On-line Sulphur Analysers Achieve ATEX Zone 1 Status

Chromatotec (France) has launched its MEDOR Exp online analyser in 2009, encased in an EX rate cabinet, for operation in hazardous areas. MEDOR Exp offers a reliable and cost effective solution to online analysis of sulphuric compounds in natural gas and it has just been awarded ATEX Zone 1 certification.

ATEX consists of 2 EU directives which specify what equipment can operate in a potentially hazardous industrial area. Zones 1 and 2 are for areas in which a mixture of hazardous substances are likely to be present in the air, in the form of gas, vapour or mist, that could easily combust or explode on ignition. Zone 1 areas are environments considered to have such threats permanently present during operation, whilst Zone 2 has the same level of danger, but only at certain times. MEDOR Exp's ATEX approval has significantly widened its versatility for Chromatotec's customers.

The MEDOR Exp is ideal for use in refineries and heavy industry. MEDOR Exp is the only automated GC specifically designed to measure sulphur compounds such as H2S, mercaptans and sulphides. 2 models are available, MEDOR Exp ppm, for measured in the ppm range, and MEDOR Exp ppb for measurement in the ppb range.

The analyser, which will operate automatically and continuously, is enclosed in an Ex rated cabinet, controls its own flow, pressure and dilution. The Zone 1 version includes a flow controller at the valve outlet to validate glow from the cabinet.

The cabinet also has an IP66 rating, making it waterproof, and it is also protected from dust contamination. This protection from external elements reduces the amount of air required for continuous dilution.

MEDOR Exp also complies to the ASTM D7493-08 method for online measurement of sulphur compounds in natural gas and gaseous fuels by GC and electrochemical detection,

Chromatotec also offers the chromaTCD for process analysts of pure gas and chromaENERGY for C1 - C6 and calorific measurement.