*Patent pending

Compact and low cost chromatography plasma

discharge detector

Compact yet powerful, this downsize and low cost detector solution which is based on our Enhanced Plasma Discharge (Epd) technology*, is a perfect example of our Scalable Building Block concept. Offering the Cubed  (single wavelength) with emission and tracer measurement mode, it is the perfect detector solution for process GC integrators or laboratory users.

Unique features

Based on our Enhanced Plasma Discharge (Epd) technology*

Replaces FID, DID, ECD, TCD, PDID, FPD

Emission or Tracer mode

Simple and easy integration into any lab or process GC

Exceeds the traditional Plasma Emission Detector (PED)

ppb to % measurement range

Typical application capabilities

The Cubed is configured and tailored for your specific application for optimal results. Here are some example of its capabilities for some of these applications.

Permanent gases

Example of N2 analysis in electronics gases with the Cubed

Molecules

N2: 227 ppb

Mode

Emission selective

Detector pressure

Ambient

Carrier

Argon

Sample loop

5 ML

Column

8 ft x 1/8" o.d. SS MS 5A

GC method

Direct injection

See the application sheet

on permanent gases analysis

Replace FID - Light hydrocarbon analysis

CH4 and NMHC(Non-Methane hydrocarbons) in O2 or AIR with the Cubed

Molecules

CH4: 1,7 ppm

NMHC: 2,7 ppm

Column 2

8' 1/8 Ms 5A 60/80

Carrier

O2 or AIR

Column 1

3' 1/8 Haye sep D 100/120

See the application sheet

on light hydrocarbons analysis

See the application sheet

on crude argon analysis

Molecules

CO: 1,7 ppm

CH4: 2,7 ppm

CO2: 4,8 ppm

C2H2: 2.2 ppm

C2H4:3,4 ppm

C2H6:2,6 ppm

C3H8: 2,3 ppm

Column 

6' 1/8 MS 5A 60/80

GC method

Injection

Column 2

10' 1/8 Haye Sep D100/120

Doping Gas

H2O

Mode

Tracer

See the application sheet

on crude argon analysis

Specifications

Carrier gas

Ar, He, N2, O2, H2 and CO2 

I/O interfaces 

RS-485

Analog output

Power supply

10 watts

Carrier gas flow

1 mL/min to

100 mL/min

Operation outlet pressure

Atmospheric

or

vacuum

Voltage

24 V

Operating temperature

5°C to 50°C

Gas connections

1/16"

Dimensions

82 x 82 x 121 mm

(3,23 x 3,23 x 4,76 in)

So much versatility in a small Cubed

True to our philosophy and to our Building Block concept, we have designed the Cubed  for it to be easy to use and easily configurable for the needs and applications of our clients.

 

With this thinking, we strongly believe that we can make gas analysis easier and the Cubed is a quantum leap towards this goal.

Can be operated with 

Argon, Helium, Nitrogen, Oxygen, Hydrogen and CO2 carrier

Can be operated on

Emission or Tracer

mode

Digital or analog

signal interface

Plug and Play

philosophy

The Cubed  can be interfaced and customized to fit with any GC model, configuration and software.

Enhanced Plasma Discharge (Epd) technology*

The versatility and the precision of the Cubed can be achieved because of our unique Epd technology*. This technology, which surpasses any other plasma emission technology available in the industry, is characterised by two main features. 

Stabilising/focusing electrodes*

Resolves plasma source instability (quenching) and hence signal to noise improvement at low concentration.

The electron injection electrodes*

Improves ionisation efficiency with molecular, mix gases backgrounds and impurities (mostly electronegative ones).

Measurement modes

The emission mode allows you to do two types of measurement:

Selective Emission measurement

On this mode, the detector is set to measure the light emitted by a molecule or a chemical group at a specific wavelength. 

  • High molecule selectivity

  • Low cross-interference

  • Better signal to noise ratio (ppt sensitivity)

  • Spectroscopic separation of two co-eluting molecules

Universal Emission measurement

For simple applications where a limit of detection in the region of 50 ppb is sufficient, the universal emission mode is a great alternative

  • Monitor a broad variety of molecule emissions with a single optical module

  • Reduce complexity of the detector

  • Reduce system cost

Tracer measurement

The tracer mode is a variant of the doping mode and exploits the reactor properties of the plasma. In this mode, the doping gas is used as a tracer gas. 

The Cubed architecture

  1. Optical measuring module with onboard DSP

  2. Plasma Discharge Cell

  3. Enhanced Plasma Discharge generator module

  4. Plasma discharge electrodes

  5. Focusing/stabilising electrodes

  6. Electron injection electrodes

  7. Permeation doping module

  8. Sub-atmospheric pump module

1) Optical measuring module with onboard Digital Signal Processing (DSP)

The Cubedcompactness has been achieved by integrating the digital signal processing (DSP) unit inside the optical measuring module. Optimise the signal processing and consequently the performance for each peak by adjusting the pre-amplification, gain and digital filters. The optical filter is user configurable to be selective for a specific molecule/chemical group or as a universal measurement device. An optional second optical measuring module can be added to the Cubed when two different wavelengths are required.

Features 

  • Measurement channel

  • 100 Hz sampling rate

  • Analog gain and offset adjustment

  • High resolution chromatogram analog output

  • Advanced signal processing 

    • Signal filtering (window filtering, moving average)​

    • Peak remodeling algorithm*

2) Plasma Discharge Cell

The plasma discharge cell, which is made of premium quartz material and treated with a proprietary process to eliminate fluorescence, contains the plasma discharge and provides the optical measurement windoes.

4) Plasma discharge electrodes

The plasma discharge electrodes provide an efficient power coupling to the discharge gas, normally the carrier gas.

6) Electron injection electrodes

The Electron Injection electrodes provide a supply of free electrons to the plasma zone improving the ionisation process mostly with electro negatives gas or impurities. This current is also control by plasma controller and transparent to the users.

3) Enhanced Plasma Discharge generator module

This module is the core of our Enhanced Plasma Discharge technology*. It maintains, stabilises and focuses the plasma discharge and controls the different measurement modes.

5) Focusing/stabilising electrodes

A focusing/stabilising and a modulated field is applied to the plasma discharge with these electrodes. This field, which is controlled by the plasma generator module, resolves plasma source instability, hence also improves signal to noise at low concentration.

7) Permeation doping module

There are several situations where the addition of a compound to the carrier gas will improve peak shape or make the detector working in the so call tracer mode. This mode allows to measure several impurities by using only one emission wavelength. Useful for specific hydrocarbons and VOCs measurement. Could also be used for permanent gases measurement.

8) Sub-atmospheric pump module

In some specific cases, using the detector below the atmospheric pressure will improve peak shape , by virtually controlling the internal volume of the detector, and will also reduce baseline signal and increase emission. Also it ease the process of maintaining a stable discharge of specific gas mixtures.

Crude argon

Example of N2 in Argon analysis with the Cubed

Molecules

N2: 431 ppm

GC method

Heartcut

Column 2

6' 1/8 MS 5A 60/80

Carrier

Argon

Mode

Emission selective

Detector pressure

Ambient

Column 1

6' 1/8 MS 5A 60/80

Sample loop

5 μL