Using The Ultrasonic Contact Probe - EA Technology UltraTEV Plus2 Operating Manual

EA Technology UltraTEV Plus

8.3.5 Using the Ultrasonic Contact Probe

The Ultrasonic Contact Probe should be used if there is not a direct path between the PD
source and instrument sensor as shown in the second image below. However, it must not
be used if the tank containing the expected PD source is separated with another layer
(shown in the third image). In cases where there is a direct air path between the source of
PD and the instrument, an airborne sensor should be used as shown in the first image
below. Due to the physics of ultrasound, in most cases using an airborne sensor may offer
better sensitivity than that obtained using the Ultrasonic Contact Probe.
Surface PD
CP
1
1) Ultrasonic signal can propagate through the air path. The Ultrasonic Contact
Probe can be used; however, better results may be obtained using the airborne
sensor.
2) No available air gaps - using an Ultrasonic Contact Probe is the best practice.
3) There is no access to the tank containing PD source, neither the airborne sensor
nor the Ultrasonic Contact Probe will provide a valid reading.
Contact
Operating Manual
2
Surface PD
2
Cable Socket
Aluminium Body
Sensor Head (stainless steel)
Asset surface or measurement point
(Where the Ultrasonic Contact Probe is attached)
Page 54 of 66
Surface PD
CP
3
2388L015
CP