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Nexisense Spinning Piston Pressure Gauge: High-Precision Pressure Reference and Verification Integrated Solution
The Nexisense spinning piston pressure gauge is specially designed for metrology institutions and industrial process control. It realizes constant-speed smooth rotation through a motor-driven piston system, completely eliminating speed fluctuations, vibration interference, and piston rod breakage risks caused by manual operation. This series of products integrates a high-precision process signal measurement module, supporting simultaneous acquisition of current, voltage, and switch signals of the instrument under test, meeting the one-stop verification needs of pressure sensors, pressure transmitters, and pressure switches. It has been widely used in national metrology institutes, power, petrochemical, and metallurgical enterprises’ pressure instrument traceability systems.
Core Technical Features
The motor-driven system ensures impact-free and noise-free piston rotation, combined with a low-center-of-gravity hanging basket design and an integrated anti-breakage protection patented structure, significantly improving weight loading stability and repeatability. The piston assembly adopts tungsten carbide material with long wear-resistant life; special weights use non-magnetic stainless steel for long-term rust prevention. The modular piston system supports quick disassembly, inspection, and maintenance. The host integrates a sewage discharge system and oil return filtration device to maintain the cleanliness of the working medium.
The large screen simultaneously displays parameters such as current (0-25mA), voltage (0-10V), switch quantity, displacement, time, and atmospheric pressure. The electrical measurement accuracy reaches 0.02%, and it provides DC24V±2% power supply output, which can directly power the instrument under test. Built-in high-precision pressure module (optional 0.05% or 0.02%) realizes intuitive synchronous reading of pressure-electrical signals. The working medium is a mixture of 25# transformer oil and kerosene (7:1) or diisooctyl sebacate, and the interface adopts M20×1.5 quick internal thread ×2, fully complying with JJG59-2022 “Verification Regulation for Liquid Piston Pressure Gauges”.
Typical Application Scenarios
Metrology Verification Institutions and Calibration Laboratories: As a pressure reference, used for periodic verification and calibration of instruments in the full range of 0.06-250 MPa. The electrical measurement module realizes synchronous comparison of pressure-current/voltage, significantly improving verification efficiency and data traceability.
Power and Metallurgical Industries: Deployed at high-reliability monitoring points such as boiler pressure and hydraulic systems to perform on-site comparison verification of pressure transmitters, ensuring key parameters meet metrology requirements.
Petrochemical Process Control: Used for regular on-site verification of pressure instruments, reducing process deviations caused by drift, and supporting batch instrument management and CNAS accreditation.
Typical project cases include the upgrade of the pressure laboratory of a national metrology institute, introducing multiple 0.01-grade and 0.005-grade models. After integrating the electrical measurement module, the verification time for a single instrument was shortened by approximately 40%, and automated weight loading reduced human error. In another large petrochemical enterprise instrument management project, this equipment was used as an on-site reference to perform periodic verification on more than 200 transmitters. The annual verification cycle fully complies with national metrology regulations, significantly reducing operation and maintenance costs.
Selection Guide
Selection focuses on measurement range and accuracy grade: For the low-pressure section (0.06-0.6 MPa), the DKH8006A model is recommended; for the high-pressure section (5-250 MPa), the DKH8250 is selected. Accuracy from 0.05 grade to 0.005 grade is optional. For 0.005 grade and 0.01 grade, it is recommended to combine with local gravity acceleration field measurement to ensure accurate weight force values.
When selecting the electrical measurement module, confirm the output type of the instrument under test (mA/V/switch). For batch projects, gravity correction coefficient tables, special weight quality certificates, and non-standard range extension services can be provided to ensure seamless matching with existing verification processes.
Integration Considerations
Before installation, confirm the chassis level and piston verticality. After weight loading, monitor the descent speed and duration. Electrical measurement integration uses shielded cables, and DC24V power supply should pay attention to load capacity. System docking can collect display data through the RS232 interface and supports integration with LIMS or metrology management systems. Regular maintenance focuses on checking piston descent rate, sealing, and weight quality changes. The piston effective area should be inspected annually. The operating environment should be controlled at 18-28°C to avoid the influence of temperature gradients on the effective area.
OEM Customization and Batch Supply Advantages
Nexisense supports OEM label production and can customize range combinations, electrical measurement display interfaces, weight material markings, and software communication protocols. Batch supply provides tiered pricing, special weight配套, on-site installation training, and verification cycle tracking services. The delivery package includes JJG59-2022 compliance statement, calibration certificate, and maintenance manual to help calibration institutions and industrial enterprises efficiently build metrology traceability systems.
FAQ
| Question | Answer |
|---|---|
| 1. What are the main technical advantages of the spinning motor drive compared to traditional manual rotation? | The motor achieves constant-speed smooth rotation, eliminating speed fluctuations and vibration interference, improving piston floating stability and measurement repeatability, while reducing the risk of piston rod breakage, meeting the operational requirements of JJG59-2022 for high-precision grades. |
| 2. How does the built-in electrical measurement module realize one-stop verification of pressure transmitters? | 0.02% accuracy collects 0-25mA/0-10V signals and provides DC24V power supply, supporting synchronous comparison of pressure-electrical signals and switch quantity detection of on/off status, meeting the requirements of automated verification regulations. |
| 3. What special requirements does 0.005 grade accuracy have for gravity acceleration? | Field g-value measurement and input of correction coefficients are required to ensure accurate special weight force values. The system automatically completes effective area correction, complying with the regulation’s uncertainty evaluation standards. |
| 4. What conveniences does the modular piston system provide in terms of inspection and maintenance? | It allows separate disassembly of the piston assembly for inspection without returning the whole machine to the factory; the tungsten carbide material and anti-breakage patent extend service life, and on-site replacement only takes a few minutes. |
| 5. What are the working medium selection and maintenance precautions for high-pressure models? | Diisooctyl sebacate is recommended, combined with oil return filtration and sewage discharge system to ensure cleanliness; under high pressure, regularly check sealing to avoid particle blockage affecting effective area stability. |
| 6. How to achieve seamless data integration with laboratory LIMS systems? | Output current/voltage/pressure synchronous data through the RS232 interface, support custom protocol development. For batch projects, SDK sample code can be provided to realize automatic upload and report generation. |
| 7. Does batch procurement support non-standard ranges and weight customization? | Yes. It supports customization of weight intervals, non-standard ranges, and gravity correction tables according to project needs, and provides complete uncertainty evaluation reports and CNAS accreditation support. |
| 8. How is technical support arranged during the warranty period and after expiration? | Free three guarantees for quality issues within the 18-month warranty period; after expiration, lifetime paid repair, free technical consultation and training are provided, with spare parts supply cycle controlled within 7 working days. |
Conclusion
The Nexisense spinning piston pressure gauge takes motor drive stability, high-precision electrical measurement integration, and modular maintenance as its core competitiveness. It has been verified for its reliable value in multiple metrology traceability and industrial verification projects. Integrators, calibration laboratories, and process control enterprises can contact us to obtain complete technical specification sheets, sample testing arrangements, and project cooperation solutions to jointly improve pressure metrology accuracy and management efficiency.
