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HUAYI: Professional Dissolved Gas Analyzer Manufacturer

Wuhan HUAYI Electric Power Technology Co.,Ltd. (HUAYI for short) is a professional manufacturer in China, researching and manufacturing electric testing equipment. HUAYI insist developing and marketing independently, and make efforts to improve the products quality, reduce cost, and improve efficiency.

Oil Chromatography Test Set

Why Choose Us

Rich Experience

The company was established in 2005 and has more than ten years of professional experience. It is one of the earliest manufacturers of high-voltage testers in China.

Professional Technology Support

Specialize in testing and solutions for more than 18 years. Own experienced engineers. Professional on delivery, installation, debugging, and training.

ISO Certification

We have a professional R&D technical team and strict quality control to ensure safety, accuracy and efficiency. Passed ISO9001 certification and obtained relevant patent certificates.

24 hours After-sales

Professional after-sales service, paying attention to customers' feedback about products; Providing solutions within 24 hours, if the customers have any problem; Act quickly and efficiently.

Product Parameter

Network anti-control system	Internal CAN's way, with interface board design, It can be converted to network port output at will
Signal output bits	24-bit
Communication interface	Network interface output(class 6 network cable connections)
Circuit design	ARM embedded design for easy wireless control, remote control and mobile app control
Temperature control system	Six-way independent temperature control
Temperature control	Room temperature - 450 ℃, liquid nitrogen refrigeration: - 80 ℃ - 450 ℃
Column box temperature control accuracy	-0.02℃
Program heating up	Stage 13, 0.1 ℃ / stage
Show module	Large-screen LCD
Display accuracy	0.01 ℃
Lift rate of column and box	0-80 ℃ / min (adjustment increment 0.1 ℃ / min) up to 120 ℃ / min
Temperatu reprogrammed repeatability	≤1%
TCD Detector Sensitivity	S value ≥ 10000mv.ml/mg (benzene) )up to 12000 mv.ml/mg (benzene)
Baseline noise	≤ 8uv
Baseline Drift	≤20uv/30min
Detection limit of FID detector	≤3 x 10-12g/s(thanan)
Baseline noise	≤2 x 10-13A
Baseline Drift	≤5 x 10-13A
Detection limit of ECD detector	≤3 x 10-14g/s(r-666)
Baseline noise	≤1 x 10-13A
Baseline Drift	≤5 x 10-13A
Detection limit of FPD detector	≤2 x 10-11 g/s(Sulfur in methyl parathion)
Baseline noise	≤2 x 10-13A
Baseline Drift	≤4 x 10-13A
Extended	≤6 external events can be added
Automation engineering	Can be increased: automatic ignition function, automatic sampler connection, four-way flow pressure display function, optional counter-control workstation to achieve counter-control

Key Gases Analyzed in Dissolved Gas Analyzer

Hydrogen (H2): Indicates arcing or partial discharge within the transformer.
Methane (CH4): Suggests thermal faults.
Ethane (C2H6): Associated with overheating.
Ethylene (C2H4): Indicates severe overheating or hot spots.
Acetylene (C2H2): Points to high-energy arcing.
Carbon Monoxide (CO) and Carbon Dioxide (CO2): Indicate cellulose degradation.
Oxygen (O2) and Nitrogen (N2): Reflect oil quality and air presence in the transformer.

Advantages of Dissolved Gas Analyzer

01/

Real-Time Analysis
One of the most significant advantages of a dissolved gas analyzer is its ability to provide real-time analysis. In critical situations, this feature can be a game-changer, enabling immediate, data-driven decisions.

02/

Timely Decision-Making
The rapid analysis capabilities of a dissolved gas analyzer empower asset owners to make timely decisions. Whether it’s deciding to take a transformer offline for maintenance or planning proactive measures to address emerging issues, the ability to access up-to-the-minute data is invaluable.

03/

Precision and Calibration-Free Operation
Dissolved Gas analyzers incorporate advanced technologies like Photo-acoustic spectroscopy (PAS) for gas measurement. What’s more, these devices are often calibration-free, reducing the need for frequent calibration checks.

