Accurate, Cost-Effective Chemical Analysis and Monitoring

Advanced Chemical Sensors, Inc.
Technical Information Sheet

BTEX + Saturated Hydrocarbons Vapor Monitor
Catalog No. OV-095

The Monitor will measure the actual concentrations of petroleum-based solvents such as benzene, toluene, ethyl benzene, xylene, and saturated hydrocarbons in the series from pentane to dodecane.


Minimum Levels of Detection (Based on an 8 hour Exposure Time)

  ppm micrograms/cubic meter
Benzene 0.02 50
Toluene 0.03 110
Ethyl Benzene 0.03 130
Xylene 0.03 130
Total Saturated Hydrocarbons 0.1 375

(Total saturated hydrocarbons are usually reported as Hexane equivalent. Individual chemicals such as pentane, hexane, heptane, octane, etc can be reported.)


Minimum Levels of Detection (Based on an 24 hour Exposure Time)

  ppm micrograms/cubic meter
Benzene 0.007 17
Toluene 0.01 37
Ethyl Benzene 0.01 43
Xylene 0.01 43
Total Saturated Hydrocarbons 0.03/td> 125

(Total saturated hydrocarbons are usually reported as Hexane equivalent. Individual chemicals such as pentane, hexane, heptane, octane, etc can be reported.)

For an exposure time of 48 hours the minimum levels of detection are 1/2 of the values reported for a 24 hour exposure.


Exposure Limits: OSHA-TWA (ppm) OSHA-STEL (ppm)
Benzene 1 5
Toluene 200 C 300
Ethyl Benzene 100 None
Xylene 100 None
Total Saturated Hydrocarbons 500 None

C: Ceiling Limit


Sampling Medium: Activated High-Purity Carbon Molecular Sieve
Method of Analysis: Gas Chromatogratphy
Recommended Sampling Time: 15 minutes to 48 hours
Interferences: No interferences are known.
Effect of Temperature: Less than 10% for each 10 °C variation from 24 °C
Effect of Humidity: No effects detected at 30% RH to 92% RH.
Storage Conditions: Maximum shelf life one year.
Recommended Holding Time: Two weeks prior to analysis.
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