6500 VOCs analyzer is the analysis unit of VsCMS 6500 VOCs continuous monitoring system. It adopts the unique design of Deans Switch + double column separation + single FID to realize C2~C12 hydrocarbons monitoring with one instrument.

Nutech VsCMS 6500 VOCs Continuous Monitoring System – 57 PMAS Compounds Monitoring

For VOCs species analysis, Nutech provides continuous monitoring solutions based on different technologies (GC-FID, GC-FID/MS). The difference is that the analysis unit uses different analyzers. But because VOCs exist in ambient air at very low concentration (ppb or even ppt level), all these solutions need our innovative LTP technology to realize pretreatments like impurities removal and sample enrichment.

VsCMS 6500 is mainly used for the continuous monitoring of PAMS compounds in ambient air, which consists of sampling unit, analysis unit (including pretreatment), data collection and transmission unit, quality control unit, gas source unit and other auxiliary equipment.

Technical Data

Detection Method: LTP+GC-FID

Detection Limit: <0.1ppb

Precision: RSD<5%

Zero Noise: ≤0.05nmol/mol

Sampling Flow Rate: 5-120ml/min (Customizable)

System Residue: ≤0.1nmol/mol (90% Species)

Data Interface: 4~20mA,0~5V DC,RS232, ethernet port

Adsorption/Desorption Temperature: -10℃~350℃ (Adjustable)

Accuracy: ±10%

Maximum Temperature Rise Rate: 100℃/Sec

Temperature Control Precision: ±2℃

Working Gases:99.999% N2 (carrier gas, makeup), 99.999% air (combustion gas), 99.999% H2 (fuel gas)

Working Conditions: Temperature 10°C~40°C; RH: 20%~90%

Voltage: 110V/60Hz or 220V/50Hz±10%

Features

1. The innovative design of “doble column separation + Dean Switch + single FID” realizes full PMAS compounds analysis, and can report NMHC/TVOC concentration at the same time. A single instrument can meet the needs of high (C6 -C12) and low (C2 -C5 ) hydrocarbon monitoring, significantly reducing the cost of customers compared to the “high-carbon analyzer + low-carbon analyzer” solution.

2. The unique low temperature (-30°C) preconcentration technology effectively concentrates the target compounds to be measured and realizes rapid thermal desorption, which greatly improves the lower detection limit and meet the detection requirements of VOC species in low or ultra-low concentration air.

3. Cryogenic water treatment technology effectively removes water and CO2 from the sample air, which greatly improves the peak shape, extends the column life and avoids FID flameout.

4. With an FID detector, the instrument achieves good responses and a wide linear range.

5. The FID detector has real-time self-check function, can judge the working status, and can automatically ignite after flameout.

6. High precision MFC controls the sample gas and EPC controls the working gases like nitrogen, hydrogen and zero air. Precise control of the flow rate to ensure the accuracy of test results.

7. It has a reference analysis method (editable), and supports two quality control modes: quality control by online dynamic standard gas dilution and quality control by standard gas in SUMMA canister.

8. PC control, real-time data acquisition and transmission, automatic recording, storage, and support of QA/QC reports. With historical data (including atlas) query function, the system can automatically save and restore data if the power is cut off unexpectedly.

Chromatogram

Recommended Configuration for Complete Monitoring System

Besides the analysis unit (6500 VOCs analyzer), Nutech can offer the whole VOCs continuous monitoring system including the sampling unit, the analysis unit, the data collection and transmission unit, quality control unit, gas source unit and other auxiliary products.

ItemModelNote
Sampling Unit 
Sampling Tube (with heat tracing)NST100Standard and Customizable
Analysis Unit
VOCs Online Analyzer6500Standard, LTP+GC-FID, PAMS.
Data Collection & Transmission Unit 
Computer/IPCIPC-610Standard.
Data Collection UnitN6500 V1.0Standard.
Quality Control Unit  
Precision Dynamic Dilutor2202BStandard. Can be purchased locally.
Standard Gas – Internal Standard 4 SpeciesNSG-ISStandard. Linde.
Standard Gas – PAMS 57NSG-PAMSStandard. Linde.
Gas Source Unit
High Purity Hydrogen GeneratorNHG300Standard.
Zero Air GeneratorNAG1000Standard.
High Purity NitrogenNG-N2Standard. Purchased locally.
Other Auxilliary Equipment
Meteorological SensorNTPL100Optional.
CabinetN6837Optional. Customizable.

This table is the list of standard configuration of VsCMS 6500 VOCs species continuous monitoring system recommended by Nutech, which can be customized according to customer’s requirements.

Project Reference

PAMS Compounds List

Acetyleneo-Ethyltoluenen-Octane
Benzenem-Ethyltoluenen-Pentane
n-Butanep-Ethyltoluene1-Pentene
1-Butenen-Heptanecis-2-Pentene
cis-2-Butenen-Hexanetrans-2-Pentene
trans-2-Butene1-HexenePropane
CyclohexaneIsobutanen-Propylbenzene
CyclopentaneIsopentanePropylene
n-DecaneIsopreneStyrene
m-DiethylbenzeneIsopropylbenzeneToluene
p-DiethylbenzeneMethylcyclohexane1,2,3-Trimethylbenzene
2,2-DimethylbutaneMethylcyclopentane1,2,4-Trimethylbenzene
2,3-Dimethylbutane2-Methylheptane1,3,5-Trimethylbenzene
2,3-Dimethylpentane3-Methylheptane2,2,4-Trimethylpentane
2,4-Dimethylpentane2-Methylhexane2,3,4-Trimethylpentane
n-Dodecane3-Methylhexanen-Undecane
Ethane2-Methylpentaneo-Xylene
Ethylbenzene3-Methylpentanem-Xylene
Ethylenen-Nonanep-Xylene

Nutech VOCs Continuous Monitoring Products

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