Overview
The unique design is sturdy, practical and exquisite, based on ultraviolet fluorescence absorption photometry, mainly including analysis and calculation system, display and signal transmission system, which can provide linear, interference-free and reliable H2S concentration measurement output without any consumables.All total sulphur are passed through a hydrogen furnace and hydrogenated to total sulphur at high temperature to measure total sulfur.
Principle
Ultraviolet Total Sulphur Analyzer is based on ultraviolet absorption photometry. Due to the different molecular structures, there are differences in the absorption of gas molecules to different wavelength spectra. That is, each substance is selective in its absorption of radiation, and has its own characteristic absorption spectrum. Ultraviolet absorption spectroscopy is based on the Lambert-Beer law。
When a beam of monochromatic parallel light passes through a non-dispersive homogeneous medium, the concentration of the medium is C, and the length along the beam propagation direction is L, then the relationship between the light intensity I0 before passing through the medium and the light intensity I after passing through the medium for:
In the formula, I(λ)——transmitted light intensity; I0(λ)——emitted light intensity; C——measured gas concentration; L——the distance of light passing through the absorbing medium; A(λ)——Absorbance, proportional to medium concentration and optical path; σ(λ) ——absorption cross-section, which varies with wavelength, pressure, temperature and has nothing to do with I0(λ), C, L, etc. Comparing the measured absorbance with the absorption cross-section σ(λ) obtained by laboratory analysis, the concentration of the measured gas can be obtained;
Comply with international measurement standards ASTM D4084–07/94,ISO 20729：2017;standard method of measurement;
Comply with Chinese national standard GB/T 11060.8-2020;
Features
Ø The cost is only the initial investment without consumables;
Ø No other gas interference, only react with total Sulphur;
Ø High sensitivity, high precision, good linearity and high accuracy(ppb level, ppm level and % level);
Ø High cost performance, simple maintenance, easy operation and convenient calibration; Low power consumption(3w);
Ø Users can set multiple concentration units(ppb, ppmv, grams, %,mg/m3);
Ø Multi configuration of sampling gas pretreatment system to adapt to diversified actual working conditions, such as high concentration total Sulphur or total sulfur analysis;
Ø High quality UV light source is based on strict factory environment guarantee;
Ø High intelligent human-computer interaction interface, automatic control, self diagnosis,self calibration, detection, data processing and storage, and complete communication functions.
Technical Parameters
Measuring Principle | UV Absorbance |
Wavelength Range | 185~2600nm | Detector | PMT and Si Photodiode |
Light Source | Flash Lamp | Alarm | Contactclosed(60VDC,0.75A Mmax.) |
Operating Temperature | -40~+80℃ | Working Humidity | ≤90%RHnon-condensing humidity |
Repeat Ability | ±2%Measurements | Response Time | 1~30s |
Accuracy | ±2%F.S. | Linearity | ±2%F.S. |
Output Range | 0~100ppb,5ppm,50ppm,100ppm,1000ppm,10%,can be customized |
Input Pressure | Maximum 35MPa,minimum 0.1MPa |
Digital Output | 4~20mA analog,RS485Modbus,USB,Ethernet port,optional Wifi wireless,Bluetooth,RS485 Modbus,Profibus |
Display | 10"color LCD screen,external magnetic expansion button |
Operating Software | Analysis configuration software based on WindowsTM platform;File retrieval,MODBUS mapping |
Fiber Optic Connections | SMA-905 |
Path Length | Factory setting,0.1cm to 3m |
Pressure/Temperature Signal | Expandable by 4~20mA |
Wetted Material | 316SS、Sapphire and Chemraz PX2 Photometer |
Degree of Protection | IP65，IP68 |
Explosion Proof grade | EExdIIAT4 EEx ia IIC T6,EExia IIC T4，EExia IIB T4，ExdIIBT4 |
Power Supply | 220VAC50Hz@10W |
Size | Explosion-proof host 312x344x204mm,positive pressure explosion-proof cabinet 1770x980x408mm |
Weight | Explosion-proof host 21kg,positive pressure explosion-proof cabinet 55kg |
Application
Ø Measurement of natural gas
Ø Petrochemical production
Ø Measurement of condensation
Ø Measurement of natural gas
Ø Petrochemical production
Ø Measurement of condensation
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