ETG 6900 a Complete Line of Gas analyzer Tunable Diode Laser based for Detection of NH3 – CH4 – HCl – CO2    

SOME APPLICATION                                                          MODEL  AVAILABLE

√ CH4 Landfill Monitoring                                              ETG 6901 A – CH4 ambient monitor

√ Biogas Detection                                                         ETG 6902 A -    CO2 ambient monitor     

√ Continuous Emission Monitoring                           ETG 6903 A -    NH3 ambient monitor

√ Fugitive Emissions                                                      ETG 6903 H -    NH3 Hot wet gas monitor

√ Natural Gas Detection                                                 ETG 6904 H -    HCl  Hot wet gas monitor

√ Agriculture                                                                     ETG 6900 X -    CH4/NH3 and CO2 (NDIR) and O2 (ECD)

√ Industrial Process Control

√ Selective Catalytic Reduction SCR/DeNOx

√ Climate Change Research

√ Environmental Research

√ Breath Analysis

THE ADVANTAGES

· Extremely high selectivity to the target gas

· Functional safety, continuous status reporting

· Long lifetime (10+ years)

· Fast response times

· Low power consumption possible

· Very low cost-of-ownership (no regular replacement and/or calibration)

· Low cost of the gas sensor through excellent scaling costs of the components

· 19”inch Rack Mounting

· User Friendly interface

· Data logging

· Expandable in a multipoint system

· Zero & Span Calibration

· Status sensor verification

THE TECHNOLOGY

ETG uses  technology-enhanced TDLS for gas detection, where a 0.1 nm narrow bandwidth diode laser beam scans across an absorption band of the target gas, performing a high-resolution near-infrared absorption measurement. Electronic lock-in technology allows separating the gas absorption information from electro-optical system information, leading to a detection method eliminating the need for a physical reference channel and offering continuous sensor status monitoring. Thus, ETG TDL 6900 series present a clear alternative to current sub-optimal detection solutions and combine precise, contact-less optical measurements with high target gas selectivity, calibration-free operation, low cost-of-ownership and easy operation.

The ETG 6900 series are ready-to-use devices for the measurement of gases such as NH3, HCl, CH4, CO2, (H2O). These lines of instrument are ready to use in the field of gas detection and monitoring in diverse industries. The high sensitivity and large dynamic range of the Tunable Diode Laser Spectrometry (TDLS) detection technology enables measurement from sub-ppm level to high percentage concentration without physical adaptation of the device.                                                                                                  

SPECIFICATIONS

Target Gas                          Lower Detection Limit                           Typical Measuring Range

NH3, (H2O) Ammonia ***

(Hot-wet measurement)             0.8 ppm                                          0 – 20, 50, 100, (500) ppm

HCl, (H2O) Hydrogen chloride ***

(Hot-wet measurement)             0.8 ppm                                          0 – 50, 100, (500) ppm

NH3 Ammonia                          0.4 ppm                                           0 – 100 (500) ppm

CH4 Methane                            0.4 ppm                                          0 – 100 (40'000) ppm

CO2 Carbon Dioxide                   4.0 ppm                                          0 – 1000 (300’000) ppm

* Other gases on request. ** Detection limits at constant system temperature, 20°C, 1013 hPa and 50 ± 1.5 % r.H. Detection limits may change where system temperature changes occur significantly faster than concentration changes, and/or where a difficult gas matrix is present. *** Detection limits degrade at higher temperatures due to spectroscopic reasons; e.g. NH3 at 190°C.

Accuracy                                       ± 2% full scale reading depending on integration stability (temperature &                                                                           pressure)

Precision                            gas dependent

Zero drift                            over 2 h period - within accuracy

Span drift                           over 8 h period - within accuracy

Max. error on temp.             comp. % of < 0.1 reading/°C

Linearity & Repeatability      included in the accuracy

Cross talk/interference         Gas matrix and application dependent

Displayed resolution             ppm 0.1 (negative values can also be displayed)

Refresh rate                         s 1 (integration time can be selected, max. 120 s) up to 2 s in case no target gas is                                                            present

T90 time                              s 2 (at gas flow rate of 3 L/min)

Ambient temp. compensat.    °C -10 … 65 (as narrow as possible, application defined)

Meas. gas max. humidity       % abs. H2O application dependent, needs calibration Input for external                                                                               parameter compensation pressure, temperature or matrix gas concentration                                                                     (optional customization)

Maximum measurement        mL / min 5’000 (1’000); std. calibration carried out at 3’000 gas flow                                                                               (Minimum)

Electrical supply                   Vac 220-230/115 50/60 Hz

Enclosure                             19”Rack HE 4 ( depth 500 mm)

Pneumatic connections          Swagelok 6 mm O.D.

Sample pump                       Internal

Analog Outputs                     4-20 mA (not isolated)                       

Ports                                    Ethernet

Monitor                                5.7”Resistive Touch Screen

Data logging                         by USB port