Rowaco AB

Natur- och biogasanalys

Precisive® 5 hydrocarbon composition analyser

Tunable filter spectrometer for real-time gas analysis

The Precisive® 5 Hydrocarbon Composition Analyzer is an infrared absorption based on-line monitoring system configured for measurement of alkanes: methane, ethane, propane, butanes and pentanes. It is a realtime optical analyzer capable of accurately separating the hydrocarbon components; which previously could only be performed by Gas Chromatograph (GC) analyzers.

Precisive® 5 gas analyzers require no carrier-gases, no-calibration gases and offer fast response analytics without compromising accuracy, repeatability, linearity or stability in the presence of interference. Precisive 5’s faster-response multi-component analysis provides significant cost-savings and efficiency gains in power generation applications.

Key features

Fast response for real-time control & optimization
C1 – C5 alkane separation, CO2, & calorific value
Flow-through analysis without the need for carrier-gas
Remote, unattended continuous operation
Eliminates carrier gases and other consumables
Virtually zero cross-sensitivity, high sensitivity & linearity

Precisive TFS™ Light Absorption Spectroscopy
The Precisive TFS™ (Tunable Filter Spectrometer) sensor platform consists of a light source, a sample cell (for gases, liquids or solids), a wavelength separating element (spectrometer) and a photo-detector. The wavelength separating element “slices” the wavelength components of the broadband light source which then interacts with the sample molecules. Some of the wavelength components are absorbed and some are transmitted through without any absorption.

Advanced Spectral Decomposition Algorithm
Precisive TFS™ Tunable Filter Spectrometers use an advanced spectral decomposition algorithm. The resulting spectrum is called absorption spectrum, which acts as “fingerprints” which are used to identify the sample components and/or quantify the composition of the sample.

Full C1 Through C5 Analysis
Using a unique wavelength-sweeping tunable filter spectrometer, fast update rates down to sub-second intervals are performed for the full C1 through C5 analysis. Sampling is a flow-through type, suitable for a continuous, on-line, unattended operation. This analyzer does not require carrier gas, fuel gases, or on-site calibration gases. The standard system configuration provides measurements of up to 100% methane, 25% of ethane, 25% of propane, 10% of butanes and 5% of pentanes. Other ranges and/or additional gases are available.

Precisive® Hydrocarbon Composition Analyzer Applications