Dual Canopy Mechanic Electrical Engineering Co., Ltd. is one of the leading manufacturers and suppliers of trace moisture analyzer in China. Please feel free to wholesale discount products for sale here and get quotation from our factory. Customized orders are welcome.
What Is a Trace Moisture Analyzer?
A trace moisture analyzer measures water vapor at concentrations most instruments cannot resolve-typically from 0.1 ppm up to 3,000 ppm in gases, liquids, and solid dielectric materials. In high-voltage applications, these numbers matter because moisture is disproportionately destructive relative to its concentration.
Transformer oil illustrates the problem clearly. IEEE Std C57.106-2015 notes that dissolved moisture around 30 ppm can depress dielectric breakdown voltage by more than half. The mechanism is straightforward: water molecules polarize under alternating electric fields, creating localized conduction paths that eventually tree into full breakdown channels. The oil itself may look clear and test normally for acidity, yet harbor enough moisture to compromise the entire insulation system.
SF₆-insulated switchgear faces a different threat. At commissioning, IEC 60376 limits moisture to 150 ppmv because arc energy dissociates water into hydrogen and oxygen, which then recombine with sulfur and fluorine from the SF₆ to form hydrofluoric acid. That acid attacks metal-oxide surfaces and epoxy spacers, producing conductive byproducts that degrade insulation over months or years. The damage is often invisible until a partial discharge test flags it, by which point the GIS chamber may need extensive reconditioning.
What advantages does the product have that can benefit users?
The Karl-Fischer coulometric method remains the benchmark for trace moisture determination across a range of materials. The SGWS-2 implements this approach using a 32-bit embedded microprocessor running a Linux operating system, which handles the control logic and data processing.
The hardware includes a precision program-controlled current source that generates iodine electrochemically during titration. This allows the instrument to resolve moisture levels down to the parts-per-million range with reasonable speed. A color touchscreen with a digital keyboard handles parameter entry and displays results, while a built-in micro thermal printer timestamps each record for later retrieval. Four calculation formulas are available to accommodate different sample types and reporting requirements.
The unit connects to external computers via standard interfaces for data upload and remote operation. It sees use in petroleum labs, chemical manufacturing, power utilities, and other settings where moisture control affects product quality or equipment reliability.</think>The Karl-Fischer coulometric method has been the reference for trace moisture since the 1950s, and it has not been displaced because nothing else matches its specificity. The SGWS-2 runs this chemistry under microprocessor control, with a Linux-based system handling the sequencing and arithmetic.
The titration itself is driven by a precision current source that generates iodine at the electrode surface rather than adding it from a burette. That electrochemical generation is what makes the method self-contained and capable of resolving single-digit parts per million. The operator enters sample parameters through a color touchscreen, watches the titration curve build in real time, and gets a timestamped printout from the internal thermal printer. Four built-in calculation routines handle different sample matrices-transformer oil, lubricants, solvents, solids-without requiring manual formula entry.
Data export goes through standard serial or USB interfaces to a PC for archiving or LIMS integration. The environments where this matters are predictable: petroleum labs certifying product dryness, chemical plants controlling reaction moisture, power utilities tracking transformer oil condition. In each case, the measurement is not just a quality checkpoint but a decision point that determines whether the material stays in service or gets reconditioned.
Where Is the Trace Moisture Analyzer Used?
| Application Scenario | Target Medium | Typical Moisture Range | Governing Standard |
|---|---|---|---|
| SF₆ Gas-Insulated Switchgear (GIS) commissioning & maintenance | SF₆, N₂, CF₄ | 1–1,000 ppmv | IEC 60376, IEC 60480 |
| Power Transformer oil quality assessment | Mineral oil, natural/synthetic ester | 1–200 ppm (Karl Fischer equivalent) | IEEE C57.106, IEC 60814 |
| Gas-Insulated Transmission Line (GIL) integrity testing | SF₆/N₂ mixtures | 5–500 ppmv | IEC 62271-204 |
| Cable oil & HVDC converter transformer insulation fluids | Dodecylbenzene, silicone oil | 1–100 ppm | ASTM D7546 |
| Hydrogen-cooled generator seal gas monitoring | H₂, CO₂ | 0.1–500 ppmv | IEEE Std 67 |
| Compressed air / instrument air quality in substations | Dry air | 1–2,000 ppmv | ISO 8573-3 |
| Laboratory & R&D quality control | Various carrier gases | 0.1–3,000 ppmv | ASTM E700-15 |
What does the importance of safety during use entail?
