---
title: "Discussion on \"UV Reactor Hydraulic Design and Short-Circuiting: Why Average Residence Time Is Not Dose\" | Hashnode"
description: "Discussion on \"UV Reactor Hydraulic Design and Short-Circuiting: Why Average Residence Time Is Not Dose\". Buyers often size a UV reactor from flow rate and a brochure “dose.” Then the first validation run shows uneven kill. The gap is usually hydraulics, not a weak lamp.\nAverage residence time is a volume"
url: "https://hashnode.com/posts/uv-reactor-hydraulic-design-and-short-circuiting-why-average-residence-time-is-not-dose/6aea14908b314abf5435a5f1"
---

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Discussion

# [UV Reactor Hydraulic Design and Short-Circuiting: Why Average Residence Time Is Not Dose](https://yoyouv.hashnode.dev/uv-reactor-hydraulic-design-and-short-circuiting-why-average-residence-time-is-not-dose?utm_source=hashnode&utm_medium=feed)

Buyers often size a UV reactor from flow rate and a brochure “dose.” Then the first validation run shows uneven kill. The gap is usually hydraulics, not a weak lamp. Average residence time is a volume

Nov 3 · 7 min read · yoyouv.hashnode.dev  
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## Written by

[Kevin Pan](https://hashnode.com/@yoyouv)

@yoyouv · Shenzhen

  
[View profile](https://hashnode.com/@yoyouv)

UV LED Water Treatment/UV LED modules | Embedded Control | OEM/ODM

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