---
title: "Phoenix FD Test operator"
canonical: "https://documentation.chaos.com/space/PHX4MAX/125083397/Phoenix%20FD%20Test%20operator"
format: markdown
---
This page provides information on the Phoenix FD Test operator for Particle Flow.

## **Overview**

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This Particle Flow operator checks the fluid in the particle's position. If the value of the selected channel is above/below a given threshold, it redirects the particle into a different event.


## **Parameters**

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