AA Ultrasonic

AA Ultrasonic, PD Sensor, Partial Discharge SensorThe AA Ultrasonic acoustic probe is designed for use on air insulated terminations where a clear sound path between the electrically stressed insulation and the probe is present. The sensor is extremely sensitive and can detect activity below 10pC. The probe has a magnetic base to allow coupling to steel enclosures and a swivel head as so the detecting sensor can be aimed directly at the HV point. Corona in air and surface tracking can seriously damage high voltage insulating surfaces in a way that will ultimately lead to flashover and complete failure of the insulator. This discharge activity creates acoustic emission that can be detected using a high frequency sensor. The magnitude of the acoustic emission is indicative of the degree and severity of the discharge activity.

Technical Specification AA Ultrasonic PD Sensor

Frequency response 40kHz
Receiving Sensitivity -65dB min at 40KHz (0dB = 1 volt/µbar RMS SPL)
Sensor head swivel 360 degrees
Dimensions 71 x 37 x 39 mm
Power Requirements 12VDC, up to 150mA
Output Connector BNC Female
Weight 0.05kg
Coupling Magnetic


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AA Ultrasonic PD Sensor Product Specification