15 December 2025

Device Information
Model: Signatone Pro4 Resistivity System

Technical Specifications

Measurement Capabilities:

• Surface and bulk resistivity measurements

• Manual mapping

• High accuracy at 1% level

• Measurement Range: 10 µΩ/□ – 100 MΩ/□ (with Keithley 2450)

• Voltage Range: 20 mV – 200 V (with Keithley 2450)

• Current Range: 10 nA – 1 A (with Keithley 2450)

Probe Configuration:
The system includes two probe heads:

Head 1:

• Tip Spacing: 0.0625 in

• Applied Pressure: 85 g

• Probe Material: Osmium

• Tip Diameter: 0.005 in

Head 2:

• Tip Spacing: 0.0625 in

• Applied Pressure: 180 g

• Probe Material: Osmium

• Tip Diameter: 0.005 in