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Moisture in Liquid EExd Certified On-line Analyser

Moisture in Liquid EExd Certified On-line Analyser

13 October 2008

Michell Instruments new LIQUIDEW EExd moisture in liquid on-line analyser will be presented for the first time in the Middle East by Bin Saud Technical Trading at Adipec (stand H77/66).

LIQUIDEW EExd is a purpose designed flameproof certified solution to on-line continuous moisture measurement for petrochemical liquid applications. The instrument is designed to be wholly installed in the hazardous area, so simplifying site installation and retrofits. Moisture content is determined in part per million by weight (ppmw) through Henry’s Law calculation. The method utilizes the measured dew point temperature, the liquid temperature and values from a pre-programmed extensive list of saturation concentration data for a variety of petrochemical liquids. For cases where customised liquid characteristics data are required, they can be entered quickly and easily by the user.

LIQUIDEW EExd is certified as flameproof for use in IEC Zone 1 and 2/NEC Class 1 Div. 1 and 2 hazardous areas. The Main unit (electronics and sensor) together with the associated sampling system may be mounted at a convenient location next to the pipeline or process with liquid sample and process return connections.

To save additional costs and inconvenience for the user, LIQUIDEW EExd analyser and sampling system only requires a single, low wattage, single phase AC supply. No barrier units or safety earth are required.

The LIQUIDEW EExd moisture in liquid analyser is available in one or two channel versions. Best practise in sample handling and conditioning is achieved by the Premium Sampling Systems offered to complete the comprehensive factory built analyser package.

LIQUIDEW EExd utilizes the Michell Ceramic Moisture Sensor with integrated temperature measurement, offering proven reliability and performance with numerous installations in natural gas or petrochemical applications. The moisture in liquid analyser offers a complete measurement range capability from low trace moisture below 1 ppmw up to the saturation concentration specific to the fluid being measured and the analysis temperature.

The advanced firmware of LIQUIDEW EExd provides moisture measurements in ppmw through the application of Henry’s Law using pre-programmed saturation concentration (Cs) values for the most common pure hydrocarbon liquid applications. (Hexane, n-Propane, Benzene, Propylene etc). For applications with complex mixture fluids, customers can enter their own Cs values from their own sources.

For LIQUIDEW EExd the unique Michell Calibration Exchange Service simplifies field calibration whilst maintaining traceability to international metrology standards NIST (USA) and NPL (UK). With the calibration data for each individual LIQUIDEW EExd Sensor programmed into on-board, non-volatile memory, the fitment of a delivered Calibration Exchange Sensor renews the calibration with minimal downtime. No programming or data input is required by the user to complete the calibration process.

  • Process Sensing Technologies PST GmbH
    Max-Planck-Straße 14
    61381 Friedrichsdorf
    Germany / Europe
    Tel.:+49 (0)6172 5917-0
    Fax:+49 (0)6172 5917-99
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