6, 5, or 10 mils.

 

The probe is also available with the “flush mount” housing in which the tips are recessed deeper into the outer housing so that the tip retraction is limited, resulting in an even lower spring pressure than the 45 gram load (see page 4 for an im-age showing the difference between the standard housing and the flush mount housing).

 

Standard Versus "Flush Housing" Probe Types

 

Standard SRM Probe
 
Flush Housing Probe

 

The "flush housing" probe has the inner probe assembly mounted further into the housing so that probe tip retraction is limited. This significantly reduced probe tip pressure for use when measuring very soft materials or easily deformed substrates.

 

SRM Probe Head Dimensions

 

SRM Probe Head Dimensions

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