ChromaTHC Total Hydrocarbon Analysis System

Description:
The CHROMA THC is an automated isothermal industrial gas chromatograph designed for the analysis of Volatile Organic Compounds (VOCs) in air, including indoor, outdoor, and combustion environments, as well as industrial hygiene and pure gases like N2/CO2/O2.

Principle:

• The CHROMA THC operates fully automatically, enabling 24/7 unattended operation after initial setup.
• Sample injection is performed via a loop and valve system within an isothermal oven maintained at 80°C.
• Separation between CH4 and NMTHC is achieved using columns with a backflush mechanism.

Key Features:

• No matrix effects: There are no interferences from oxygen concentration or variation on measurements due to complete speciation between O2 and CH4.
• Flame stability: A valve regulates the hydrogen carrier gas, eliminating flame fluctuation issues.
• High accuracy: Retention time drift is less than 0.3%.
• FID detection: The instrument includes a flame ionization detector (FID) heated to 150°C with auto-ignition capability.
• Automatic calibration: Equipped with a valve for automated calibration.

CHROMA THC Configurations:

• 2MIN: Standard version for VOC monitoring in ambient air, providing results in 2 minutes (range: 20 to 20,000 ppb).
• 1 ppb: Suitable for cleanroom environments, tracking VOCs in ambient air.
• OCU: A solution for odor control unit manufacturers, complete with an analyzer, computer, and gas generators in a wall-mounted box. The system includes an SMS function to notify when media support is saturated.

VISTACHROM® Software:
The advanced VISTACHROM Chromatotec® software offers:

• Remote monitoring and injection control.
• Full traceability with onboard archiving of results and chromatograms.
• Quality control setup and threshold alarm management.
• Data export via MODBUS / 4-20mA / 0-10V.
• Timestamped results.

Options:

• Automatic validation (CALIB): Internal automatic calibration and data validation using a permeation tube.
• External calibration: Calibration using an external gas cylinder.
• Data transmission: Automated data transfer via a module with 4 outputs (4-20mA) / MODBUS TCP IP / MGS1.
• Odor modeling: Integration with weather stations for real-time odor/chemical impact analysis.
• 24 V DC power supply.
• Stream selector: Supports up to 16 streams with a single analyzer.
• Hydrogen and zero air generator.
• Heated sampling line: For industrial or CEMS applications.
• Vacuum sampling pump.
• Calculation modules: For average, statistics, odor index, odor unit (ouE/m3), and more.
• Liquid sampling: Module for TVOC analysis in water or other liquid samples.
• 3G Modem: Includes automatic SMS alerts.
• CHROMA THC 5U (reference C24022-OCU): All-in-one wall-mounted unit with an internal computer, CALIB, H2, and zero air generator included. Requires pressurized dry air (optional compressor available).
• XXvalveHC sampling system: For high VOC concentrations ranging from 100 ppm to % levels.

Note:
A single supervisor unit can control up to three Chromatotec® analyzers.