---
title: "What types of inhibitors can the Express Inhibitor Test detect?"
description: "The test can detect all Fernox Protectors, as well as other molybdate-based inhibitors used in central heating systems."
url: https://help.fernox.app/en/articles/108-what-types-of-inhibitors-can-the-express-inhibitor-test-detect
collection: "Advice"
updated: 2026-10-05
language: en
alternates: [es, de, nl-be, nl, fr, fr-be, cs, sv, ro, pl, tr, sk]
---

# What types of inhibitors can the Express Inhibitor Test detect?

The test can detect all Fernox Protectors, as well as other molybdate-based inhibitors used in central heating systems.