Beijing Qinglian Measurement and Control Technology Co., Ltd

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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 Odor Analyzer

ODORANT ANALYZER

Simplify the odorization process through reliable odor/thiol monitoring. The OMA series is a solid-state solution that can replace or supplement human olfactory detection.

Product Features

Performance

Rapid, consecutive readings T90 response time is less than 10 seconds. No false alarms The odor measurement is not interfered with by the presence of other possible chemical substances. Extremely wide dynamic measurement range It can maintain high accuracy even when the sample concentration varies significantly.

Leverage abundant data resources

Abundant data resources High-frequency detection can improve the analyzer's accuracy. Can simultaneously measure five substances. Each type of odorous gas displays its concentration value independently. H2S and COS concentrations can be additionally detected. Provide complete gas quality information.

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 and other protocols

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

"Clean Flange"-type sample flow cell with a specially designed structure Designed for environmental sanitation applications Explosion-proof certificate Class I Div 1 & 2; ATEX; GOST... View certifications No-analysis cabin Can be installed directly outdoors.

Application areas

An artificially added odorant is introduced into natural gas to facilitate the detection of gas leaks. Local natural gas distribution companies install odor detectors at specific points along the pipeline to monitor the concentration of the odorant in the natural gas and collect data for various reports.

However, natural gas pipelines typically span hundreds of kilometers across provincial boundaries, connecting different regions. Installing odor detectors at regular intervals along such long stretches poses a significant challenge in terms of both manpower and financial resources. By contrast, an online analyzer can serve the same purpose while providing more abundant and highly accurate data for staff analysis. (Odor detectors take intermittent samples at multiple points, whereas online analyzers perform continuous sampling at a single point, yielding data that is far more precise and consistent.)

Online odor analysis enables natural gas distribution companies to minimize the frequency of manual inspections and allows them to optimize the odor-addition system in real time. Another advantage is that, by analyzing the delay times provided by the analytical instruments, as well as data on odorizer performance, degradation effects, and other relevant factors, natural gas distribution companies can optimize the overall performance of their pipelines.

OMA can measure many types of odor-causing substances.

Methanethiol | MeSH
Ethyl mercaptan
Tetrahydrothiophene | THT
Tert-butyl mercaptan | TBM
Proprietary odorants
SCENTINEL® E
SPOTLEAK® 1009
Hydrogen sulfide | H2S
Carbonyl sulfide | COS
Total thiol

Common applications (hydrocarbon gases serve as typical background gases)

Natural gas
Biogas
Landfill gas
Liquefied petroleum gas
Synthesis 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: Methanethiol

To detect the concentration of odorous gases (such as methyl mercaptan), the OMA identifies the unique absorbance spectrum of pure methyl mercaptan and uses mathematical methods to separate and isolate the methyl mercaptan’s absorbance spectrum from that of the sample being analyzed. Based on Beer-Lambert’s law, the OMA correlates the unique absorbance spectrum of methyl mercaptan 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.

Technical Comparison

Below, we compare the technical features of the OMA odor analyzer with those of another contact technique—chromatography.

	OMA Hydrogen Sulfide Analyzer	Chromatography
Response time	Quick The response time of the entire OMA odor analyzer system is within 10 seconds.	Slow The sampling time for chromatography is approximately between 30 seconds and about 1 minute.
Holding cost	Low OMA odor analyzers typically cost half as much as chromatographs. Thanks to their simple operation, they can be easily used even by personnel without specialized training.	High Chromatography analyzers are generally expensive and require well-trained personnel to operate.
Maintenance/Downtime	Low The OMA odor analyzer features a solid-state design with no moving parts. The entire system requires no downtime for maintenance; it is equipped with an automatic zeroing function that activates approximately every sixty seconds and runs automatically every few hours, serving as a self-maintenance feature. The only scheduled preventive maintenance required is a monthly cleaning of the fiber optic lens, which takes less than one minute to complete.	High Chromatographs require many consumables and need to be maintained by experienced engineers.

Sample system

The OMA is designed for direct use in monitoring 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 each application also has subtle differences. Therefore, we tailor and customize each sampling system exclusively for every specific application—starting from analyzing the user’s sample data and gaining a deep understanding of their process, through designing detailed blueprints, 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

Operating 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	Customized design for different applications
Analyzer calibration	Before leaving the factory, the instrument is calibrated using a standard gas 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 when exposed to 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; other 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

Methanethiol Range and Accuracy
The standard measurement range is as follows; other measurement ranges are available upon request, and other substances can also be selected. Accuracy is higher at higher pressures. 0–10 ppm (@10 bar): ±0.1 ppm 0–10 ppm (@1 bar): ±1 ppm 0–100 ppm: ±1% full scale or 1 ppm* 0–10,000 ppm: ±1% of full scale 0-100%: ±1% of full scale *Take the larger one as the standard.

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.