# 2.2.4 Installation method ![](/files/-LvhZIpnaVMAoW6x-qaZ) ![](/files/-LvhZLCCkRW5wXdPACbp) The probe should be installed on the side of the pipe in order to avoid cavities produced by gases accumulated at the top of the pipe that affect the transmission and reception of ultrasonic signals. If the probe cannot be installed on the side, it is important to ensure that the pipe is filled with fluid at all times. Any gap between the probe and the tube walls will result in substantial attenuation of signal intensity, seriously affecting signal strength and quality. Therefore, a coupling agent must be applied between the head of the probe and the tube wall during installation to ensure that no air bubbles remain between the probe and the tube wall. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.lorric.com/qr/fu-tx310-ultrasonic-flowmeter-manual-en-v2/2-installation-method/2.2-ultrasonic-probe/2.2.4-installation-method.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.