An Introduction to the ZX-PRH Demulsibility Characteristics Tester

The ZX-PRH Demulsibility Characteristics Tester is a specialized laboratory instrument designed to evaluate the water separation properties of oils. This critical parameter, known as demulsibility, indicates an oil's ability to separate from water under controlled conditions, which is vital for assessing the performance and longevity of lubricants, industrial oils, and hydraulic fluids in applications where water contamination is a concern.

Instrument Overview and Principle

The apparatus consists of two primary units: a precision thermostatic bath and a dedicated control box. The test method guided by this instrument typically involves heating oil samples mixed with a specific quantity of water or emulsion to a standardized temperature. The mixture is then subjected to intense, standardized agitation. Following this agitation, the sample is allowed to settle under controlled temperature conditions. The volume of water separated over a defined period, or the clarity of the separated layers, is measured to determine the demulsibility characteristics.

Key Operational Features

1.Automated Stirring Mechanism: Integrated with an electric motor, the tester ensures consistent and reproducible agitation at a preset speed. This automation eliminates manual variability, a key factor in obtaining reliable and comparable results.

2.Uniform Temperature Control: The bath is engineered to maintain exceptional temperature uniformity (±0.5°C) across all samples. Precise thermal control is essential, as separation kinetics are highly temperature-dependent, making this feature crucial for test accuracy.

3.Programmable Timer with Alert: A built-in timer, automatically set for a standard 5-minute agitation cycle, includes an auto-alarm function. This ensures strict adherence to the test procedure, allowing technicians to focus on other tasks during the agitation phase.

4.Multi-Sample Capacity: With a capability to hold three measuring cylinders simultaneously, the instrument allows for batch testing of multiple samples or running replicates, thereby enhancing laboratory throughput and efficiency.

Detailed Technical Specifications

1.Bath Temperature Range: Adjustable from ambient (room temperature) up to 100°C, covering the standard test temperatures required for most oil specifications.

2.Temperature Control Accuracy: ±0.5°C, ensuring tight thermal management for precise condition simulation.

3.Sample Stirring Speed: 1500 ± 15 revolutions per minute (rpm). This high-speed agitation is critical for forming a consistent initial emulsion before the separation phase.

4.Sample Capacity: Accommodates 3 standard measuring cylinders for parallel testing.

5.Timer Setting: Fixed at 5 minutes for the agitation stage, with an automatic audible/visual alarm upon completion.

6.Power Requirements: AC 220V, 50Hz.

Conclusion

For technical personnel in research, development, and quality control laboratories, the ZX-PRH Demulsibility Characteristics Tester provides a reliable, user-friendly, and standardized platform for a fundamental oil analysis test. Its automated stirring, precise temperature regulation, and batch-processing capability make it an efficient tool for ensuring that oils meet required performance specifications related to water contamination resistance. Understanding its features and technical parameters allows for proper operation and maintenance, leading to accurate and consistent assessment of an oil's demulsibility—a key factor in predicting its performance in real-world, water-prone operating environments.

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