Probe Terminology

Plunger Tip

• Contacts the Unit Under Test (UUT).
• Proper configuration is critical for good contact and electrical performance.

Plunger Shaft

• The cylindrical part is critical to pointing accuracy of probe assembly.
• Primary point of electrical contact between plunger barrel.
• Probe life is influenced by the plunger shaft’s wear characteristics.

Crimp

• A precise deformation of the barrel at a specific location retains the plunger tail.
• A spin crimp, dimple crimp, or a roll over crimp may be used depending on the probe series.

Plunger Tail

• The enlarged bottom part of the plunger that retains the plunger.
• Secondary point of electrical contact between the plunger and the barrel.

Barrel

• Housing for spring and guides the plunger.
• Typically completely housed by the mating receptacle.
• Important electrical link between plunger and receptacle.

Spring

• Helical coil spring for maintaining a consistent counter force to the plunger.
• Force determined by application.
• Base material determines probe performance in extreme temperatures.

Receptacle Terminology:

Press Ring

• Larger than recommended mounting hole; deforms slightly for press-fit into mounting hole.

Alignment Bulge

• Aligns receptacle in mounting hole prior to installation.

Barrel Housing

• Critical electrical link which houses the barrel of the probe.

Detent

• Provides retention and electrical connection to probe barrel.
• Single or multiple detents based upon size.

Wire Termination

• Means to connect wire for electrical passage.
• Configured for crimping, soldering, wire wrapping, terminal insertion, or with preattached wire.