Agilent/Keysight 85070E

The Keysight 85070E Dielectric Probe Kit measures complex permittivity of materials across broad frequency ranges, operating in conjunction with a Keysight network analyzer and specialized software. It determines intrinsic electromagnetic properties - dielectric constant (ε'), dielectric loss factor (ε''), loss tangent, and Cole-Cole parameters - correlating results to material characteristics including biomass, bulk density, chemical concentration, and bacterial content. The coaxial probe method enables non-destructive, real-time measurements on liquids, semi-solids, and flat-surfaced solids, serving research, development, quality assurance, and process monitoring in RF/microwave electronics, food, medical, and chemical industries.

Technical Specifications

• Frequency Range: 200 MHz to 50 GHz (configuration-dependent; certain probes rated to 20 GHz)


• Measurement Parameters: Complex permittivity; dielectric constant; dielectric loss factor; loss tangent; Cole-Cole representation


• Sensing Volume: 3.5 mm aperture provides enlarged sensing volume relative to alternative probes


• Accuracy: Performance dependent on material under test; typical accuracy measured at 23 ±3 °C, excluding probe contact and cable flexure effects


• Repeatability: For granular materials, repeatability contingent on density variation


• Temperature Operating Range: −40 °C to +200 °C

Key Features

• Probe Configurations:

Performance Probe (Option 050): High-temperature, high-frequency capability in slim design

High-Temperature Probe (Option 020): Rated −40 °C to +200 °C

Slim Form Probe (Option 030): Compact profile for small apertures in fermentation tanks and reaction chambers

Hermetic Construction: Glass-to-metal seal resists corrosive and abrasive chemicals

Sterilization: Autoclavable for food, medical, and chemical sector requirements

Connector Options: 3.5 mm male (standard configurations); 2.4 mm male (50 GHz coverage); adapters available (Type-N female to 3.5 mm male; 3.5 mm male to 2.4 mm female)

Typical Applications

• Quality assurance and process monitoring in food and beverage production


• Medical device and pharmaceutical development


• Chemical concentration and composition analysis


• RF and microwave material characterization


• Bacterial and biomass content assessment

Compatibility & Integration The 85070E integrates with Keysight network analyzers and companion measurement software for comprehensive dielectric characterization across the 200 MHz to 50 GHz spectrum.