| No | Precaution | Reason |
|---|---|---|
| 1 | Never exceed the rated inlet pressure (0.8 MPa standard / 1.6 MPa optional). Use the supplied pressure gauge at the inlet. | Over-pressure can damage the sensor diaphragm and void the warranty. |
| 2 | Do not expose the sensor to liquid water or oil splash. If testing oil headspace, always use the vapor extraction adapter (included). | Liquid contact causes irreversible swelling of the Al₂O₃ nano-pore structure. |
| 3 | Purge thoroughly before each measurement. Minimum 3 minutes at 0.5 L/min. | Residual ambient moisture in tubing (typically 10,000–20,000 ppmv) will cause falsely high readings. |
| 4 | Store with desiccant caps on inlet and outlet ports. | Even during storage, slow diffusion of ambient moisture can saturate the sensor, increasing warm-up time at next use. |
| 5 | Operate within the specified temperature range (–20 °C to +55 °C). | Below –20 °C, the LCD response time degrades; above 55 °C, sensor calibration accuracy is not guaranteed. |
| 6 | Recalibrate annually or after 8,000 hours of cumulative operation, whichever comes first. | Sensor drift, though minimal, accumulates over time. Annual recalibration maintains traceability to reference standards. |
How should maintenance be performed after use?
| Interval | Task | Tools/Parts Needed | Estimated Time |
|---|---|---|---|
| After Every Use | Cap inlet/outlet ports; wipe exterior with dry cloth; charge battery if below 30% | Desiccant caps (included) | 5 min |
| Monthly | Inspect O-rings on quick-connect fittings; check rotameter for debris | Spare O-ring kit (P/N: OR-KIT-08) | 10 min |
| Quarterly | Run a zero-check using high-purity N₂ (<1 ppm H₂O, 99.999%); compare reading to gas certificate value | Calibration gas cylinder + regulator | 20 min |
| Annually | Full recalibration (5-point) at our factory or authorized service center; firmware update; sensor health diagnostics | Return shipping or on-site service | 1–3 business days |
| Every 3 Years (or as needed) | Sensor module replacement | Replacement sensor module (P/N: SM-AL2O3-V3) | 15 min (user-swappable) |
Why This Trace Moisture Analyzer Stands Out?
1. Titration method: Coulometric titration (coulometric analysis)
2. Display: 5-inch 800*480 capacitive touch screen
3. Electrolysis current control: 0~400mA automatic control
4. Measuring range: 3ug~100mg
5. Resolution: 0.1µg
6. Accuracy: (10µg~1000µg)±3µg; no more than 0.3% above 1000µg
7. Printer: micro thermal printer
8. Power supply voltage: 220×(1±10%)V
9. Power supply frequency: 50×(1±5%)Hz
10. Power: <40W
Ready to Partner With a Manufacturer You Can Trust?
Whether you're a regional distributor expanding your test & measurement portfolio, a national utility standardizing on a single moisture analysis platform, or an EPC contractor equipping multiple project sites-we are built to serve your scale.
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📦 Email：dylan@dualcanopy.com
Products Description
Q1: What's the lead time for orders?
A: Standard models ship in 3-7 days; customized units require 10–20 days.
Q2: Do you offer OEM/ODM services?
A: Yes, we can customize to your requirements, including OEM and ODM.
Q3: Can this analyzer measure moisture in transformer oil directly?
A: The analyzer measures moisture in gas phase. For transformer oil, we provide a headspace equilibrium adapter (included in the standard accessory kit) that extracts water vapor from the oil sample at controlled temperature.
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