▼ Core Requirements for Micro Pumps in Online Monitoring Equipment

In online monitoring systems across the power, chemical, and environmental protection industries, micro pumps perform critical functions such as sample delivery, circulation and return flow, and condensate removal. Taking the online hydrogen leakage monitoring of generator stator cooling water in power plants as an example, the system is required to operate continuously year-round, placing stringent demands on pump reliability, flow stability, noise control, and media compatibility. Traditional brushed-motor pumps have limited service life and require frequent maintenance under long-term continuous operation, making it difficult to meet the power industry’s equipment integration requirements of "low maintenance, high reliability."

The generator stator cooling water (stator water) system is a core element of thermal management for large generator sets. When leakage occurs in the stator cooling water circuit, hydrogen may enter the cooling water system, causing abnormal hydrogen content that threatens the safe operation of the unit. The stator water hydrogen detection system performs real-time sampling through dual channels (turbine end + exciter end) to continuously monitor dissolved hydrogen in the water samples.

In this system, JONSN micro pumps are mainly used for:

• Sample pressurization: Draw stator cooling water from the header and pressurize it into the constant-temperature, pressure-stabilized, and gas-liquid separation unit;

• Circulation/drainage: Stably return the tested water samples to the system or discharge them as required;

• Continuous operation: Ensure 24-hour uninterrupted water sample circulation through both the turbine-end and exciter-end channels.
  

▼ Role of JONSN Micro Pumps in the System

Based on the process flow of the stator water hydrogen detection system, JONSN micro pumps can be divided into two functional roles in the water sample circuit — "sample pressurization" and "circulation/drainage" — with typical parameters as follows:

▼ Core Advantages of JONSN Micro Pumps

JONSN micro pumps build technical competitiveness around four dimensions — "long service life, high stability, low interference, and strong compatibility" — with systematic optimization for the year-round continuous operation requirements of power online monitoring equipment, as reflected in the following five aspects:

▎Brushless motor with service life exceeding 10,000 hours. JONSN micro pumps are driven by brushless DC motors, with a core life rating of over 10,000 hours — several times the 2,000–5,000 hour life of traditional brushed-motor pumps. Online monitoring equipment in power plants typically runs continuously for no less than 8,760 hours per year, meaning brushed pumps may need to be replaced multiple times within a single overhaul cycle, while the brushless solution can cover at least one complete annual operating cycle, significantly reducing on-site replacement frequency and maintenance man-hours. This advantage is especially pronounced in areas that are inconvenient for inspection, such as power plant platform levels and electrical compartments.

▎Precise small-flow control for repeatable analytical data. The stator water hydrogen detection system has strict flow window requirements for water samples. JONSN micro pumps deliver stable output in the 200–400 ml/min range with minimal flow fluctuation and low pulsation, keeping the sample flow entering the gas-liquid separation unit and analyzer constant. Flow stability directly affects dissolved hydrogen stripping efficiency and detection signal consistency. JONSN’s precise small-flow control enables good repeatability and comparability of dual-channel (turbine end + exciter end) sampling data, avoiding misjudgment or missed alarms caused by flow drift.

▎Low-noise operation for in-cabinet integration. JONSN micro pumps operate with low vibration and low noise, making them suitable for integration inside standard online monitoring cabinets. Power plant platform levels and electrical compartments have on-site noise control requirements. Excessive pump noise not only affects the working environment of operation and maintenance personnel but may also interfere with electrical components and sensors deployed in the same cabinet. JONSN’s low-noise characteristics enable multiple pumps to coexist and run quietly within a compact cabinet, improving the overall on-site friendliness of the equipment.

▎Corrosion-resistant media compatibility for complex water sample conditions. The stator cooling water circuit may contain trace chemical additives such as corrosion inhibitors and pH regulators. Long-term contact places corrosion resistance requirements on the wetted-part materials of the pump. JONSN micro pumps use corrosion-resistant material solutions with good compatibility for water samples containing trace chemicals, and are less prone to seal failure or performance degradation from media corrosion during long-term continuous operation. This reduces the risk of leakage and downtime caused by material deterioration, and also allows the same pump model to adapt to a broader range of water quality online monitoring scenarios.

▎Proven track record of 24/7 continuous operation. JONSN micro pumps have completed long-term continuous operation validation in real projects at customers such as Ganwei Technology, providing reliability endorsement under actual working conditions. Compared with laboratory bench data, on-site track records better reflect the pump’s true performance under combined conditions such as temperature fluctuation, voltage disturbance, and water quality changes. This operational validation provides equipment manufacturers with traceable reliability evidence, forming a trust barrier that competitors find difficult to replicate in the short term.

▼ Real-World Application Case: JONSN-MRA in the Stator Water Hydrogen Detection System

The JONSN-MRA series micro pump is a brushless micro pump product designed for online monitoring equipment integration. In a power plant generator stator cooling water hydrogen leakage online monitoring project, the JONSN-MRA was deployed as a water sampling circulation pump in the dual-channel (turbine end + exciter end) detection circuit, handling the full-process delivery task of continuously drawing water samples from the stator water header, pressurizing them into the constant-temperature, pressure-stabilized, and gas-liquid separation unit, and returning the samples to the system via circulation after detection.

Key case information:

In this project, the JONSN-MRA’s brushless motor long-life characteristics enabled coverage of the annual continuous operating cycle, avoiding the downtime and maintenance costs caused by frequent brushed pump replacement. Its stable small-flow output ensured consistent water sample flow across both turbine-end and exciter-end channels, giving the two dissolved hydrogen detection data streams good repeatability and comparability. At the same time, its low-noise and corrosion-resistant characteristics enable the JONSN-MRA to operate stably over the long term in a compact cabinet, suiting the deployment environment of the power plant platform level. This case validates the reliability of the JONSN-MRA in critical power online monitoring circuits, providing a directly reusable model selection reference for similar water sampling and water circulation scenarios.

▼ Typical Extended Applications of JONSN Micro Pumps

Beyond stator water hydrogen detection, JONSN micro pumps also have broad adaptation potential in power and industrial online monitoring equipment:

Competition in online monitoring equipment is shifting from "function realization" to "long-term reliability." With core technical advantages including brushless motors, precise flow control, low noise, and corrosion resistance, JONSN micro pumps have been practically validated in key scenarios such as power plant stator cooling water hydrogen leakage online monitoring — the successful application of the JONSN-MRA in the dual-channel stator water hydrogen detection system being a typical example. For power online monitoring equipment manufacturers, choosing JONSN means injecting longer service life, lower maintenance costs, and higher on-site trust into the complete system.