• FID detects hydrocarbons and then the DELCD determines which are halogenated
  • No electrolytes needed for the DELCD
  • High and low sensitivity modes
  • Detects to low ppm range
  • Includes spare detector cell

The FID/DELCD detector is one of the most useful GC detectors because it allows the operator to reliably identify FID peaks as halogenated or not. The DELCD actually measures the ClO2 present in the FID exhaust gas. Because the FID combusts the sample upstream of the DELCD, all hydrocarbons are converted to CO2 and H20 prior to the DELCD, completely preventing large hydrocarbon peaks from contaminating the DELCD.

The DELCD operates at close to 1000°C and can tolerate the water-saturated FID effluent and measure the chlorine or bromine content simultaneously with the FID measurement of the hydrocarbon content. This is especially beneficial for measuring chlorinated VOCs under a solvent peak as shown in the example chromatogram above, pesticides or in measuring PCB peaks obscured under large amounts of diesel fuel.

While approximately 100 times less sensitive than an ECD detector, the DELCD is much more selective than the ECD which can eliminate interferences which would complicate an ECD analysis. Sample preparation which might be required for ECD work is not required for the DELCD because of its total selectivity and because the FID pre-combusts any contaminants. The FID/DELCD is supplied with dual amplifiers for two simultaneous chromatograms and comes with a spare DELCD detector assembly.


Up to six detectors can be mounted on the 8610C GC mainframe.



Fourteen detector combinations are available for mounting on the SRI Models 8610C and 310 GC mainframes.You can also upgrade your current GC or add more analytical power to your lab with these detectors as Stand-Alone units on the Model 110 detector chassis.

Up to six detectors may be mounted along the right hand side of the 8610C GC's column oven and used simultaneously (although some rare combinations of detectors may conflict because of space limitations). Each detector is equipped with a thermostatted heater block for temperature stability, electronic pressure controlled (EPC) support gases, such as hydrogen and air for the FID, and internal amplifier electronics. Select your detector type(s) based on your particular measurement application, detection limit required, matrix interferences, and/or regulatory guidelines.

All detectors require factory installation.

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