Analytical Systems

Process Gas Chromatograph (PGC) analyzers are used to measure the composition of gas and fluid streams in a variety of industrial applications. PGC analyzers use a process of separation and identification of compounds in a mixture to provide qualitative and quantitative data about the composition of the gas or fluid stream. This data can be used to monitor and control processes, troubleshoot problems, and ensure compliance with regulations.

Non-dispersive process photometers (NDIR) are a type of analyzer that uses infrared or ultraviolet-visible (UV-VIS) light to measure the concentration of a specific gas in a gas or fluid stream. NDIR analyzers are a reliable and cost-effective way to measure gas concentrations in a variety of industrial applications.

Reid vapor pressure (RVP) analyzers are used to measure the volatility of a liquid, which is a measure of how easily it vaporizes. RVP analyzers are used in a variety of industrial gas handling and fluid handling applications, including:

• Gasoline blending: RVP analyzers are used to ensure that gasoline blends have the correct volatility to meet emissions standards.
• Petroleum refining: RVP analyzers are used to monitor the volatility of petroleum products during refining.
• Fuel storage: RVP analyzers are used to ensure that fuel storage tanks do not contain liquids with too high of a volatility, which could pose a fire hazard.

Sensors are the primary components that detect and measure specific properties of gases or liquids. They can be designed to measure parameters such as temperature, pressure, pH, conductivity, dissolved oxygen, turbidity, flow rate, concentration of specific chemicals, and more. The selection of sensors depends on the specific application and the parameters that need to be monitored.

In many cases, the process gas or liquid needs to be extracted from the main process stream for analysis. This is typically done using sample probes or sample conditioning systems that ensure the representative sampling of the fluid. The extracted samples are then transported to the analytical instruments for further analysis.

In-situ analyzers measure the components of interest directly in the stack, under process conditions. Extractive systems transport the gas from the stack to the analyzer, and condition the gas to meet the requirements of the analyzer. These analyzers are known for their high sensitivity, accuracy, and selectivity, making them ideal for a variety of gas and fluid handling applications, such as emissions monitoring, process control, and environmental monitoring.

The Extractive Analyzer is a measurement method used in gas analysis where a sample is taken directly from the process line and sent to the analyzer after being conditioned through a sample line and preparation. By extracting a partial gas flow and maintaining constant conditions during analysis, this technology ensures accurate and efficient measurements of gas components in industrial processes.

Hydrocarbon Dew Point Analyzers

Hydrocarbon dew point analyzers determine the temperature at which heavier hydrocarbons begin to condense out of a natural gas stream. Knowing that point matters because liquid dropout damages compressors, fouls burners and puts a shipper outside the specification of the pipeline contract. Chilled mirror instruments measure it directly; calculation-based systems derive it from a gas chromatograph analysis. Find global manufacturers of hydrocarbon dew point analyzers in our Equipment Guide.

Moisture Analyzers

Moisture analyzers measure the water content of a gas or liquid, usually in parts per million, because even traces of water cause corrosion, hydrate formation, catalyst poisoning and off-specification product. Chilled mirror, capacitive aluminium oxide, quartz crystal microbalance and tunable diode laser techniques each suit a different range and application in natural gas, petrochemical and industrial gas processing. Find global manufacturers of moisture analyzers in our Equipment Guide.

Dissolved Oxygen (DO) Analyzers

Dissolved oxygen analyzers measure how much oxygen is held in a liquid, which is a controlling variable in aeration basins, fermentation, boiler feedwater treatment and beverage production. Too little starves the process, too much drives corrosion or spoils the product. Optical luminescence sensors have largely replaced electrochemical cells because they drift less and need no electrolyte or membrane changes. Find global manufacturers of dissolved oxygen analyzers in our Equipment Guide.

Gas Phase Oxygen Analyzers

Gas phase oxygen analyzers measure the oxygen content of a gas stream rather than of a liquid. They are used to confirm inert blanketing on tanks and reactors, to control combustion air in furnaces and boilers, and to verify breathing air and purity in industrial gas production. Paramagnetic, zirconia and tunable diode laser techniques cover percentage levels down to trace ppm. Find global manufacturers of oxygen analyzers in our Equipment Guide.

Total Nitrogen Analyzers

Total nitrogen analyzers report all nitrogen present in a sample, organic and inorganic together, rather than a single species such as ammonia or nitrate. Discharge permits and nutrient removal targets are written in terms of total nitrogen, which is why the measurement is standard on wastewater treatment plants and on industrial effluent. High-temperature combustion with chemiluminescence detection is the usual technique. Find global manufacturers of total nitrogen analyzers in our Equipment Guide.

Total Sulfur Analyzers

Total sulfur analyzers measure all sulfur compounds in a fuel or gas stream as a single figure, which is how fuel specifications and emission limits are written. Refineries use them to certify product, pipeline operators to confirm gas quality, and petrochemical plants to protect catalysts that sulfur would poison. Ultraviolet fluorescence and oxidative combustion with detection are the common methods. Find global manufacturers of total sulfur analyzers in our Equipment Guide.

Raman Analyzers

Raman analyzers identify and quantify chemical species from the way a sample scatters laser light, giving a molecular fingerprint without consuming or altering the sample. Because the probe can look straight through glass or a sapphire window and water interferes very little, Raman suits inline monitoring of reactions, blending and crystallisation in chemical, pharmaceutical and polymer production. Find global manufacturers of Raman analyzers in our Equipment Guide.