Lambient

Mini-Varicon Dielectric/Conductivity Sensor

Mini-Varicon Dielectric Sensor

Figure 1.
Mini-Varicon Dielectric/Conductivity Sensor

DESCRIPTION

The Mini-Varicon sensor is a thin, flexible dielectric sensor designed for costsensitive use with presses, molds, bulk materials or laminates. Patterned on a polyimide substrate, the electrode array is designed to allow a choice of high or low sensitivity, selected by either using the whole sensor or cutting off a portion of the array at a designated line. The Mini-Varicon sensor can be supplied without leads, or with custom length
Teflon-insulated leads attached.

The Mini-Varicon sensor head is 1.5” (4.0 cm) long and only 0.004” (100 um) thick. The tin-plated electrodes have 0.004” (100 um) widths and spaces. The Mini- Varicon sensor can measure the dielectric/conductive properties of materials within approximately 0.004” (100 um) of the electrode surface.

The Mini-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 °C. When supplied with leads, the sensor will operate up to 200 °C.

SPECIFICATIONS

Dimensions:
Length, overall : 1.6 ” (4 cm)
Width, sensor head : 0.75” (1.9 cm)
Thickness : 0.004” (100 um)
Width, electrode : 0.004” (100 um)
Spacing, electrode : 0.004” (100 mm)

Composition:
Substrate : Polyimide
Electrodes : Copper with gold or bright tin flash.

Operational:
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