Beijing Qinglian Measurement and Control Technology Co., Ltd

Home page

Product

Contact

Beijing Qinglian Measurement and Control Technology Co., Ltd

Tel：18500242456
Email：sales@qingliancekong.com

Address: Inside Beijing Taixing Art Institute, Shuipo Village, Gaoliying Town, Shunyi District, Beijing

OMA Lightweight Aromatic Hydrocarbon Analyzer

BTX ANALYZER

The OMA-300 Light Aromatic Hydrocarbon Analyzer can continuously analyze the UV-Vis absorbance spectra and concentrations of benzene, toluene, xylene, and other aromatic hydrocarbons.

Product Features

Performance

Real-time analysis of light aromatics Using multi-component analysis software, continuously and independently determine the actual concentrations of benzene, toluene, xylene, and other light aromatic hydrocarbons. Fast, continuous readings T90 response time is less than 10 seconds. No false alarms Measure the concentration of light aromatic hydrocarbons only in the absence of interference from other substances. Extremely wide dynamic measurement range It can maintain high accuracy even when the sample concentration varies significantly.

Reliability

Fully automated operation under unmanned supervision Automatic purging and zeroing function; optional remote automated control Inherent Security Design The sample never comes into contact with or enters the interior of the analyzer housing. Customize various alarm and communication outputs. 4-20mA analog output, MODBUS; HART, etc.

Flexibility

It can measure the concentration of any light aromatic hydrocarbon. From 0-10 ppm to 0-100% Directly measure hot/moist samples The standard flow cell can withstand samples at 150°C and 3,000 psi.

Usage cost

No consumable materials or reagents. In addition to purging with standard gas, Low maintenance requirements Simply require wiping the lenses once a month. Long-life xenon light source Average service life of 5 years Instrument with an all-solid-state structure Stands out among competitors due to the absence of moving parts.

Compatibility

Explosion-proof certificate Class I Div 1 & 2; ATEX; GOST... View certifications No-analysis cabin Can be installed directly outdoors.

Application areas

Aromatic hydrocarbons such as benzene, toluene, and xylene are mostly carcinogenic compounds. This fact also underscores many real-world industrial examples: atmospheric emissions of aromatic hydrocarbon compounds are strictly controlled; products like fuels, adhesives, detergents, and other solvents are required to keep their concentrations of aromatic hydrocarbon components below specified limits.

Fortunately, aromatic hydrocarbons exhibit very strong absorbance in the ultraviolet wavelength range, making it easy to determine their concentrations using spectroscopic principles. The laboratory ASTM standard D1017-51 employs ultraviolet spectrophotometry to analyze aromatic hydrocarbon compounds, and the OMA system operates on a similar principle, enabling continuous, online, and rapid readings of concentration values.

Using a dispersive UV-Vis spectrophotometer, the OMA light hydrocarbon analyzer can continuously measure absorbance at each wavelength within the 200 to 300 nanometer range—within this wavelength interval, each aromatic hydrocarbon exhibits a unique and distinct absorbance curve. This capability enables the OMA light hydrocarbon analyzer to easily distinguish and accurately display the concentration of each individual aromatic hydrocarbon.

Wide range of applications

Atmosphere
Hydrocarbon solvent
Kerosene/Aviation Fuel
Liquefied Natural Gas

Technical concept

Monitoring Principle

The OMA online analyzer uses the principles of ultraviolet and visible spectroscopy to determine the concentrations of chemical components in a sample. The OMA system analyzes the absorbance of the sample across wavelengths from 200 to 800 nanometers, and the data is captured by a 1024-element photodiode array detector and transmitted to a processor for data analysis, yielding high-resolution absorption spectra.

Optical structure

The OMA process online analyzer uses a long-life xenon lamp as its light source to transmit signals that come into contact with the sample via a flow cell. This signal is emitted by the light source and transmitted through an optical fiber cable into the flow cell, where it interacts with the sample gas. Samples composed of various chemical substances exhibit unique absorption characteristics for light. The resulting light signal then exits the flow cell, travels back to the detector via another optical fiber cable.

Absorbance Curve: Light Aromatic Hydrocarbons

To detect the concentrations of benzene, toluene, and xylene, OMA identifies the unique absorbance spectra of pure analytes and uses mathematical methods to separate and isolate the analyte’s absorbance spectrum from that of the sample being measured. Based on Beer-Lambert’s law, OMA correlates the unique absorbance spectrum of each analyte with its actual concentration.

