Product Overview
The EXPEC 3200 (Model:115Pro) Portable Total Hydrocarbons (THC), Methane (CH₄) and Non-Methane Total Hydrocarbons (NMHC) Analyzer is based on gas chromatography with flame ionization detection (GC-FID). The instrument is fully compliant with the standards:
HJ 1332-2023 Stationary Source Emissions—Determination of Total Hydrocarbons, Methane and Non-Methane Total Hydrocarbons—Portable Gas Chromatography–Flame Ionization Detector Method and
HJ 1012-2018 Technical Requirements and Test Methods for Portable Analyzers for Total Hydrocarbons, Methane and Non-Methane Total Hydrocarbons in Ambient Air and Exhaust Gas.

EXPEC-3200 Portable Methane/NMHC Detection System Technical Specifications
Detector Heat miniaturized hydrogen flame ionization detector (FID)
Detection Limit ≤0.1 ppm
Repeatability Qualitative Repeatability: ≤0.5%
Quantitative Repeatability: ≤2.0%
Measurement Range 0~30000 ppm
Analysis Cycle ≤2 min (NMHC)
Sampling Probe Temperature Adjustable between 0-180 degrees Celsius
Sample Gas Flow Rate Not less than 0.6L/min
Carrier Gas 75ml in-built high-pressure cylinder gas supply, as well as a hydrocarbon air remover, can be repeatedly recharged after being discharged.
Hydrogen 75ml in-built high-pressure cylinder gas supply, can be repeatedly recharged after being discharged, has an option of changing to hydrogen storage alloy.
Standard Gas 75ml built-in high-pressure cylinder gas supply, can be repeatedly recharged after being discharged.
High Pressure Gas Cylinders Gas cylinder pressure resistance can exceed 1800psi, can be used for more than 3 hours when the pressure is initially 2000psi, takes less than 5s to charge.
Battery Requirement Battery supply (24V, 19.2Ah) or adapter powered (220VAC, 50Hz)
Size and Weight 413×251×348 mm; 10kg
Versatile Applications Across Industries
Environmental inspection and law enforcement for organized and unorganized NMHC emissions
Self-monitoring of NMHC emissions by enterprises with organized and unorganized discharge
Acceptance testing and comparison of online NMHC monitoring systems
VOCs source tracing and investigation
Performance evaluation of VOCs treatment facilities
Other applications involving non-methane total hydrocarbon (NMHC) monitoring
Key Features of EXPEC-3200 Portable Methane/NMHC Detection System
High Integration · Ultra Portability

The main unit (including gas cylinder and battery) weighs less than 9 kg, only 50% of the weight of similar products.
All-in-one industrial design with a reinforced carrying handle and backpack, allowing easy hand-carrying or back-mounted transport for single-operator field measurements.
Chromatogram Traceability

Displays and automatically records sample chromatograms, enabling convenient post-analysis data quality control and traceability.
Long-Lasting Operation, Reliable Gas and Power Supply

Gas Supply: Built-in zero-grade air generator module eliminates the need for external support gas; hydrogen is supplied by a water-based hydrogen generator.
Power Supply: Built-in replaceable lithium battery supports AC 220 V power or hot-swappable battery replacement, providing more than 8 hours of continuous operation.
Optional Portable Flue Gas Moisture, Temperature, Pressure, Flow, and Oxygen Analyzer

Simultaneously measures flue gas moisture content, oxygen concentration, temperature, pressure, and flow rate, with results directly comparable to emission standards.
Built-in Multipoint Calibration Curves

Multipoint correlation coefficients are integrated into the curves for easy on-site use and convenient quality control.