Benchtop Oil Particle Counter

The MOEORW-WEC09 Mineral Oil Particle Counter adopts the light obscuration (shadowing) detection principle to quantify the size and quantity of insoluble solid particles suspended in liquid media. It delivers automated full-process particle contamination testing for various mineral oils and organic polymer solutions, supporting 13 mainstream international and industrial contamination grading standards. Equipped with integrated pressure control modules, high-precision injection sampling hardware, touchscreen operation, local printing and multi-channel data export functions, the instrument realizes full closed-loop workflow including sample pretreatment, automatic testing, data storage, calibration and equipment self-maintenance. It meets laboratory and on-site continuous monitoring requirements for fluid cleanliness control across multiple industrial sectors.

Hardware & Structural Design
1.Integrated positive/negative pressure dual regulation cabin with independent pressure gauges and adjustment valves, supporting automatic pressure-assisted sampling for high-viscosity oil samples; emergency pressure relief button for safe pressure chamber operation.
2.High-precision motor-driven high-pressure injection pump as the core sampling unit, detachable structure for regular solvent cleaning to guarantee volumetric sampling accuracy.
3.11-inch touch control panel with full graphical menu; physical shortcut keys for rapid switching between testing, calibration, maintenance and data modules.
4.Complete fluid pipeline layout including sampling needle, testing platform, waste liquid discharge port and sewage outlet; matched air filter assembly with drain and replaceable filter components.
5.Multi-port rear panel layout: USB storage, serial communication, power interfaces for host and air pump, reset switch, observation window for air filtration unit.

Performance Capabilities
1.Light obscuration laser sensor with photodiode signal acquisition, converting particle occlusion area into linear pulse signals for accurate particle size grading and counting.
2.Three independent calibration curves (ACFTD, ISOMTD, custom curve) supporting noise test, particle size calibration and volumetric calibration to eliminate systematic testing deviation.
3.Built-in 13 international and industrial contamination grading standards, plus user-defined channel configuration with up to 50 self-set particle size detection channels.
4.Dual testing modes (automatic / manual): automatic mode executes pre-set flushing, vacuum degassing, pressure holding and sampling sequences; manual mode allows real-time pressure control, stop and exhaust operations during testing.
5.Multi-dimensional data management: local internal storage + U disk export + PC serial data upload; supports time-period data query, group data deletion, batch printing and test parameter record review.

Practical Application Value
1.Multi-level user authority management (administrator + operator): account creation, password modification and permission assignment, with a maximum of 5 registered users to standardize laboratory operation management.
2.Independent maintenance module with automatic reverse flushing and pipeline cleaning functions; configurable cleaning volume and flow rate, with optional particle concentration detection to judge cleaning completion.
3.Customizable output templates: editable sample name, batch number, inspector information; selectable print contents including particle count, average value and contamination grade.
4.System parameter adjustable: Chinese/English bilingual switching, system time calibration, stirring speed adjustment with 12 gear options for uniform particle dispersion before testing.

The instrument is applicable for solid particle contamination inspection of hydraulic fluids, lubricants, transformer insulating oil, turbine oil, gear oil, engine oil, aviation kerosene and water-based hydraulic media, as well as insoluble particle testing of organic liquid and polymer solutions. Target industries cover:
1.Aerospace & Aviation
2.Power Generation & Electric Utilities
3.Petroleum & Chemical Processing
4.Port & Transportation Equipment Manufacturing
5.Metallurgy & Heavy Machinery
Automobile Production & Component Testing

Laser Sensor Detection Principle
The liquid sample enters the glass flow cell via negative pressure siphon. Laser beams collimated by optical lenses vertically penetrate the flow cell and reach the photodiode detector. Without particles, the detector outputs a stable maximum photocurrent. When solid particles pass through the laser path, light shielding reduces incident optical power, generating negative pulse current signals. The pulse amplitude is proportional to the particle's projected cross-sectional area, enabling the system to calculate particle dimension and perform counting based on signal magnitude.
 

Complete Instrument Operation Logic
1.Sampling Stage: The three-way valve switches to sampling state, the high-pressure injection pump extracts oil samples through the sampling needle into the laser flow cell; particle shading signals are amplified and collected by the circuit, then transmitted to the single-chip microcomputer for particle size classification and statistical counting.
2.Discharge Stage: The three-way valve shifts to liquid drainage position, the injection pump pushes residual sample into the waste liquid container.
3.Reverse Flushing Stage: The valve remains at drainage mode, the pump draws cleaning solvent from the waste cup to backwash the flow cell, removing residual particle contaminants and preventing pipeline blockage.