The Gasmet™ Portable Sampling System has been designed to enable stack measurements with the portable DX-4000 analyser. It is widely used for example by stack testers who do comparison measurements. The principle of operation is the same as in the fixed Gasmet™ Sampling System i.e. the sample gas is not dried or diluted in any way – only particles such as dust as are filtered out. As an option, the sampling system can now also be supplied with a built-in zirconia cell for oxygen measurements. The portable sampling system is complemented by a portable heated probe.

Multicomponent FTIR Gas Analyzer

GASMET ON-SITE SERIES includes portable multicomponent gas analyzers for demanding applications. The GASMET Dx-4000 incorporates a Fourier Transform Infrared, FTIR spectrometer, a temperature controlled sample cell, and signal processing electronics. The analyzer offers versatility and high performance for all users.

The GASMET Dx-4000 is designed for on site measurements at low concentrations. It is an ideal tool to measure trace concentrations of pollutants in wet,  corrosive gas streams. The sample cell can be heated up to 180 °C. Sample cell absorption path length is selected according to the application.

The GASMET Dx-4000 allows simple calibration using only single component calibration gases. The user can easily configure the analyzer for a new set of compounds.

General parameters

Measuring principle: Fourier Transform Infrared, FTIR

Performance: Simultaneous analysis of up to 50 gas compounds

Response time, T90: Typically < 120 s, depending on the gas flow and measurement time

Operating temperature: Short term 20 ± 20°C long term 15 - 25°C non condensing

Storage temperature: -20 - 60°C, non condensing

Power supply: 100-115 or 230 V / 50 -60 Hz

Power consumption: 300 W

Spectrometer

Resolution: 8 cm-1 or 4 cm-1

Scan frequency: 10 scans / s

Detector: Peltier cooled MCT

Source: SiC, 1550 K

Beamsplitter: ZnSe

Window material: ZnSe

Wavenumber range: 900 - 4 200 cm-1

Sample Cell

Structure: Multi-pass, fixed path length 5.0 m

Material: 100 % Rhodium coated aluminium

Mirrors: Fixed, protected gold coating

Volume: 0.4 l

Connectors: Inlet Swagelok 6 mm Outlet Swagelok 8 mm

Gaskets: Viton® O-rings

Temperature: 180 °C, maximum

Window material: BaF2

Measuring parameters

Zero point calibration: 24 hours, calibration with nitrogen (4.0 or higher N2 recommended)

Zero point drift: < 2 % of measuring range per zero point calibration interval

Sensitivity drift: none

Linearity deviation: < 2 % of measuring range

Temperature drifts: < 2 % of measuring range per 10 K temperature change

Pressure influence: 1 % change of measuring value for 1 % sample pressure change. Ambient pressure changes measured and compensated

Electrical Connectors:

Digital Interface: 9-pole D-Connector for RS-232

Analyzer is connected to an external computer via RS-232C cable. The external computer controls the GASMET.

Remote control connection for Portable sampling unit

Analysis Software (for external PC)

Operating system: Windows XP

Analysis software: CALCMET for Windows

Options

Sample Cell: Multi-pass, fixed path length 2.5 m or 9.8 m

Analog Signals (ext PC): PCMCIA card for 8 analog inputs

Sample cell gaskets: Teflon® coated Viton® or Kalrez®

Power supply: 12 VDC (Replace remote control for portable Sampling Unit, only for 50 °C models)

Power supply cables: 12V cables with battery clips or cigarette lighter connector

Trolley: Wheeled cart for the analyzer and laptop computer

Enclosure

Material: Aluminium

Dimensions (mm): 390 * 445 * 164

Weight: 13.9 kg

CE - Label: According to EMI guideline 89/336/EC