True Kelvin Probe Design with series resistor on one contact probe
True Kelvin connection, each probe is connected to one SSMC connector, the ground/guard is shared.
Requires only one micropositioner for 2 connections.
Low current design, (<10fA)
Excellent for use with LCR's, or applications that require sensitive probe resistance correction through instrument "sense" line.
A series resistor is connected between rear SSMC and probe contact (inquire for values).
Identical to the 73APT series-100K probe with a series resistor.
Less than 10 fA resolution.
Probe pitch (distance between probes) can be ordered from 12 to 100 um.
Very low parasitic capacitance design.
(*Specify radius, pitch and resistor value upon ordering)
Material: Type II Gold plated brass/copper Connectors: Two SSMC connectors, with each being connected to one of the two semi-rigid coaxial probes creating a True Kelvin connection. The SSMC positioned furthest from the probe has a series resistor (SM-603 series - 1/16 watt) between the probe and connector mounted within the body. The probe mounting shank is: 0.124" ~ 0.125". The probes of the 73APT-100K are not replaceable due to the co-planarity issues with the Kelvin contact. The typical probe contact co-planarity is within 3-5 microns.
Current leakage: < 10 fA. Frequency: > 150 MHz Capacitance (Guarded): < 10 fF Impedance: 50 Ohm Power Handling: > 125 Watts @ 18-21 Deg. C Voltage Rating: > 250 Volts RMS @ sea level
The 73APT-100K Kelvin Series probe can be ordered with custom configurations including:
- Series resistors
- Custom bends
- Custom mounting shanks sizes and configuration
- SMA connectors
- Custom UT-047, Semi-rigid coaxial with BeCu core
- Radii and pitch (pitch is the distance between the two probe tips at the radius)
Please click on the photo to review the 73APT-100K PDF