Pipeline Natural Gas Hydrogen Sulfide Odorant Content Analyzer

Detection Items:

Natural gas components such as oxygen, nitrogen, methane, ethane, propane, butane, carbon dioxide, hydrogen sulfide, total sulfur, etc., to calculate indicators like gas calorific value, density, molecular weight, and vaporization rate. In addition to the above components, it can also measure oxygen, carbon monoxide, isobutane, normal butane, isopentane, normal pentane, and specified C6+ gas components. The GC-7900 provides solutions for gas detection in the energy sector. We use specialized chromatographic columns for natural gas hydrogen sulfide and tetrahydrothiophene analysis, an FPD flame photometric detector, imported PTFE sampling valves for injection, and PTFE tubing to replace all gas paths.

Implementation Standards:

GB/T 11062-2014 "Calculation Method for Calorific Value, Density, Relative Density, and Wobbe Index of Natural Gas"

GB/T 13610-2014 "Analysis of Natural Gas Composition by Gas Chromatography"

Pipeline Natural Gas Hydrogen Sulfide Odorant Content Analyzer

Main Technical Specifications:

● Modular design with a compact and rational structure, offering multiple expansion functions for accurate and rapid analysis.

● Equipped with a 5.7-inch LCD screen for rich and intuitive display content, simplifying human-machine interaction. Supports both Chinese and English language modes to meet diverse customer needs.

● Utilizes an advanced microcomputer control system, enabling full control and analysis on a PC. Optionally equipped with a built-in AD conversion circuit for direct digital output of chromatographic signals.

● Features 6 control modules, each with temperature control ranging from room temperature to 400°C, increment: 1°C, accuracy: ±0.1°C.

● Includes over-temperature protection; if any temperature control system exceeds the set protection value, it automatically cuts off power to prevent hazards due to temperature loss.

● Intelligent flexible rear door design for more precise temperature control.

● Supports 9-stage programmed temperature rise to meet complex sample analysis requirements.

● Temperature programming rate: 0.1～40°C/min.

● Multiple injection methods available: on-column injection, split/splitless injection, packed column injection, gas valve injection, headspace injection, thermal desorption injection, purge and trap injection, flash evaporation injection, etc.

● 20L large column oven, laying the foundation for multidimensional chromatographic analysis.

● External control event module, capable of supporting multi-valve and multi-column switching systems, enabling complete analysis of complex gas components with a single injection. Facilitates automated instrument operation.

● Supports installation of up to 3 detectors (FID, TCD, ECD, FPD, NPD) and can be equipped with a methane converter.

●Injection initiation: manual or automatic option; when automatic injection is selected, it can simultaneously initiate programmed temperature rise.

● Column oven dimensions: 28mm×28mm×27mm (length*depth*height)

● Instrument dimensions: 635mm×580mm×50mm (length*depth*height)

Detector Technical Parameters:

Thermal Conductivity Detector (TCD)

● Sensitivity: S≥3500mV?ml/mg

● Baseline noise: ≤0.02mV

● Baseline drift: ≤0.15mV/h

● Linear range: ≥10^5

     ● Maximum operating temperature: ≤400°C

Flame Photometric Detector (FPD)

● Detection limit: (S)≤5×10^-13g/s; (P)≤1×10^-13g/s (

● Baseline noise: ≤0.03mV

● Baseline drift: ≤0.2mV/h

● Linear range: ≥10^3 (S), 10^2 (P)

Nitrogen Phosphorus Detector (NPD)

● Detection limit: (N)≤1×10^-13g/s; (P)≤5×10^-14g/s  (

● Baseline noise: ≤0.03mV

● Baseline drift: ≤0.2mV/h

● Linear range: ≥10^2 (N), 10^3 (P)