The HZWS-Y Insulating Oil Micro-Water Tester employs the Karl Fischer Coulometric titration method — the most reliable technique for measuring trace amounts of water in various substances. Incorporating the latest automatic control circuits and a 32-bit embedded microprocessor as its core, along with a mini operating system, this tester delivers reliable operation and ease of use, with fast analysis speed, simple operation, high precision, and strong automation.
It is widely used across industries including petroleum, chemical, electric power, railway, pesticide, pharmaceutical, and environmental protection.


| Titration Method | Coulometric titration (Coulometric analysis) |
|---|---|
| Display | Color LCD touch screen |
| Electrolytic Current Control | 0~400mA automatic control |
| Measurement Range | 3μg~100mg |
| Resolution | 0.1μg |
| Accuracy | 10μg~1000μg: ±3μg; above 1000μg: not more than 0.3% |
| Printer | Miniature thermal printer |
| Power Voltage | 220V × (1±10%) |
| Power Frequency | 50Hz × (1±5%) |
| Power Consumption | <40W |
| Operating Temperature | 5~40ºC |
| Operating Humidity | ≤85% |
| Dimensions | 320 × 235 × 150 (mm) |
| Weight | 4.5KG |

We are an integrated trade and manufacturing company with our own factory.
Yes, we accept OEM/ODM/OBM and can customize the built-in software of the product according to the customer's special requirements.
In normal circumstances, products in stock can be received within 5 to 7 days via the fastest international express. Other situations may vary depending on the quantity of products ordered, whether there are special customization requirements, and the delivery time chosen.
We use professional internal and external packaging to ensure the safety and stability of the products during transportation. For fragile or other special parts, we include an extra set so the customer can use the product immediately upon receipt.
For quality issues not caused by human error, we provide a one-year warranty from the time the product is delivered, along with lifetime technical support. Other after-sales issues will be addressed by our professional technical staff within 24 hours. The product comes with a user manual and an operation video.