High-precision Trace Dissolved Oxygen Monitoring Solution

I. Solution Background

In the power, semiconductor, pharmaceutical, and fine chemical industries, dissolved oxygen (DO) in water is a core indicator for measuring water purity, controlling equipment corrosion, and ensuring product yield. Especially in scenarios such as supercritical unit feedwater, semiconductor ultrapure water, and water for injection, precise capture of ppb-level oxygen content fluctuations is required. Traditional offline laboratory testing is time-consuming, prone to contamination, and suffers from data lag; online equipment, on the other hand, is fixed in deployment, costly, and complex to maintain, making it difficult to meet the needs of multi-point mobile sampling and emergency testing.

This solution introduces the Zhongke Tk PC-301TD portable dissolved oxygen meter, constructing a system of "rapid on-site detection + intelligent data management + end-to-end quality control," adaptable to accurate monitoring of low-oxygen water quality in multiple industries, and contributing to the safe and compliant operation of equipment.

II. Core Product: Zhongke Tk PC-301TD Trace Dissolved Oxygen Analyzer

As a domestic benchmark for ppb-level detection, the PC-301TD is independently developed by Zhongke Tk (a national high-tech enterprise, CE certified) and specifically designed for low-oxygen water quality. Its core advantages are as follows:

Ultra-precise measurement, ppb-level detection limit: Detection limit as low as 0.01μg/L, zero-value error ≤±0.3μg/L, resolution 0.01μg/L, conforming to GB/T 12145-2016, meeting the stringent requirements of supercritical/ultra-supercritical units and semiconductor ultrapure water.

Immediate measurement upon startup, no polarization required: Electrode polarization-free, 15-second rapid response, no preheating wait; intelligent anti-interference algorithm, resistant to sulfide and heavy metal interference, automatic temperature compensation, stable and reliable data.

Portable and rugged, suitable for multiple scenarios: The main unit is IP67 waterproof and dustproof, and the electrodes are IP68 waterproof and dustproof. The entire unit is lightweight and comes with a high-strength protective case; AC/DC dual power supply ensures long battery life, making it suitable for mobile testing in confined spaces, at high altitudes, and in the field.

Intelligent interconnection and data traceability: Bluetooth connection to a dedicated APP enables real-time curves, one-click calibration, and storage of 100,000 data entries; it automatically generates compliance reports, supports export and audit trails, and meets GLP and industry compliance requirements.

III. Solution Design

(I) Adaptable Scenarios

Covering four core scenarios, accurately matching the needs of low-oxygen water quality monitoring:

* Power: Trace oxygen detection in condensate, feedwater, saturated/superheated steam, and boiler water to prevent corrosion and scaling.

* Semiconductor: ppb-level oxygen monitoring in ultrapure water and process water to ensure chip yield.

* Pharmaceutical: Dissolved oxygen detection in water for injection and purified water, meeting GMP standards.

* Special Inspection/Chemical: Sampling inspection of boiler and pressure vessel water quality, and quality control of industrial circulating water and high-purity water.

(II) Implementation Process

1. Deployment and Training: Plan mobile testing sites and routes; complete personnel training within 1 day, covering the entire process of calibration, sampling, testing, and data export.

2. Rapid On-Site Testing: Portable equipment is readily available at the testing site; connect to sampling pipelines; power on and start testing immediately, providing real-time readings and curves; instant alerts for abnormal data, allowing for rapid on-site handling.

3. Intelligent Data Management: Data is synchronized to the APP via Bluetooth, automatically storing and labeling information; one-click report generation, supporting export and cloud backup, full traceability, meeting compliance audit requirements.

4. Operation and Maintenance: Regular electrode calibration and maintenance; manufacturer provides a 1-year warranty and lifetime technical support; localized service with rapid response ensures stable equipment operation.

(III) Solution Value

Improved Efficiency: Replaces offline testing, providing results in 3-5 minutes on-site, increasing efficiency by 80%+ and avoiding delay risks.

Cost Reduction and Efficiency Improvement: No complex installation required, saving on online equipment procurement and maintenance costs; reduces manual sampling and testing, lowering labor costs.

Ensuring Safety: Accurately monitors trace oxygen levels, provides timely warnings of anomalies, prevents equipment corrosion and scaling, extends equipment lifespan, and reduces losses from unplanned downtime.

Compliance Management: Automatic data storage and traceability ensure compliant reporting, meeting the requirements of industries such as power, environmental protection, and pharmaceuticals.

IV. Solution Summary

This solution, centered on the Zhongke Tk PC-301TD trace dissolved oxygen meter, addresses the pain points of low-oxygen water quality monitoring by providing a high-precision, portable, and intelligent integrated solution. The product's performance rivals international brands, combining accuracy, flexibility, and cost-effectiveness. It has been implemented in over 100 power plants, special equipment testing institutes, semiconductor and pharmaceutical companies in China, with a repurchase rate exceeding 78%.

This solution effectively improves water quality monitoring efficiency and management, ensures safe and stable equipment operation, and helps enterprises reduce costs, increase efficiency, and achieve compliant development. It is an ideal choice for trace dissolved oxygen monitoring in industries such as power, semiconductors, and pharmaceuticals.