In-situ laser gas analyzer

Vasthi Instruments are global leaders in manufacturing of In-situ laser gas analyzer(ITLA-1000xx In-situ gas analyzer) and have been supplying instruments to customers worldwide, Our multidisciplinary team of scientists, physicians, engineers, and regulatory consultants with decades of global experience brings you the quintessential mechanism that provides complete safety accuracy and durability.

Vasthi Instruments was formed with visionary thinking and innovative ideas resulting in innovative products and solutions. We enhance our product quality by the continuous process of research and development. We have WIDE range of models to suite various site conditions and processes.


Main functional modules of In-situ gas analyzer ITLA-1000xx (In-situ laser gas analyzer) includes transmitter, receiver, reference unit and measurement unit. The transmitter drives the tunable diode to emit laser of certain wavelengths, which passes through the gas cell, then reaches the receiver. The receiver performs signa processing to obtain Second harmonic signal, then calculates the processing to obtain second harmonic signal, then calculates the concentration according to the relationship between the second harmonic signal and the gas concentration.


In situ laser gas analyzer (in situ gas analyzer)can be widely used in industrial process and environmental monitoring at present in situ laser gas analyzer (in situ gas analyzer) has achieved successful application in blast furnace gas,converter gas recovery gas colorific value analysis,electric catching focal safe control,coal injection monitoring,garbage incineration flue gas denitration monitoring and control,etc. Our company also can according to customer’s demand to provide the laser which adapt to the diversified needs of different application fields.


Model – ITLA-1000XX

  1. Non-contact optical measurement, low drift and and with long service lite.
  2. In-situ stack gas analyser is On-side installation, no complex optical path adjustment required.
  3. Reference gas cell adopted, online calibration, no disassemble needed.
  4. Signal line spectrum” technology, free from interference of background gas.
  5. In-situ stack gas analyzer measurement, no sample conditioning required and avoiding the problems that sample is absorbed during conditioning process, blocking, unit damage and etc.
  6. Low maintenance cost


Principle TDLAS (Tunable Diode Laser Absorption Spectroscopy)
Technical Index Linearity Error <+1%F.S.
Repeatability <+1%
Span Drift <+1%F.S./half year
Zero Drift <+1%F.S./half year
Maintenance Cycle <2 times/year(Clean Optical window)
Calibration Cycle ,2 times/year
Response Time <1s
Signal I/O Analog Output 2 4-20mA output(Isolation, ax load 750ᾨ)
Analog Input 2 4-20mA input (temperature and pressure compensation)
Relay Output 2(24V,1A)
Digital Output RS485/RS232/GPRS
Work Condition Power Supply 24VDC or 220VAC
Ambient Temperature -20˚C˜+60˚C
Purge Gas 0.3MPa˜0.8MPa Industrial nitrogen, purification instrument air,etc
Installation Installation Method In-Situ Installation
Technical Specifications Repeatability 1%
Linearity +1%F.S.
Response Time <1s
Zero Drift +1%F.S./half year
Span Drift +1%F.S./half year
4-20mA Analog input Load 2
4-20mA Analog output Load 2
Switch Input Load 2
Switch Output Load 2
RS232 OK
RS485 OK
Ambient Temperature -20˚C˜+60˚C
Power Supply 24 VDC
Type of Protection ExdIICT6 Gb
Enclosure Rating IP66