ADS Environmental Services Portable FlowShark Pulse QR 775006 A2 - Manual (Page 171)

7-6 ADS Portable FlowShark Pulse Manual
Air-Ultrasonic Depth Sensor
These sensors are designed to measure the range between the sensor and the flow
surface without contacting the flow. Therefore, if the sensor becomes submerged,
check for debris on the sensor face or crystals. If debris or residue exists, clean the
sensor with water and a cloth or soft brush after the flow subsides to ensure the signal
has free access to the flow surface.
Do not loosen or remove the sensor from the ground plate or cable
gland. This will cause leakage, resulting in measurement error
and/or permanent damage to the sensor.
Never remove any part from the air-ultrasonic depth sensor, other
than the mounting plate on the bottom.