Idex Inline Filters

IDEX Inline MicroFilters and Inline Filters

IDEX Inline MicroFilters and Inline Filters provide dependable particulate protection for HPLC and low-pressure fluidic systems by capturing contaminants originating from mobile phases, samples, pump seals, or injection valve wear. By removing particles before they reach sensitive components, these inline filters help prevent clogging, stabilize system pressure, and extend column life.

IDEX Inline MicroFilters are available in 100% biocompatible PEEK and feature an ultra-low 240 nL void volume, making them ideal for microbore and capillary applications. Two connection options are offered: direct connection for 1/32" OD tubing, or compatibility with MicroTight® tubing sleeves for 70–520 μm OD capillary tubing—providing flexible integration into compact flow paths.

Standard IDEX Inline Filters are engineered for placement directly along the flow path between the pump and injection valve or autosampler. Offered in multiple porosities, these filters allow users to tailor particulate retention to their specific application while maintaining reliable flow performance across analytical systems.

PART NO DESCRIPTION POROSITY
FOR TUBING
THREADS
SWEPT VOLUME
PRESSURE RATING
INLINE MICROFILTERS
M-520 Inline MicroFilter Assy, PEEK Frit 0.5 µm MicroTight Tubing Sleeve MicroTight Tubing Sleeve 240 nL 4,000 PSI (276 bar)
M-525 Inline MicroFilter Assy, PEEK Frit 0.5 µm 1/32" OD 1/32" OD 240 nL 4,000 PSI (276 bar)
REPLACEMENT INLINE MICROFILTER END-FITTINGS
M-120 End-Fittings, Black, with PEEK Frit 0.5 µm MicroTight Tubing Sleeve MicroTight Tubing Sleeve 216 nL N/A
M-140 End-Fittings, Natural, with PEEK Frit 0.5 µm 1/32" OD 1/32" OD 216 nL N/A
INLINE SOLVENT FILTERS
A-313 Solvent Filter Assembly 20 µm 1/16" OD 10-32 Coned 12.3 µL 6,000 PSI (414 bar)
A-314 Solvent Filter Assembly 2 µm 1/16" OD 10-32 Coned 4 µL 6,000 PSI (414 bar)
A-100 Replacement Frits, SS 2 µm N/A — 1.4 µL N/A
A-224 Replacement Frits, SS 20 µm N/A — 9.7 µL N/A
BIOCOMPATIBLE INLINE FILTERS
A-430 Biocompatible Filter Assy 2 µm N/A 10-32 Coned 7.1 µL 6,000 PSI (414 bar)
A-431 Biocompatible Filter Assy 0.5 µm N/A 10-32 Coned 5.9 µL 6,000 PSI (414 bar)
A-428x PEEK Filter End Fittings, Black PEEK body 0.5 µm N/A 10-32 Coned 5.7 µL N/A
A-429x PEEK Filter End Fittings, Natural PEEK body 2 µm N/A 10-32 Coned 6.9 µL N/A
SEMI-PREP INLINE FILTERS
A-330 Semi-Prep Filter Assy 10 µm N/A 10-32 Coned 223 µL 7,500 PSI (517 bar)
A-360 Semi-Prep Filter Assy 10 µm N/A 5/16-24 Flat Btm 235 µL 3,500 PSI (207 bar)
A-331 Stainless Steel Frits, Natural ETFE ring 10 µm N/A N/A 142 µL N/A
A-332 Stainless Steel Frits, Natural ETFE ring 2 µm N/A N/A 122 µL N/A
A-337 Stainless Steel Frits, Natural ETFE ring 20 µm N/A N/A 152 µL N/A
BIOCOMPATIBLE SEMI-PREP INLINE FILTERS
A-410 Biocompatible Filter Assy 2 µm N/A 10-32 Coned 89 µL 6,000 PSI (414 bar)
A-411 Biocompatible Filter Assy 10 µm N/A 10-32 Coned 103 µL 6,000 PSI (414 bar)
A-510 Biocompatible Filter Assy 5 µm N/A 5/16-24 Flat Btm 89 µL 500 PSI (34 bar)
OC-802 PEEK Frit, Green PCTFE ring 2 µm N/A N/A 46 µL N/A
OC-803 PEEK Frit, Natural PCTFE ring 10 µm N/A N/A 57 µL N/A
OC-805 PEEK Frit, Natural PCTFE ring 5 µm N/A N/A 50 µL N/A
Key Definitions â–¶
Frequently Asked Questions â–¶
What do IDEX inline filters protect?
IDEX inline filters capture particulates originating from mobile phases, samples, pump seals, and injection valves—helping prevent clogging of columns and sensitive downstream components.
What is the difference between Inline MicroFilters and standard Inline Filters?
Inline MicroFilters feature ultra-low void volume (240 nL) and are optimized for microbore and capillary applications, while standard Inline Filters are designed for broader inline particulate protection along the main LC flow path.
Are the Inline MicroFilters biocompatible?
Yes. Inline MicroFilters are available in 100% PEEK, providing excellent chemical resistance and biocompatibility for analytical and life science applications.
What tubing sizes are supported?
Inline MicroFilters support direct connection to 1/32" OD tubing or can be used with MicroTight® tubing sleeves for 70–520 μm OD capillary tubing, offering flexible integration into compact flow paths.
Where should I place an inline filter in my system?
Inline filters are ideally positioned between the pump and injection valve or autosampler to intercept particulates before they reach columns or detectors.
Are multiple filter porosities available?
Yes. IDEX Inline Filters are offered in a variety of porosities, allowing you to select the appropriate particle retention level for your specific application.