Advantages
Humanization design of tracing pipe, fast disassembly and assembly
Measurement data can be recorded in real time, which can be exported to USB flash disk through one click
Equipped with color display screen and touch operation mode, easy for use
Optical non-contact measurement with small drift and long service life
Directly display sampling gas flow, convenient for regulation and check
Adopting imported high-temperature diaphragm pump, the device runs stably
With features of high integration, small size, light weight, convenient to carry
Adopt high-precision TDLAS Technology with high measurement accuracy and fast response
Adopt "single-line spectrum" technology and the measurement is free from cross interference of the background gases
Measuring cell uses Long-path Multiple Reflection Technology with low detection limit, meeting each index requirement of ultralow emission
Working Principle
TDLAS
The Tunable Diode Laser Absorption Spectroscopy (TDLAS) utilizes the tunability of laser wavelength that the emission wavelength changes with working temperature and current. It can make the laser wavelength changes periodically in small range through periodic regulation of the current. In each period, "single-line absorption spectrum" data of the measured gas can be obtained. At present, TDLAS technology has developed into a gas detection technology with high sensitivity, high resolution, high selectivity and fast response, widely applied to fields including molecular spectrum research, industrial process monitoring and control, combustion process diagnosis and analysis, measurement of engine efficiency and vehicle exhaust , explosion detection, trace pollution gas monitoring in the atmosphere, etc.
The LGT series laser gas anlyzer makes use of the tunability of semiconductor laser. It scans to obtain the specific absorption lines of the measured gas and gets its second harmonics. The measured gas concentration can be calculated by processing and analyzing the second harmonics as well as gas broadening information.
Features
High Selectivity
TDLAS is a kind of high-resolution spectrum technology. Due to the "fingerprint" characteristic of molecular spectrum, it is free from the interference of other gases, which makes it superior to other methods.
High Versatility
TDLAS is a general technology that can efficiently measure active molecules which have absorption in the infrared or near infrared. Also, the analyzer can be easily modified to measure other components by changing the laser device and standard gas.
High Sensitivity
TDLAS Technology owns features of fast response and high sensitivity. The temporal resolution can reach millisecond level if not losing sensitivity.
System Composition
Technical Index
Sampling Probe
Technical Index (general configuration)
| Heating temperature | ≤200℃ |
| Preheating time | ≤30min |
| Probe rod length | 1m (Customizable) |
| Inner pipe | Single pipe, PTFE, OD: 8mm |
| Pipeline length | 2.5m |
| Filter element material | Stainless steel sintering |
| Power | 220VAC±22V, 250W |
| Filter precision Primary filtering | ≤20μm, secondary |
| filtering | ≤5μm |
| Cable interface | Aviation quick plug |
| Probe rod material | 316SS |
| Handle material | Polyamide |
Analyzer Host
The portable analyzer employs TDLAS Technology to measure gases including O2, CO, NH3, CO2, CH4, H2O, HCl, HF, HCN and H2S without cross interference of background components such as dust, moisture and other gases. The measuring cell adopts Longpath Multiple Reflection Technology. With low detection limit, it meets various index requirements of ultralow emission or comparison.
Technical Index (general configuration)
| Linearity error | 1%F.S. |
| Repeatability | ≤1% |
| Span drift | 1%F.S./half a year |
| Zero drift | 1%F.S./half a year |
| Sampling flow | (3~5)L/min |
| Sampling method | High-temperature extraction |
| Maintenance period | ≤2 times/year, clean optical window |
| Response time (T90) | ≤30s |
| Protective filter precision | ≤5μm |
Interface Signal
| Communication interface | 1 Channel RS485 |
| USB Output | 1 Channel USB Port |
Working Condition
| Preheating time | ≤30min |
| Power | 220 (1±10%) VAC, 50Hz, 1kW |
| Ambient temperature | -20℃ - 60℃ |
| Dimension | 470mm(W)x365mm(D)x190mm(H) |
| Weight | ≤13kg |
Features
Power-on self-test: automatically detect whether the indicators of each analysis module exceed the limit when power-on, to ensure that the data of the instrument is true and reliable
Alarm management: When the temperature in the heating box exceeds the upper and lower limits, an alarm can be issued to prevent the temperature from being out of control and damaging the equipment
Data query: filter and query historical minute data according to time period, enterprise, measurement point, and measurement mode, and export the report file in EXCEL format to flash/hard drive through external USB interface
User management: In order to ensure the effectiveness and safety of the system, set up multi-level user login
Applications
LGT-580 portable laser gas analyzer is widely used in various industries such as multi-level environmental monitoring stations, third-party testing agencies, online analytical instrument production/sales/operation and maintenance providers, coal-fired power plants, gas-fired power plants, cement plants, and steel plants. Environmental comparison and acceptance of flue gas emissions on occasions, emergency testing, instrument calibration, self-inspection of sewage companies, and some laboratory gas detection and analysis.
