Benzene / Btex Analyzer

 Monitoring of benzene, toluene, ethylbenzene, xylenes (BTEX) and other hydrocarbons in ambient air.The Vair-9013 Series BTEX analyser is built for the  measurement of benzene, toluene and xylene isomers in ambient

           Hydrocarbon Selection

Benzene is a carcinogenic compound and it is harmful already in very low concentrations; there is no absolute safe concentration limit for benzene.By CPCB   regulations, measurement of benzene in ambient air is obligatory. The yearly mean value must be below 5µg/m3. The concentration of benzene inambient air varies from under 0.1 to above 100 micrograms per m3.

   Benzene in ambient air is coming from evaporated fuel, either from gas filling stations or from cars. Furthermore, it is emitted by cars by burning fuel andfrom other    burning processes like bio fuel heating or forest fires.Toluene, Ethylbenzene and o-, m-, p-Xylene are standards that are included in the analyser configuration. This group

                 Measuring Principle

  The Vair-9013 Series BTEX analyser can measure up to 40 components.With different settings and suitable calibration gas it is possible to measure components like  octane, chloroethenes, trimethylbenzenes in one 30-minute run. Data processing and communication are prepared for this.The customer can also specify a list of  components that have to be measured and Vasthi can include those compounds in the settings of the system. The customer needs to buy the suitable calibration gas to check this and calibrate the system.

                Hydrocarbon Selection

   Benzene / Btex Analyzer  instrument is a gas chromatograph with a built-in pre-concentration system. Hydrocarbons are pre-concentrated on Tenax GR, desorbed thermally, and separated in an appropriate column to reach optimal separation from interfering hydrocarbons.

 .Alternative columns are available for special applications. Analysis is done by a photo ionization detector (PID). This ensures highly specific sensitivity for benzene and  aromatic hydrocarbons in general.A standard industrial PC, running under Windows, is used. The user-friendly software stores all the chromatograms on the hard disk and data can be interpreted easily with this intuitive software. Data can also be transferred by network and modem connection. Besides this, analogue and digital output options are available to communicate with other data logging systems using several data protocols.

  Simple operation, good reliability and low maintenance costs are important to us. With a worldwide network of trained distributors the end-user can be sure that the  analyser comes with an individualized training and that local support is available when needed. Vair-9013 consumes a small quantity of nitrogen as carrier gas.

 Preventive maintenance is only required once a year. For good data quality it is recommended to have a regular (automatic) calibration or validation. In the software an automatic multipoint validation/calibration is possible using calibration gas of one concentration per component by using different volumes of air passing over the pre-concentration trap. The expected lifetime of the analyser is 10 years. Consumable parts are economically priced.

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