Inline filters are installed directly in the mobile‑phase or sample fluid path to remove particulates before they reach sensitive components such as columns, detectors, and flow cells. This category includes inline filters with reusable PEEK housings and replaceable filter elements, designed to provide continuous system protection in HPLC, UHPLC, and LC‑MS workflows.
Inline filtration acts as a final safeguard within the chromatography system. Even when solvents and samples are pre‑filtered, particulates can still be introduced through injector wear, pump seal degradation, sample precipitation, or inline component shedding. Inline filters help capture these contaminants before they cause blockages or performance drift.
Purpose & Function
Inline filters are used to:
Remove particulates formed or introduced after solvent pickup
Protect columns from premature fouling
Reduce pressure spikes and flow instability
Extend pump seal, valve, and column life
Maintain consistent chromatographic performance
By addressing particulate contamination inside the system, inline filters help reduce unplanned downtime and maintenance events.
Design & Materials
The inline filters in this category feature:
Reusable, all‑PEEK housings for broad solvent compatibility
Replaceable filter elements, allowing economical long‑term use
Chemically inert wetted surfaces suitable for aqueous and organic solvents
Filter replacement restores performance without replacing the entire inline assembly.
Filter Element Options
Replaceable filter elements are available in different pore sizes to match application requirements:
2.0 µm filters for general particulate protection
0.5 µm filters for finer contamination control in sensitive systems
Element selection should consider solvent cleanliness, sample composition, and column particle size.
Installation & Use
Inline filters are typically installed:
Downstream of the pump
Upstream of the column (pre‑column position)
This placement ensures maximum protection against particulates generated within the system while preserving detector performance.
Performance Benefits
Acts as the last line of defense against particulate contamination
Reduces column and system component wear
Helps stabilize baselines by limiting particle‑related disturbances
Supports longer service intervals and improved uptime
Inline filtration complements, rather than replaces, inlet and membrane filtration.
