Orthodyne USA: Pioneers in Gas Chromatography SolutionsOrthodyne USA: Pioneers in Gas Chromatography SolutionsOrthodyne USA: Pioneers in Gas Chromatography Solutions

Orthodyne USA: Pioneers in Gas Chromatography Solutions

Welcome to Orthodyne USA, a leading expert in gas chromatography with a rich history dating back to the 1920s. Originally a family business manufacturing wireless radio sets, our expertise has evolved into cutting-edge instruments, detectors, and analytical solutions. We specialize in providing total analytical solutions tailored to meet specific customer requirements, offering a wide range of products and services for gas analysis.

At Orthodyne USA, purity is our top priority. Our meticulously designed appliances are built to analyze gases, detect impurities, and achieve the required detection thresholds. Trusted by major gas producers and suppliers worldwide, our equipment finds applications in various industries, including pharmaceuticals, medical, food, space, nuclear, electronics, and steel.

Driven by continuous improvement and innovation, Orthodyne USA complies with industry standards and utilizes smart technologies to enhance safety, cost-effectiveness, and efficiency. Our dedicated research and development team ensures that we remain at the forefront of the gas chromatography sector.

As Orthodyne USA, we are excited to bring our comprehensive range of analytical instruments, solutions, and services to the American market. Join us on our journey of precision and discover how Orthodyne USA can revolutionize your gas analysis needs, providing unparalleled accuracy and reliability for your operations.


Discover our expertise in utilizing cutting-edge analytical techniques to cater to a wide range of applications in gas chromatography and continuous gas analyzers.


Our innovative design leverages the inherent electrical conductibility variations present in highly ionized gas. By utilizing a single high frequency discharge within the detector (HF Plasma), we induce ionization and trigger the emission of high energy photons (24.5 eV). This emission effectively ionizes all gases within the cell, with the exception of carrier gas.
One of the notable advantages of our system is that it achieves a photo-ionized discharge without any radioactive emissions, eliminating the need for excessive voltage application to the cell. Additionally, our detector operates efficiently using just one gas. This versatile gas serves as the carrier, flushing gas, purging gas, and can even be used for valve purging and cleaning. Remarkably, the housing itself does not require a separate flushing gas. To fine-tune the detector's sensitivity, the power setting of the high frequency oscillator can be adjusted. Sensitivity levels as low as 0.1 ppb (parts per billion) can be achieved. It's worth noting that the detection limit and background noise are directly influenced by the quality of the carrier gas. For optimal performance, we highly recommend utilizing ultra-pure (UHP) Helium as the carrier gas.

Flame ionization

Our flame ionization detector (FID) is housed within a carefully temperature-regulated chamber to ensure optimal performance. It is specifically designed to detect minute amounts of hydrocarbons in neutral gases. The detection process involves the combustion of Hydrogen and Synthetic Air, creating a flame that consumes the organic components present in the gas being analyzed. During combustion, these components generate ions that are subsequently collected by an electrode. The resulting weak current is then amplified using a high-gain electrometer and directed towards a data acquisition system for further analysis. To achieve the best possible results, a polarization electrode is connected at the nozzle level, while a collecting electrode with adjustable distance is employed. In addition, when coupled with a methanizer (UMTR unit), our FID is capable of detecting traces of CO and CO2 as well. The methanizer serves to convert these trace amounts of CO and CO2 into methane through a catalytic reaction that takes place in a specially designed reactor. This conversion occurs at a temperature of approximately 350°C in the presence of excess Hydrogen. With precise temperature control and an optimized flow rate, the methanizer achieves an efficiency level close to 100%. When supplied with high purity gases, our FID exhibits an impressive detection threshold of up to 1 ppb (parts per billion), enabling the identification and quantification of extremely low levels of target compounds.


The TCD (Thermal Conductivity Detector) Gas Chromatograph, while not as sensitive as other detectors, offers the advantage of being non-specific and non-destructive in nature. This detector comprises an electrically-heated wire or thermistor, typically made of tungsten-rhenium wire. The temperature of the sensing element is influenced by the thermal conductivity of the gas that surrounds it. Modulations in thermal conductivity occur when organic molecules displace some of the carrier gas, leading to a temperature increase in the sensing element. This change in temperature is detected as a corresponding alteration in resistance. By monitoring these resistance changes, the TCD can identify the presence of various components in the gas mixture.


The measuring principle of our oxygen sensor is based on the diffusion of oxygen from the sample gas through a ZrO2 (zirconia) cell to the ambient environment. Within the cell, there are inner and outer electrodes that measure the potential gradient. As oxygen molecules diffuse across the cell, a potential gradient is established, and this gradient is directly related to the concentration of oxygen in the sample gas. By measuring the change in potential gradient, we can determine the corresponding change in oxygen concentration. To establish a reference point, the ambient air is used as the baseline value against which the oxygen concentration in the sample gas is compared. This ensures accurate and reliable measurements by providing a consistent and reliable reference value. Our oxygen sensor utilizes this diffusion-based principle to provide precise and real-time measurements of oxygen concentration in various applications.


An essential principle employed in our oxygen sensor is paramagnetism, which is unique to oxygen. The measurement cell is positioned within a magnetic field, and a specifically shaped element is placed in the magnetic field space. This element is initially balanced but free to move. Additionally, a mirror is mounted at the center of the element, which reflects a beam of light from a light source onto photo cells. Oxygen exhibits paramagnetic properties, meaning it is attracted to the magnetic field. When a sample of the gas stream containing oxygen and other gases is introduced, the oxygen displaces the element, causing it to rotate. As a result, the element becomes unbalanced, and the mirror reflects the light beam in a different direction. To restore balance to the sensor, an electrical circuit loop around the element is charged with a specific amount of current. The magnitude of the applied current is directly proportional to the concentration of oxygen in the sample. In summary, this principle utilizes the magnetic field's attraction to oxygen to measure gas concentrations. The rotation of the element, detected by the change in reflected light, is counterbalanced by the application of current, providing a precise measurement of oxygen concentration in the gas sample.


