PSA H2 generator is generally a PSA purification equipment to get pure H2 from the gas mixture with H2 as the main component.
High purity H2 Generation System
mainly comprises of Ammonia decomposition device for H2 generation.H2 pressurization system, PSA H2 Generator plus gas storage tanks....
Based on the requirement of gas production line, the
H2 source, takes liquid ammonia as the raw material, which decomposes into the
mixed gas of about 75% H2 and 25% N2 under the action of catalyst of Nickel.
This will greatly improve the reliability and randomness of the H2 system,
which make it convenient to maintain the system, to ensure the stable operation
of the main production line.
The advantage of PSA H2 Generator PSA Hydrogen Generator,Hydrogen Generator,Hydrogen Generation Plant Suzhou Xinrui Purification Equipment Co.,Ltd , https://www.gas-equipment.net
The probe is a crucial component in precision measuring instruments. As the sensor that provides geometric information about the workpiece being tested, its development directly influences the accuracy, performance, efficiency, and flexibility of the measuring system. Coordinate measuring machines (CMMs) are typical examples of such instruments. Throughout their history, CMMs have seen significant improvements only when the precision measuring head introduced new touch principles and higher measurement accuracy. This highlights the fact that precision probes are key factors limiting the accuracy and speed of these systems. The ability of modern measuring instruments to meet current demands depends heavily on continuous innovation in probe technology.
2 Evolution of Precision Probes
The history of precision probes dates back to the 1920s with the introduction of inductive micrometers. However, it was not until the late 1950s, with the emergence of three-axis CMMs, that the field saw rapid development. Today, precision probes are generally divided into contact and non-contact types. Contact probes include mechanical, trigger, and scanning probes, while non-contact probes mainly consist of laser and optical video probes.
Mechanical probes, also known as hard contact probes, were among the earliest used in precision gauges. They rely on direct contact between the probe and the workpiece for positioning and measurement, typically used in manual operations. While simple and easy to use, they lack high accuracy and are no longer widely used except in specific cases due to their limitations in modern CNC measuring systems.
Trigger probes are currently the most commonly used type in three-dimensional probing. Developed by Renishaw in 1972, they detect a signal when the probe touches the workpiece, capturing the coordinate value of the point of contact. These probes offer good accuracy, low cost, and ease of use but suffer from issues like anisotropy and pre-travel, which limit their overall precision. Scanning probes, also called quantized probes, offer better accuracy and can measure continuously as the probe moves along the surface. Their principle involves detecting displacement and converting it into precise coordinates, making them ideal for complex geometries. However, their complex design and high cost restrict their widespread use.
Whether contact or scanning, these probes face challenges in measuring small internal features or delicate materials. Non-contact probes, using optical methods, avoid these issues by eliminating physical contact. They do not apply force, reducing the risk of damage to soft or fragile surfaces. However, factors like surface reflectivity and environmental conditions can affect their accuracy, making them less precise than contact probes at present.
3 Status Quo of Various Precision Probes
3.1 Trigger Probes
Trigger probes detect contact through various mechanisms, such as mechanical switches, piezoelectric crystals, or strain gauges. Early models used spring-loaded mechanical systems, leading to inconsistencies in pre-travel and repeatability. Modern designs, like Renishaw’s TP200, use advanced strain gauge technology to reduce errors and improve accuracy. Some probes combine multiple triggering methods, such as piezoelectric and electromechanical, to enhance performance and adaptability. For example, the TP800 supports long measuring rods up to 350 mm and offers high precision in various modes.
3.2 Scanning Probes
Scanning probes differ from trigger probes by providing continuous displacement data during contact. They require frictionless, high-precision motion systems. Early models, like Zeiss's scanning probes, used leaf spring guides and inductive sensors. Later, Leitz’s TRAX system introduced dynamic detection, improving accuracy by aligning movement with the normal direction of the measured surface. Newer models, such as Mecartex’s three-degree-of-freedom probe, offer enhanced stability and ease of use. Renishaw’s Revo probe represents a major advancement, enabling ultra-fast five-axis scanning at speeds up to 500 mm/s with high precision.
3.3 Non-Contact Probes
Non-contact probes, such as laser and optical vision probes, are gaining popularity due to their non-invasive nature. They are ideal for measuring soft, delicate, or complex surfaces without causing damage. Laser probes, like NEXTEC’s WIZPROBE, offer high resolution and accuracy, while systems like Perceptron’s SCANWORKS provide 3D scanning capabilities. Despite their advantages, non-contact probes still face challenges in achieving the same level of precision as contact probes, though ongoing research aims to close this gap.
4 Development Trends of Precision Probes
In recent years, the trend in precision probes has been toward higher accuracy, smaller size, better interchangeability, more functions, and digital integration. Trigger probes remain popular due to their cost-effectiveness and reliability, while scanning probes continue to evolve with improved design and affordability. Non-contact probes are expected to play an increasingly important role, especially in applications requiring high-speed, non-destructive measurements. The future of precision probes lies in intelligent, digitized systems capable of real-time analysis and adaptive control.
â—†Easy installation
The equipment is of compact structure, wholly skid-mounted, low space requirement without the infrastructure investment and small investment.
â—†It is more economical than other ways of H2 supply.
Pressure Swing Adsorption technology is a kind of easy and simple way to supply H2. It takes the decomposed gas from ammonia or natural gas. The energy consumed is only the electricity consumption of the H2 compressor, which endows it with such advantage of low running cost, low energy consumption and high efficiency.
â—†Integrated design of mechatronics and instrumentation makes the automatic operation realized.
Imported PLC fully controls the full automatic operation. The flow rate, pressure and purity of H2 are adjustable and can be displayed continuously; alarm of pressure, flow rate and purity can be set and remote automatic control and testing or measuring can also be realized, therefore, the unmanned operation is truly realized.
â—†Peak/Fail Safety system
Alarming and automatic start-up function of Peak/Fail back-up system can be configured for the user to ensure the safe and reliable running of the system.
â—†The high purity of components and parts is the guaranty of the stable and reliable running.
The key parts such as pneumatic valves and solenoid valves are all imported from Germany or Japan with advanced configuration. They are operated reliably with fast switching, and long service life of millions. They are of low failure rate, easy maintenance and low maintenance cost.
â—†Oxygen content can be displayed continuously, and if it is beyond the limit, there will be automatic alarming.
On-line monitoring of H2 purity to ensure the stability of the H2 purity required.
â—†High quality molecular sieve
The high quality molecular sieve has large adsorption capacity, high compressive performance with long service life. The service life of normal operation is 8 to 10 years.
â—†Advanced filling technology of molecular ensures the working life of the equipment.
The Evolution and Development Trend of Precision Probe Technology
1 Introduction