5320 ELCD | Electrolytic Conductivity Detector

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The Model 5320 Electrolytic Conductivity Detector (ELCD) excels in select detection of halogen-containing compounds, while also proving its flexibility by offering sulfur and nitrogen detection. 

  • Overview

    The Model 5320 is our third-generation Electrolytic Conductivity Detector. It combines three key components: a reactor assembly, cell-solvent assembly, and detector controller. Its principal mode of operation is the halogen mode (X), but sulfur (S) and nitrogen (N) modes are also available. Each detection mode kit contains all of the required materials (except the solvent) to operate the ELCD in a specified mode.

    The Electrolytic Conductivity Detector is designed for high sensitivity measurement of halogenated compounds. Interfacing an ELCD with a PID as tandem detectors are prescribed in USEPA methods 502.2 and 8021 for measuring chlorinated and aromatic volatile organic compounds (VOCs) in drinking water and wastewater samples. 

    The ELCD converts halogen compounds eluting from a GC column to an ionizable gas (HX) using reductive conditions in a high-temperature catalytic microreactor. Gaseous reaction products carried into the detector cell dissolve in a deionized solvent, which increases the electrolytic conductivity of the mixture. The detector amplifies this instantaneous change in conductivity, producing a signal proportional to the mass of halogen in the original compound.

    Electrolytic Conductivity Detector Capabilities:

    • Quick-change reactor design, disposable resin cartridge, and reliable solvent system
    • The analog-controlled reactor temperature and solvent flow
    • Detector base optimized for capillary columns
    • Solvent venting using GC timed-event relay
    • Direct interface with most GC makes and models
    • Direct interface to the OI Analytical Model 4430 PID without a transfer line; tandem design occupies only one detector port

    Principal Applications:

    • USEPA Methods (502.1, 502.2, 601, 608, 611, 8010, 8021)
    • VOCs • Pesticides • Halogenated Compounds
    • QA/QC • Petroleum Products
    • Process Control, Testing, and Analysis
    • Fluorinated and Chlorinated Contaminants in Process Streams

  • Specifications
    General Specifications  
    Detectable Mass  
    Maximum* 1 pg lindane
    Maximum 5 µg lindane
    Dynamic Range 5 x 106
    Selectivity Cl/HC > 106
    Cl/N > 105
    Cl/S > 105
    Reactor Temperature  
    Range 800 – 1,100 ˚C in 100 ˚C increments
    Stability ± 1 ˚C
    Solvent Flow Adjustable on the cell amplication board
    Solvent Flow Range 0-200 µL/min
    Solvent Vent Valve Controlled by GC timed-event relay
    Detector Output 0-1 V or 0-10V
    Operational Modes Halogen, Sulfur, Nitrogen
    Gas Requirements Hydrogen, Ultrahigh purity (99.999% or better)
    Power Requirements 90–260 VAC (±10%)
    47–63 Hz, 200 W
    Detector Controller  
    Weight 3.8 kg (8.4 lb)
    Dimensions 21.0 cm H x 12.7 cm W x 30.5 cm D
    (8.25” H x 5.0” W x 12” D)
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