04/

User-Friendly Design
Dissolved gas analyzers are designed with the end user in mind. They feature intuitive interfaces and user-friendly controls, simplifying the testing process.

05/

Extended Transformer Longevity
By facilitating timely decision-making and proactive maintenance, dissolved gas analyzers contribute to extending the operational lifespan of transformers. This, in turn, maximizes the return on investment and ensures reliable power distribution.

06/

Versatile
Their portability makes them ideal for field use, even in remote or challenging locations. This versatility ensures that transformer health can be assessed wherever it’s needed.

Methods of Dissolved Gas Analyzer Testing

DGA testing can be performed using various methods, each offering different levels of accuracy and detail:

Gas Chromatography (GC)

Gas chromatography is the most commonly used method for DGA testing. It involves separating the dissolved gases in the oil and quantifying them using a gas chromatograph. This method provides precise measurements of individual gas concentrations.

Online DGA Monitors

Online DGA monitors are installed on transformers to provide continuous monitoring of dissolved gases. These monitors offer real-time data and can trigger alarms when gas levels exceed predefined thresholds.

Vacuum Extraction Method

The vacuum extraction method involves extracting dissolved gases from the oil under a vacuum and then analyzing them using gas chromatography. This method is particularly useful for transformers with low gas concentrations.

Headspace Gas Analysis

In headspace gas analysis, a sample of the gas above the oil (the headspace) is analyzed. This method is faster but may be less accurate than direct oil sampling methods.

Application of Dissolved Gas Analyzer

Utilities & Power Generation
Utilities rely heavily on dissolved gas analyzers to monitor transformers and prevent failures. Early detection of gases like hydrogen can signal internal faults, allowing maintenance teams to intervene before catastrophic failures occur.

Manufacturing & Industrial Facilities
Factories with large electrical infrastructures use dissolved gas analyzers to ensure continuous operations. For example, a steel plant might deploy DGAs to monitor transformers that power heavy machinery, preventing unplanned outages that could halt production lines.

Renewable Energy Installations
Wind and solar farms increasingly incorporate dissolved gas analyzers to maintain their power conversion equipment. Detecting early signs of insulation degradation helps extend equipment lifespan and optimize performance.

Oil & Gas Sector
Dissolved gas analyzers are used in offshore platforms and refineries to monitor transformers and other electrical systems, ensuring safety and operational efficiency in challenging environments.

Usage Requirements

Follow laboratory safety protocols, including proper ventilation, grounding, and use of personal protective equipment (PPE).

Transformer oil samples must be collected in clean, airtight containers to prevent gas contamination or loss before analysis.

Analyzers must be calibrated before and after use. This means the device needs to be adjusted according to the manufacturer's specifications or instructions in the manual.

Only trained and authorized personnel should perform sampling, testing, and data interpretation.

After using the analyzer, ensure that it is stored properly away from direct sunlight, excessive heat, cold, or moisture.

The equipment should be operated in a temperature- and humidity-controlled environment to ensure accurate readings.

Supporting Accessaries

Serial Number	Name	Amount	Serial Number	Name	Amount
1	Quantitative clamp	One	14	Output signal line	Two
2	Polyethylene gas pipe	Thirty meters	15	Nipper pliers	One
3	Gas injector	One	16	Screwdriver	One
4	Pneumatic nut	One	17	Small screwdriver	One
5	Gas circuit gasket	Twenty	18	Wrench (12*14)	Two
6	Graphite pad Φ3.1	Eight	19	Wrench (8*10)	One
7	Graphite pad Φ5.1	Four	20	Screw (M3*6)	Ten
8	Injector seal	Thirty	21	Flat (Φ3)	Ten
9	Gas path	Three	22	Copper mesh (Φ3)	One
10	Gas tee	Four	23	Combined grounding wire	One
11	Column nut	Four	24	Specification	One
12	Fuse (2A, 8A)	Six	25	Inspection Report	One
13	Fuse plate	Two	26	Certification	One

How To Cooperate With Us

Inquiry: You can contact us online or sending us an inquiry. Please provide the details of your requirements as clear as possible. So we can send you the offer at the first time.
Phone Number: (+86)-18062012971/whatsapp:+8618064115448
E-mail: sales@sinohipot.com/ tina@sinohipot.com

Custom Plan Development: During the consultation, we’ll evaluate your specific requirements and together, craft a custom quality assurance plan tailored to your needs.

