LT-4203 Parallel Plate Test Cell

(shown with faceplate removed)

Parallel Plate Test Cell


The LT-4203 Parallel Plate Test Cell is designed for measuring the AC loss characteristics and permittivity of solid laminates and panels per ASTM Standard D150-98, and implements the guarded electrode (three terminal) measurement preferred as the referee method.

The standard sense electrode is 6.0 cm in diameter and the electrode separation may be adjusted to accommodate various sample thicknesses. A removable micrometer head permits measurement of electrode separation before testing. The 1.0 cm wide guard electrode eliminates fringing electric fields around the sense electrode for accurate calculation of test cell capacitance. Both electrodes are surrounded by a grounded frame which acts as a Faraday cage to reduce pickup of external electrical noise.

Maximum operating temperature of the LT-4203 is 150 °C, allowing measurement of dielectric properties at elevated temperatures. Modification of the LT- 4203 for operation up to 200 °C is available upon request.

The LT-4203 Parallel Plate Test Cell may be used with either the Lambient Technologies LT-451 Dielectric Cure Monitor or generic LCR meters. When used with the LT-4203, the LT-451 can test samples with thicknesses between 0.025 cm and 0.50 cm with optimum accuracy.


Dimensions: Overall (length x width x height) : 11.2 cm x 12.4 cm x 20.3 cm (4.4” x 4.9” x 8.0”)
Diameter, excitation electrode : 8.00 cm
Diameter, sense electrode : 6.00 cm (Area = 28.27 cm2)
Width, guard electrode : 1.00 cm

Electrodes : Stainless steel
Insulator : Teflon
Body : Aluminum

Temperature, maximum : 150 °C (302 °F)*
*Modification for operation to 200 °C (392 °F) available upon request

Excitation electrode : BNC**
Sense electrode : Triax**
**Electrode connections may be modified upon request

Recommended sample dimensions : 8.0 cm x 8.0 cm to 9.0 cm x 9.0 cm (maximum)
Optimum sample thickness : 0.025 cm to 0.50 cm

Test Cell Parameters:
A/D ratio : 28.27 cm2 / sample thickness in cm
Base (parasitic) capacitance : ~15 pF (actual value may vary)
Micrometer Attachment : Removable for use at elevated temperatures
Accuracy : 0.03 mm (0.001”)
Resolution : 0.01 mm (0.0005”)

Features :
On/Off switch
Adjustable ZERO reference
Absolute/Incremental readings
Direct mm-in conversion