The E-100 Electric Field Sensor is a passive accessory that plugs into your MSI-95 gaussmeter to measure the electric field strength. Calibration is for vertical polarization at 60 Hz. Accuracy is around +/-20% since an E-field measurement is strongly affected by the surroundings (earth, measurer's body, metal objects, etc).
The E-100 is most accurate when used with a METEX M3800 multimeter (supplied with the MSI-95 Gaussmeter), since it was designed with that meter, which functions as the bottom half of the antenna.
$40.00