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Hangzhou Chunlai Technology CO., Ltd.
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  5. Zetian - Model LGT-350 - Laser Humidity ...

Zetian - Model LGT-350 -Laser Humidity Analyzer

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LGT-350 Laser Humidity Analyzer is a high-precision humidity analysis product based on Tunable Diode Laser Absorption Spectroscopy (TDLAS), which can measure humidity in in-situ single ended method. The product adopts imported semiconductor laser as light source. It regulates laser frequency through modulating working current intensity of the semiconductor laser to make scanning range is slightly larger than absorption line of measured gas. When measured gas is absorbing in frequency selection, laser intensity will attenuate. The instrument can obtain concentration of measured gas by detecting attenuation information of laser intensity.

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  • Optical non-contact measurement with small drift and long service life
  • Adopt single-ended method for measurement, no need of complex adjustment for optical path
  • Employ "Single-line spectrum" measurement, free from cross interference of background gases
  • Realize alternative calibration technology and solve making problem of H2O standard gas; high calibration accuracy
  • Use in-situ measurement, no need of pretreatment system; prevent problems of absorption, blockage and component damage in preprocessing and sampling process; reducing operating cost
  • It can be applied in flue gas humidity measurement in CEMS and various industries including lumbering, building material industry, paper-making industry, chemical industry, pharmacy, fiber industry, textile industry, vegetable &food processing industry, etc. In addition, it can be used in humidity measurement under high temperature such as drying kiln of ceramics and drying furnace of covered electrode, etc.
  • Range: 0~40% (customizable)
  • Linearity error: ≤1%F.S.
  • Span drift: ≤1%F.S./half a year
  • Zero drift: ≤1%F.S./half a year
  • Analog input: 4x4-20mA input (temperature, pressure compensation)
  • Analog output: 3x4-20mA output (isolation, max load of 750 Ω）Response time: ≤1s (T90)
  • Digital output: RS485/RS232/GPRS
  • Working temperature: -20℃~60℃
  • Purge gas: (0.3~0.8)MPa Nitrogen or purified instrument air
  • Installation method: In-situ method