The Keithley 8008 is a guarded test fixture for measuring volume and surface resistivities of solid materials. It delivers electrostatic shielding and insulation resistance measurements to 1 TΩ, supporting sample diameters from 64 mm to 102 mm and thicknesses to 3.2 mm. The fixture applies uniform 1-pound contact pressure on smooth, parallel samples and accommodates voltages to 1100 V. A hinged, light-tight cover with integrated lid switch activates the voltage disable input on compatible electrometers and Source Measure Units. The 8008 measures volume resistivity to 10^18 Ω-cm (0.1 cm thick samples) and surface resistivity to 10^17 Ω/square per ASTM procedures. Supplied with interlock cable, prototyping board, two input cables with 3-slot triax plugs, and 72 ferrite beads for custom DC test configurations.
## Technical Specifications
• Volume resistivity: up to 10^18 Ω-cm (0.1 cm thick samples)
• Surface resistivity: up to 10^17 Ω/square
• Maximum insulation resistance: 1 TΩ
• Maximum voltage: 1100 V
• Sample diameter: 64 mm to 102 mm
• Sample thickness: up to 3.2 mm
• Contact pressure: 1 pound (uniform, smooth parallel samples)
• Dimensions: 108 mm H × 165 mm W × 140 mm D
• Weight: 1.45 kg
• Operating temperature: –25 °C to +85 °C (70% RH to 35 °C)
• Storage temperature: –25 °C to +85 °C
## Key Features
• Guarded test fixture design with electrostatic shielding
• Hinged cover for light-tight, shielded measurements
• Lid switch for automated voltage disable control
• 72 ferrite beads included for decoupling and active device testing
## Compatibility & Integration
Direct integration with Keithley Model 487 electrometers, Models 236, 237, and 238 Source Measure Units, and 6517A/6517B Electrometer/High Resistance Meters. Supplied with necessary cables and triax connectors.
