Insulated GC Analyzers

Insulated GC analyzers

The MOEORW-WEP75 is a gas chromatograph specifically designed for transformer oil , enabling precise detection of dissolved gas components in insulating oil.

EPC/EPC offers precise gas path temperature control, compatibility with multiple detectors, remote Ethernet control, and stable and efficient analysis.

It is suitable for component analysis in multiple fields such as power, petrochemical, environmental monitoring, industrial quality control and scientific research laboratories.

Gas chromatography is a technique for separating and analyzing multi-component mixtures. It mainly utilizes the differences in boiling point, polarity, and adsorption coefficient of the components in a sample within the chromatographic column to separate the components and perform qualitative and quantitative analysis on the separated components.

Transformer oil analysis gas chromatographs use gas as the mobile phase (carrier gas). When the sample is fed into the injector and vaporized, it is carried by the carrier gas into a packed column or capillary column. Due to the differences in boiling point, polarity, and adsorption coefficient of each component in the sample, the components are separated in the column. Then, the detector connected to the column detects each component in sequence according to its physicochemical properties. Finally, the data is sent to a chromatography workstation via network. The chromatography workstation records and analyzes the gas chromatograms of each component to obtain an analysis report.

● Operation display: 7-inch high-definition capacitive touchscreen

●Temperature control area: 8 channels

●Temperature control range: 3℃ above room temperature to 450℃, increment: 0.1℃, accuracy: ±0.01℃

●Number of temperature ramp-ups: 99

●Maximum heating rate : 120℃/min

●Gas circuit control : Fully electronic pressure and flow control

●Carrier gas control modes: pressure, flow rate, linear velocity, programmed pressure, programmed flow rate, programmed linear velocity

●Program stress/flow rate/linear velocity: 12th order

● Measuring range: Pressure: 0～0.6Mpa, Flow rate: 0～100mL/min or 0-1000mL/min

●Resolution: 0.001psi

●External events: 8 channels ; Auxiliary control outputs: 2 channels

●Types of injectors : packed column injector, capillary injector, six-way valve gas injector, autosampler

●Number of detectors : 4 (maximum); FID, TCD, ECD, FPD, NPD, PDHID, PED, etc.

●Injection start : Manual or automatic selectable

● Communication Interface: Ethernet: IEEE 802.3

1.3.2 Detector Technical Specifications

1. Flame Ionization Detector (FID)

● Detection limit: ≤1 × ^10⁻¹² g/s (hexadecane/isooctane)

● Baseline noise: ≤ 2 × ^10⁻¹⁴ A

● Baseline drift: ≤1 × ^10⁻¹³ A/30min

●Linear range: ≥10 ⁷

2. Thermal conductivity detector (TCD)

●Sensitivity: S≥10000mV•ml/mg (benzene/toluene) (with selectable amplification of 1, 2, 3, or 4 times)

●Baseline noise: ≤20μV

●Baseline drift: ≤30μV/30min

●Linear range: ^≥10⁵

3. Electron Capture Detector (ECD)

● Detection limit: ≤1× ^10⁻¹⁴ g/ml (gamma-hexane-isooctane solution)

● Baseline noise: ≤0.03mV

● Baseline drift: ≤0.2mV/30min

● Linear range: ^10⁵

● Radioactive source: 63Ni

4. Flame Photometric Detector (FPD)

● Detection limit: (S)≤2×10⁻¹¹ ^g /s

(P)≤1×10⁻¹² ^g /s; ( methyl parathion-anhydrous ethanol solution )

●Baseline noise: ≤3× ^10⁻¹³ A

● Baseline drift: ≤2× ^10⁻¹² A/30min

●Linear range: ≥10³ for sulfur ^{, ≥10⁴} for phosphorus

5. Nitrogen-Phosphorus Detector (NPD)

● Detection limit: (N) ≤ 1 × ^10⁻¹² g/s; (Azobenzene)

(P)≤1×10⁻¹² ^g /s; ( malathion )

●Baseline noise: ≤5× ^10⁻¹³ A

● Baseline drift: ≤2× ^10⁻¹² A/30min

●Linear range: ≥10 ³

★ It adopts advanced 100Mbps/Gigabit Ethernet communication interfaces and has a built-in IP protocol stack, enabling the instrument to achieve long-distance data transmission through the enterprise's internal LAN and the Internet; it facilitates laboratory setup, simplifies laboratory configuration, and facilitates the management of analytical data;

★ The instrument is equipped with a dedicated workstation that can support the simultaneous connection of multiple chromatographs, enabling data processing and reverse control of the instruments, and simplifying document management ;

★ The instrument can connect to the manufacturer via the Internet to enable remote diagnostics, remote updates, etc. (user settings required);

★ The display is a 7-inch high-definition capacitive touchscreen ;

★ The instrument adopts a multi-processor parallel operation mode, making it more stable and reliable; it can be equipped with a variety of high-performance detectors, such as FID, TCD, ECD, FPD and NPD, and up to four detectors can be installed at the same time to meet the analysis needs of complex samples.

★ The instrument adopts a modular structural design, making subsequent maintenance simple and convenient.

★ The brand-new microcomputer temperature control system has high temperature control accuracy, excellent reliability and anti-interference performance; it has eight completely independent temperature control outputs, can realize ninety-nine- level programmable temperature rise, has an automatic rear door opening system for column box, improves near room temperature control capability, and has a faster heating/cooling speed;

★ The instrument is equipped with advanced electronic flow control unit (EFC) and electronic pressure control unit (EPC) to realize digital control of the gas path, which greatly improves the stability of the instrument and the reproducibility of the analysis results;

★ The chromatograph has a built-in low-noise, high-resolution 24-bit AD circuit and features baseline storage and baseline subtraction functions.

★ The standard workstation is compatible with operating systems such as WinXP, Win2000, Win7, Win8, and Win10.

★ The chromatograph microcomputer system with completely independent intellectual property rights has the standard MODBUS/TCP protocol and can be connected to the DCS system .

√ Detection of dissolved gases and fault characteristic components in transformer oil in the power industry helps identify latent faults in transformers and ensures the safe operation of power equipment.

√ Petrochemical oil component analysis, production process quality monitoring, and raw material and finished product purity testing.

√ Trace analysis of volatile organic compounds and organophosphorus/sulfur pollutants in water and soil for environmental monitoring .

√ Detection of pesticide and solvent residues in food and pharmaceuticals ; purity analysis of pharmaceutical intermediates and raw materials.

√ Industrial quality control and scientific research: quality inspection of chemical products, laboratory research, and online monitoring of production processes.