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Thermo Scientific Dionex ERS 500 Letter of Equivalency
The Thermo Scientific™ Dionex™ SRS™ 300 Self-Regenerating Suppressor has been discontinued. The Thermo Scientific™ Dionex™ ERS™ 500 Electrolytically Regenerated Suppressor is a direct replacement. The table below details the discontinued parts and their replacements.
Discontinued Dionex SRS 300 Suppressors
Equivalent Dionex ERS 500 Suppressors
Old P/N
Old Description
New P/N
New Description
064554
ASRS 300 (4 mm)
082540
AERS 500 (4 mm)
064555
ASRS 300 (2 mm)
082541
AERS 500 (2 mm)
064556
CSRS 300 (4 mm)
082542
CERS 500 (4 mm)
064557
CSRS 300 (2 mm)
082543
CERS 500 (2 mm)
The Dionex ERS 500 suppressors have the same fit, form and function as the Dionex SRS 300 suppressors; they have been designed and validated to directly address all the applications currently supported by the Dionex SRS 300 suppressors with the following exception:
• The Dionex ERS 500 suppressor does not support the chemical regeneration mode. The Thermo Scientific™ Dionex™ MMS™ 300 MicroMembrane Suppressor is recommended for chemical regeneration mode.
The Dionex ERS 500 suppressor design incorporates a number of design enhancements:
• Linear eluent channel flow.
• PEEK eluent and regenerant chamber construction.
• O-ring sealing mechanism.
• Optimized regenerant channel, eluent channel, and electrode profiles.
• Ion exchange resin packed eluent chamber.
• Reduced eluent flow path length.
• Serial regenerant flow.
The Dionex ERS 500 suppressor uses