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Yokogawa Corporation of America

YOKOGAWAYokogawa 100th Anniversary

North & Central America



Tunable Diode Laser Spectrometer



The TruePeak Tunable Diode Laser Spectrometers operate by measuring the amount of a laser light that is absorbed as it travels through the gas being measured. Involving no sensor contact with the process and no moving parts, it leads to a high mean time between failures (MTBF) and hence a low long term cost of ownership (LTCO).

Fired heaters are integral to industrial processes, including hydrocarbon processing and power generation. Specifically designed for the reaction of fuel and air to produce extremely high gas temperatures, heaters transfer this energy to potentially highly flammable process fluids via heat exchangers. They consume large quantities of fuel, produce large quantities of emissions and are a potential safety hazard to personnel and plant.

Yokogawa TDLS analyzers help control fired heater combustion with ever greater accuracy and reliability. There are measureable rewards for operating fired heaters at Low Excess Air (LEA) levels. In LEA combustion control, the lowest level of fuel is consumed and the products of combustion are cooled the least by unused excess air.

The cost benefits of these efficiencies are considerable, with just a single percentage saving in fuel enabling savings of tens or even hundreds of thousands of dollars per year. Controlling air levels just above the point at which incomplete combustion starts also enables the "cleanest burn," helping plants meet environmental emissions requirements. This in particular reduces the emission of NOx.

In-Situ Gas Analyzer TDLS200


Extractive O2 Analyzer TDLS220


Extractive Impurities Gas Analyzer TDLS500

The TDLS500 is a continuous gas analyzer with parts-per-billion (ppb) detection limits and no cycle time using a multi-pass optical bench.  The common measurements include acetylene (C2H2), ammonia (NH3), methyl-acetylene (m-C2H2), hydrogen sulfide (H2S), and carbon monoxide (CO).