Agreement and Setup: Once you’re satisfied with the plan, we’ll finalize the details and set up everything needed to get started.

Quality Assurance Implementation: Our team will then implement the quality assurance protocols on your selected products or processes.

Delivery: Deliver cargos by sea or by air according to requirement.

Packaging and Delivery

Packing detail:	Packing with wooden cases, provide different solutions of shipping way.
Payment:	We accept many payment term, such as T/T, Western Union, L/C.
Warranty period:	One-year warranty, Installation, and commissioning of specific products.
Delivery time:	Most of our products are in stock and can be delivered upon payment. The delivery time usually does not exceed 15 days.

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Our Certificates

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FAQ

Q: When can I get the price?

A: Usually we quote within 24 hours after we get your inquiry.

Q: What is your minimum order quantity, can you send me samples?

A: Our minimum order quantity is 1 set, and the sample shipping fee needs to be provided by you.

Q: Do you have the products in stock

A: Most Of our tester has stock.You can contact us to make sure

Q: Is there the products tested before shipping?

A: Our products undergo factory testing and are accompanied by reports.

Q: Would you have a discount?

A: Yes we could offer different discount according to your order quantity. We also hold regular promotional activities every year.

Q: Have your products been exported?

A: We have more than 10 years of export experience. Please contact us to confirm if there is a local partner.

Q: What about the transportation?

A: Usually we take door to door express delivery ,cause it's more convenient and fast.

Q: How It Works?

A: Sample Collection: The device collects a small sample of transformer oil, either manually or automatically, depending on the system design.
Gas Extraction: The sample is processed to extract dissolved gases, often through a sealed chamber or a dedicated sampling port.
Gas Analysis: The extracted gases are analyzed using sensors or spectroscopic methods. Technologies like infrared spectroscopy identify specific gases based on their absorption spectra.
Data Processing: The analyzer converts raw sensor data into concentration levels of each gas, often providing real-time readings.
Reporting & Alerts: Results are displayed on dashboards or sent via alerts if gas levels indicate potential faults, such as overheating or arcing.
Trend Monitoring: Continuous or periodic data collection helps track changes over time, enabling predictive maintenance strategies.

Q: What is a dissolved gas analyzer?

A: A dissolved gas analyzer is an instrument used to detect and quantify gases dissolved in transformer insulating oil. It helps monitor transformer health and identify potential faults by analyzing the composition and concentration of gases such as hydrogen, methane, ethylene, and acetylene.

Q: Why is DGA important for transformers?

A: Early Fault Detection: DGA allows for the early detection of faults such as arcing, overheating, and insulation degradation. By identifying these issues before they lead to catastrophic failures, DGA helps in preventing transformer outages and extending the equipment’s lifespan.
Improved Reliability and Safety: Regular DGA testing improves the reliability and safety of transformers by ensuring potential issues are addressed before they lead to failures.

Q: How are gases dissolved in transformer oil?

A: When electrical discharges or overheating occur inside the transformer, the insulating oil and cellulose insulation decompose, producing gases. These gases dissolve into the oil and can be extracted and measured using a DGA system.

Q: How is gas extraction performed in DGA?

A: Gas extraction can be achieved through methods like vacuum extraction, headspace equilibrium, or stripping with an inert gas (e.g., nitrogen). The extracted gas is then analyzed to determine its composition.

Q: What is the typical maintenance schedule for a DGA analyzer?

A: Maintenance typically includes periodic calibration (every 6–12 months), checking oil flow systems, replacing filters, and verifying sensor accuracy.

As one of the most professional dissolved gas analyzer manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy cheap dissolved gas analyzer made in China here from our factory.

Dissolved Gas Analyzer