Ecotech supplies analyzers for the measurement of benzene, toluene, xylene, ethylbenzene and a variety of other hydrocarbons. These instruments are utilized in ambient air networks around metropolitan areas and fence-line monitoring at industrial sites.

Features

• Direct measurement of Benzene, Toluene, Ethylbenzene, and Xylene's in Ambient Air
• Interference free response
• Automatic calibration for unattended operation
• Automatic baseline adjustment for long-term stability
• Optional analog ouputs of Benzene, Toluene, Ethylbenzene, Xylene's and detector signal
• Analog output ranges are user selectable
• Graphic display of current and historical concentrations
• Multipoint sampling options

The monitoring of BTEX & other hydrocarbons is of importance in a number of different application that include:

• Ambient Air Monitoring
• Industrial hygeine and safety monitoring
• Fenceline monitoring around industrial sites

The BTEX analyser employs a photoionization detector (PID) as the sensing element. This detector is specific to volitile organic compounds. The Benzene, Toluene, Ethylbenzene, and Xylene's in the gas sample are physically separated using proprietary GC columns.

A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the BTEX and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. Benzene, Toluene, Ethylbenzene, and Xylene's are separated from potentially interfering components on the analytical column and elute to the detector for analysis.