Absolutely, each IR-active gas molecule possesses a distinct absorption spectrum. This implies that each molecule selectively absorbs energy at specific wavelengths, resulting in a unique "fingerprint" for that particular substance. The absorption is directly related to the energy portion of the spectrum associated with a specific wavelength. By detecting the wavelengths and the extent of their absorption, we can gather two crucial pieces of information. Firstly, we can determine the presence of a specific gas within a composition based on its characteristic absorption pattern. Secondly, we can quantify the amount of that gas present. Our sensor operates in the 2 to 15µm region of the electromagnetic spectrum, which is advantageous because many gases exhibit characteristic absorption in this wavelength range. This enables our sensor to identify and quantify a wide range of gases based on their distinctive absorption patterns within this specific region of the spectrum.


We provide specialized gas chromatography and continuous analyzer solutions for air separation, cylinder filling, food and beverages, medical, semiconductors, and environmental analysis across multiple industries.

Air Separation Unit

Air Separation Unit

Cylinder Filling Plant

Cylinder Filling Plant

Food & Beverages

Food & Beverages





Green hydrogen

Green hydrogen

Our products

Orthodyne offers a range of GC equipment and products for various applications in gas chromatography:

Gas Chromatographs

Orthodyne provides high-quality gas chromatographs for precise separation and analysis of chemical compounds in various samples.

Online Analyzers

Orthodyne specializes in system integration, combining different components and technologies to create customized solutions that meet specific analytical requirements.

System Integration

Orthodyne specializes in system integration, combining different components and technologies to create customized solutions that meet specific analytical requirements.

Chromatographic Software

Orthodyne specializes in system integration, combining different components and technologies to create customized solutions that meet specific analytical requirements.


Orthodyne specializes in system integration, combining different components and technologies to create customized solutions that meet specific analytical requirements.
With its comprehensive range of GC equipment, online analyzers, system integration capabilities, chromatographic software, and accessories, Orthodyne offers complete solutions for gas chromatography applications, catering to the diverse needs of industries such as research, pharmaceuticals, environmental analysis, and more.

Our integration Capacities

The video highlights Orthodyne's expertise in gas chromatography and its commitment to providing innovative solutions. It showcases various applications of Orthodyne's gas chromatography equipment in industries such as air separation, cylinder filling, food and beverages, medical, semiconductors, and environmental analysis. The video emphasizes Orthodyne's dedication to quality, precision, and meeting industry standards, as well as its focus on customer satisfaction through tailored solutions and continuous improvement.

Meet Orthodyne’s new range of Continuous detectors : line 8000

The video showcases four different types of detectors used in gas chromatography: Infrared, Binary, Paramagnetic, and Zirconia. These detectors are part of Orthodyne's expanding portfolio of gas chromatographs and analytical solutions. It highlights Orthodyne as a trusted partner in the field of gas chromatography.

About Orthodyne Analytical USA

Orthodyne Analytical USA is a subsidiary of Orthodyne specifically established in the United States, it would likely serve American customers with their range of gas chromatographs and analytical instruments.

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50+ years of experience

With over 50 years of experience, Orthodyne has become a trusted leader in gas chromatography and analytical solutions, delivering innovative products and services worldwide.

Worldwide GC expert

With over 50 years of experience, Orthodyne has established itself as a global leader and expert in gas chromatography solutions. From its headquarters in Alleur, Belgium, Orthodyne has expanded its reach worldwide, providing innovative and reliable analytical instruments, detectors, and total analytical engineering solutions. Orthodyne continues to deliver cutting-edge solutions that meet the evolving needs of its customers. With a commitment to excellence and a customer-centric approach, Orthodyne remains at the forefront of gas chromatography technology, driving advancements and empowering industries globally.

Total analytical solutions

The company's expertise spans various industries, including air separation, cylinder filling, food and beverages, medical, semiconductors, and environmental analysis. By offering a comprehensive range of gas chromatographs, online analyzers, system integration services, chromatographic software, and accessories,

Dedicated customer care service

At Orthodyne, we prioritize our customers' satisfaction and success by providing a dedicated customer care service. With a deep understanding of the importance of strong relationships and effective communication, our customer care team is committed to delivering exceptional support and assistance at every stage of the customer journey. Whether it's providing technical guidance, addressing inquiries, or offering personalized solutions, we strive to go above and beyond to ensure our customers receive the highest level of care. Our knowledgeable and responsive team is always ready to listen, understand, and proactively meet the unique needs and challenges of our valued customers, fostering long-term partnerships built on trust, reliability, and exceptional service.

Building Trust with Valued Customers

Our customers trust us because of our proven track record of delivering reliable and high-quality gas chromatography solutions. With decades of experience and expertise in the field, we have earned the trust and confidence of a wide range of industries and clients worldwide. We take pride in our commitment to understanding their unique requirements, providing tailored solutions, and delivering exceptional results. Our dedication to customer satisfaction, along with our advanced technology, innovative approach, and comprehensive support, has established us as a trusted partner in the gas chromatography industry. Time and time again, our customers rely on us to meet their analytical needs with precision, accuracy, and unwavering reliability.

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