a GC/PID for automatic monitoring of BTEX in air, water or soil

  • Model: AirTOXIC BTX PID
  • Manufacturer: Chromatotec


Real time monitoring of air pollutants (dust, gas)
Industrial Hygiene


This instrument uses a port valve with a single absorbent trap, and a 30 meter metallic 0.28 mm ID column.

Minimum detection level as low as 10 ppt for Benzene or 1,3-Butadiene (A76022) in ambient air.

Miniaturization, sensitivity, mobility and flexibility are its main features. Everything from the sample port up to the data storage is integrated in a 19″-rack 5U.

Programmed gradient temperature up to 202°C for the column oven and pressure/flow control of the carrier gas .

Linearity on area with R2 > 0.995

European range: 0.45 to 45 µg/m3 = 0.1 to 14.5 ppb.

Before delivery the analyser is tested for one week by our quality control department.

Photo ionisation detector (PID), 10,6 eV lamp.

Self-cleaning of the lamp ensures high stability.

Bi-directionnal RS-232 C to transfer data and results to the internal computer.

Vistachrom software enables the user to view and store data on an industrial computer. It provides user friendly utilities to recalculate, calibrate and export data and to configure the measurement.

The software allows the calculation of retention time, area, mass or concentration profiles, in any measuring unit.


Results output: different communication protocols available

CALIB included in A73022/-B MCERTS with Benzene Permeation tube Automatic validation and autocalibration


  • Exp cabinet option hazardous area ATEX zone 1, zone 2 or CSA
  • Class 1 Division 2 T3
  • Internal Multipoint calibration with CALIB and / or cylinder
  • Nitrogen generator up to 300 ml/min
  • Modem support and remote control
  • 4 or 8 analog outputs 4-20 mA or 0-10 V
  • 1,3-Butadiene ( A76022 or A73022-B)
  • Purge module to extract VOC from water for online BTEX analysis
  • Naphthalene in option


Feature Specification
BTEX Analysis Up to 8 compounds
– Included Benzene, Toluene, Ethylbenzene, Xylene (Ortho, Meta, Para), Cyclohexane, Styrene
– Optional 1,3-Butadiene and IAA
Lower Detection Limit (LDL) in Automatic Mode ≤ 0.01 ppb (0.0325 µg/m³)
Detection Range and Linearity for Benzene
– Default 3.25 to 3250 µg/m³ (0-1000 ppb)
– High Sensitivity 0.32 to 325 µg/m³ (0-100 ppb)
– Ultra High Sensitivity 0.032 to 32.5 µg/m³ (0-10 ppb)
Relative Standard Deviation (Precision)
– Retention Time Better than 0.3% over 48 hours
– Concentration Better than 2% over 48 hours at 1 ppb
Other Features Variable Cycle Time (15, 20, 30 minutes)



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