User interface

AAI’s proprietary ECLIPSE software processes the acquired spectral data into actual concentration readings. On the touchscreen controller, the analyzer operator can easily switch between different interfaces—such as trend graphs, spectra plots, concentration readings, and more—and can independently and at any time set and adjust alarms, outputs, purge functions, zeroing, and other parameters.

Safety performance

Most analyzers directly introduce the sample into the analyzer’s housing for measurement. However, if the sample is toxic, highly corrosive, or explosive, this could be extremely dangerous. The OMA design is unique: instead of introducing the sample into our analyzer, we guide the optical signal into the sample itself. The sample flows only through a flow cell and never comes into contact with the analyzer. The flow cell is connected to the analyzer via an optical fiber cable.

Sample system

The OMA is designed specifically for direct monitoring of high-temperature or water-containing samples. This design philosophy allows us to simplify the sampling system while preserving the integrity of the samples. Drawing on our extensive experience in sampling system design, we’ve found that many different applications share striking similarities yet exhibit subtle differences from one another. Therefore, we tailor each sampling system uniquely to the specific requirements of every individual project—starting from analyzing the user’s sample data and gaining a deep understanding of their process, through detailed design drawings, and culminating in actual production and system integration. For each user, we create a sampling system that is 100% perfectly matched to their needs.

Optional models

OMA products of various models share the same electronic architecture, and their monitoring functions and performance are identical. The differences among these models lie in their external structural designs and the materials used, with the aim of meeting the diverse requirements of different applications.

Technical Parameters

The following technical specifications are based on the premise that all components and the sample system are supplied by AAI, and that the system installation has been approved by AAI. For technical specifications under other conditions, please consult AAI’s sales team directly.

General

Runtime environment
Measurement principle	Dispersion Ultraviolet-Visible Spectrophotometry
Detector	nova II™ UV-Vis Diode Array Spectrometer
Spectral detection range	200–800 nm
Light source	Pulsed xenon lamp light source, with a service life of five years.
Signal transmission	600-micron core, 1.8-meter-long optical cable; other lengths available upon request.
Sample Preprocessing	Custom-designed for different applications
Analyzer calibration	Before leaving the factory, the instrument is calibrated using a standard gas that has been certified by the manufacturer; users do not need to recalibrate it again. The system’s accuracy is ensured by an automatic zeroing function.
Reading verification	Quickly and easily verify using standard samples and self-diagnosis functions.
Controller	Industrial controller equipped with an LCD touch screen and ECLIPSE™ operating software.
Data storage	Pure solid-state drive
Analyzer environmental conditions	Suitable for both indoor and outdoor use; no analysis cabin required.
Ambient temperature	Standard: 0 - 35 °C (32 - 95 °F)
	Optional: -20 to 55 °C (-4 to 131 °F)
	To avoid thermal radiation, it is recommended to install the analyzer under a sunshade in environments with direct sunlight.
Sample temperature	Standard: -20 – 70 °C (-4 – 158 °F)
	Optional: When equipped with a cooling extension, the maximum temperature can reach up to 150 °C (302 °F).
	If the temperature exceeds 150 °C (302°F), please contact AAI.
Sample pressure	Standard flow cell: 206 bar (3000 psi)
	Insertion probe: 100 bar (1470 psig)
Power requirements
Electricity	85 - 264 VAC 47 - 63 Hz
Power consumption	45 watts
Output
Standard output	One measured substance corresponds to one 4-20 milliamp analog output (up to three channels are available; additional options available after upgrade).
	Two digital outputs correspond to alarm and pre-processing control.
Optional output	Modbus TCP/IP; RS-232; RS-485; Fieldbus; Profibus; HART;
Appearance features
Select the analyzer housing	OMA-300 Wall-Mounted
	OMA-206P Portable
	OMA-406R Rack-Mounted

Performance

Range and Accuracy of Light Aromatic Hydrocarbons The standard range and accuracy for light aromatics are as follows; other ranges are available upon request.
Benzene/Toluene/Xylene	Gaseous sample	0-50 ppm: ±2 ppm 0–100 ppm: ±1% of full scale 0–10,000 ppm: ±1% of full scale
Benzene/Toluene/Xylene	Liquid sample	0-10 ppm: ±0.5 ppm 0–100 ppm: ±1% of full scale 0–10,000 ppm: ±1% of full scale

Certificate

The following are typical explosion-proof certificates; other types are also available:

Standard design	Non-explosion-proof
Offer optional	ATEX, IECEx, EAC, PESO, JPN, KTL
For other certificates, such as CSA, FM, etc., please contact your sales representative.