TDLS Laser microgas analyzer
Principle
EDK series products adopt enhanced TDLS technology with a scanning wavelength of 0,1nm to avoid cross-interference of the absorption wavelength of the target gas，Also known as the "fingerprint spectrum," it enables high-resolution near-infrared absorption measurements. Electronic phase-locking technology can extract and separate the absorption information of the measured gas from the photoelectric information. This detection method does not need a physical reference pool and provides continuous sensor state monitoring. EDK TDL6900 series products provide high precision and low detection limit solutions. The instrument has the characteristics of non-contact measurement, free calibration, low cost and easy operation with high accuracy and selectivity for the gas under test.
EDK TDL6900 series products can easily measure some trace gases that are not easy to measure by conventional methods, such as NH3, CH4, CO2, H2O, etc Monitoring and analysis of these gases are critical in many industrial applications. High sensitivity and wide dynamic range are essential features of tunable semiconductor laser spectroscopy (TDLS) technology for the measurement of sub-ppm to % of gases
Typical application | Series products |
CH4 methane landfill | EDK 6901 A – Atmospheric trace CH4 monitoring |
Biogas analysis and monitoring | EDK 6902 A - Atmospheric trace CO2 monitoring |
Continuous monitoring of pollutant emissions | EDK 6903 A - Atmospheric trace NH3 monitoring |
Escape emissions | EDK 6903 H - Trace NH3 monitoring in high temperature and humidity |
Nature gas monitoring and analysis | EDK 6904 H- Trace HCl monitoring in high temperature and humidity |
Agriculture field | EDK 6900 X - CH4/NH3、 CO2 (NDIR)、O2 (ECD) |
Industrial process control |
|
The flue gas denitration SCR/DeNOx |
|
Climate change research |
|
Environmental research |
|
Breathing analysis |
|
Advantages
Ultra high sensitivity
Functional safety, continuous status report
Long life (+10 years)
Quick response
Low power consumption
Low-cost solution (no consumables, spare parts, no need to calibrate)
Excellent low-cost components determine low-cost sensors
19 "mounting bracket
Friendly UI
Data storage and logging
Scalable multipoint sampling system
Zero & wide range calibration
Sensor status self-test
specification
gas | Limited detection | Typical range |
NH3, (H2O)ammonia*** |
condition with high temperature and high humidity | 0.8 ppm | 0 – 20, 50, 100, (500) ppm |
HCl, (H2O) Hydrogen chloride *** |
condition with high temperature and high humidity | 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 customizable |
Limited detection is under the condition of constant temperature pressure humidity (20°C, 1013 hPa、50 ± 1.5 % r.H.) A sudden change in system temperature causes a faster change in the detection limit than a change in concentration. Based on the spectrum, detection limit, as the high temperature increases and decreases, such as NH3 @ 190 ° C. |
Accuracy | ± 2%FS according to integral stability (temperature & pressure) |
precision | According to gases |
Zero drift | More than two hours per cycle -- within accuracy |
Span drift | More than eight hours per cycle -- within accuracy |
Maximum temperature error | < 0.1 reading/°C |
Linearity/repeatability | < ± 2% |
Cross interference | According to gas matrix or actual condition |
Resolution | 0.1 ppm |
Refresh rate | 1s (settable maximum120 s) |
T90 time | 2s (@flow rate3 L/min) |
Ambient temperature compensation | -10 ~65°C (The smallest possible temperature fluctuation) |
Maximum sample gas humidity | % absolute humidity, according to the operation condition, need to input calibration, through expansion compensation pressure, temperature or mixed gas concentration, customizable |
Maximum sample volume | 5(1)L/ min; 3L/min in calibration |
Power supply | VAC220-230/115 50/60 Hz |
Shell | 19’’ Standard rack installation (depth: 500mm) |
Explosion-proof grade | ExdII CT4, ExdII CT5,(customizable) |
Gas connection | Swagelok Φ6 mm |
Measuring method | In situ extraction |
Sampling pump | Internal |
Analog output | 4-20 mA Current loop (no isolation) |
port | Ethernet |
Display | 5.7” touch screen |
Data storage | Via USB port |
Based on infrared photoacoustic spectroscopy technology, DKG-ONE Photoacoustic Gas Analyzer combines the unique light source and detector which is a patented enhanced cantilever beam optical microphone with ultra-high sensitivity. It can be widely applied
Transformer online monitoring and fault diagnosis technology is of great significance to improve the safety and stability of the power system.
DK-BSC 3001 series battery spontaneous combustion monitoring system from Duke Technology integrates ultraviolet absorption spectrum, infrared photoacoustic spectrum, cavity enhanced absorption spectrum, Fourier infrared spectrum, tunable semiconductor abs
Ventilation system is to monitor the concentration change of tracer gas to calculate the ventilation efficiency.
SF6 is widely used in GIS as a good insulation and interruption gas.
In oil or gas extraction processes, optimizing production methods is crucial. It is particularly important to accurately understand the flow rates, volumes, flow patterns, and cumulative trends of solid particles during extraction. The sand monitoring sys
The sand monitoring system from Duke integrates the measurement of fluid patterns, flow rate, instantaneous flow, and cumulative flow of sand. It is a low-cost, real-time monitoring system for predicting the flow patterns and cumulative trends of sand.
The sand monitoring system from Duke integrates the measurement of fluid patterns, flow rate, instantaneous flow, and cumulative flow of sand. It is a low-cost, real-time monitoring system for predicting the flow patterns and cumulative trends of sand.
When sand enters the wells or pipelines during the extraction process, it is essential to ensure the clear passage of the sand. Real-time monitoring of the flow rate, instantaneous flow, cumulative flow, erosion rate, and movement patterns of sand/solid p
The sand monitoring system from Duke integrates the measurement of fluid patterns, flow rate, instantaneous flow, and cumulative flow of sand. It is a low-cost, real-time monitoring system for predicting the flow patterns and cumulative trends of sand.
The Duke pigging indicator uses passive acoustic (ultrasonic) technology to sense the pig traveling through the pipeline, utilizing a built-in Lock Frequency Digital Signal Processor (LPDSP).
The DK-SA 830 Gas-Solid Separator operates on the principles of centrifugal sedimentation and density differences. When the fluid enters the separator tangentially at a certain pressure, it generates intense rotational motion.
Based on echo sensing technology, the Duke Non-intrusive acoustic pipe thickness monitor uses high-frequency sound waves generated by piezoelectric transducers to pass through materials.
The innovative DK-SA 850 downhole sand monitoring device features a new tool architecture, integrating advanced sensor design, signal processing technology, and analytical algorithms to accurately detect downhole sand ingress points and assess sand produc
DK-SA 860-S Series Vibration Sensor can connect to analog signal output of acceleration, speed, displacement sensors, can calculate speed and displacement data based on acceleration data, features include different sensor parameter settings, data acquisit
