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 Wopo Index Online Analyzer

The full-spectrum Wobbe index analyzer is used to measure the interchangeability of natural gas.

Quickly measure the fuel’s exchangeability (Wobbe index) and component concentrations online, delivering a fully automated, all-optical analyzer for you.

Product Features

Performance

Directly measure the Wobbe index Contrary to traditional techniques that rely on indirect measurements of residual oxygen, the OMA employs purely optical methods to directly measure the concentration of fuel’s chemical components and outputs the Wobbe index. Fast, continuous measurement Overall response time is less than 10 seconds. Indium Gallium Arsenide Semiconductor Technology Especially stable performance

Reliability

No need for real-time human monitoring. Automatic zeroing function with timing Secure and worry-free internal design Fuel never enters the inside of the analyzer. Customizable alarms and outputs 4-20mA analog output, MODBUS, HART, etc. View technical specifications

Total cost

Non-consumable Only consumes zero gas. Low maintenance Simply wipe the lenses regularly. All-solid-state structural device Since it has no moving parts, its stability far surpasses that of competing products.

Compatibility

Direct measurement of high-temperature/water-containing samples The sample can withstand temperatures up to 66 degrees Celsius and pressures up to 3600 psig. Explosion-proof certificate Class I Div 1 & 2; ATEX; GOST... View certifications Class I Div 1 & 2; ATEX, IECEx, EAC, and more. No-analysis cabin Can be installed independently outdoors.

Application areas

The Wobbe index reflects the calorific value of a fuel gas and takes into account the proportional relationship between the calorific value and the specific gravity (the ratio of the density of a given fuel gas to that of air). More precisely, this specific gravity is directly proportional to the flow velocity of the fuel gas passing through a fixed throttling area under constant pressure—and thus, it is also directly proportional to the calorific value.

This measurement is particularly important for this application, as it can help operators quickly determine the interchangeability of two or more different gases. Such measurements are indispensable in flare systems or natural gas metering stations.

Technical concept

To analyze the concentration of chemical components in the sample gas, the OMA employs infrared technology and is equipped with an InGaAs indium-gallium-arsenide sensor. This analytical instrument can detect wavelengths ranging from 1550 nm to 1850 nm and quantifies the light absorbed by the sample gas. The OMA then plots this data to produce a high-resolution absorbance spectrum.

OMA employs a long-life tungsten light source to emit an optical signal into the flow cell. This optical signal is transmitted to the flow cell via optical fiber and comes into contact with the sample gas flowing through the cell. Depending on the varying total component concentrations in the sample gas, different levels of absorbance will be observed.

Technical concept

Sample system

The sampling system of the OMA Wobbe Index Analyzer enables the analyzer to quickly, automatically, and reliably obtain Wobbe index data for natural gas.

The preprocessing includes the following main components:

NEMA 4 Powder-Coated Carbon Steel Enclosure
Densimeter and Pressure Sensor
Particle filter
Sample gas inlet pressure regulating valve
Calibration air inlet pressure regulating valve
Sample gas inlet flowmeter
Sample gas bypass loop flowmeter
Automatic zeroing uses a pneumatic three-way valve.
Manually calibrated three-way ball valve
Explosion-proof heater
Sample reflux check valve
The materials used for the parts that come into contact with the sample gas during pretreatment include: 316 or 316L stainless steel, fluororubber, polytetrafluoroethylene, and quartz glass.

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	Indium-Gallium-Arsenide Infrared Photometry Technology
Detector	nova II™ InGaAs Spectrophotometer
Wavelength range	1550–1850 nm
Light source	Tungsten lamp
Signal transmission	600-micron core, 1.8-meter-long optical cable; other lengths available upon request.
Flow cell length	Varies depending on the application.
Sample Preprocessing	Wopar Index Sample and Processing System Materials in contact with the sample gas: 316/316L stainless steel, fluororubber, polytetrafluoroethylene, quartz glass.
Analyzer calibration	Calibration before shipment
Controller	Industrial controller equipped with an LCD touch screen and ECLIPSE™ operating software.
Data storage	Solid-state drive
Analyzer environmental conditions	Suitable for both indoor and outdoor use; no analysis cabin required.
Ambient temperature	Standard: -20 to 35 °C
	Optional: -40 to 60 °C
	To avoid thermal radiation, it is recommended to install the analyzer under a sunshade in environments with direct sunlight.
Sample temperature	Standard: -40 – 66 °C
Sample pressure	Up to 3600 psig
General Equipment Requirements
Voltage	85 - 264 VAC, Single-phase
Power	45 watts
Instrument air	70 psig
Nitrogen	High-purity nitrogen
Output
Standard output	One measured substance corresponds to a 4-20 milliamp analog output channel. (Up to 3 at most; can be upgraded to more)
	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

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.