Micro-Varicon Dielectric/Conductivity Sensor

Micro-Varicon Conductivity Sensor

Figure 1.
Micro-Varicon Dielectric/Conductivity Sensor


The Micro-Varicon sensor is a miniature, thin, flexible dielectric sensor designed for cost-sensitive use where space is limited. The electrode array is patterned on a polyimide substrate, and the Micro-Varicon sensor can be supplied with or without Teflon insulated leads.

The Micro-Varicon sensor head is 0.32” x 0.32” (8.0 mm x 8.0 mm) square and only 0.004” (100 um) thick. The tin-plated electrodes have 0.004” (100 um) widths and spaces. The Micro-Varicon sensor can measure the dielectric/conductive properties of materials within approximately 0.004” (100 um) of the electrode surface.

The Micro-Varicon sensor is suitable for high pressure applications and is ideal for measuring the dielectric properties and cure state of epoxies, bulk molding compound (BMC), sheet molding compound (SMC), silicones, thermosets, urethanes, RIM and composite materials. When used without leads, the sensor will tolerate temperatures up to 375 degrees C. When supplied with leads, the sensor will operate up to 200 degrees C.


Length, overall : 0.32 ” (8.0 mm)
Width, sensor head : 0.32” (8.0 mm)
Thickness : 0.004” (100 um)
Width, electrode : 0.004” (100 um)
Spacing, electrode : 0.004” (100 mm)

Substrate : Polyimide
Electrodes : Copper with bright tin flash
Lead Insulation: Teflon

Temperature, maximum : 375 Degrees C (700 Degrees F) without leads
Temperature, maximum : 200 Degrees C (392 Degrees F) with supplied leads

Sensor Parameters:
Configuration A (mid sensitivity) A/D Ratio: 80cm - Base Cap: ~25 pF
Configuration B (low sensitivity) A/D Ratio: 8cm - Base Cap: ~3 pF
* Actual value may vary

Temperature sensor : None