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Second-Class Standard Platinum Resistance Thermometer WZPB-2 (Zinc Point Quartz Tube) | High-Precision Temperature Metrology Standard Device
Nexisense Second-Class Standard Platinum Resistance Thermometer WZPB-2 (Zinc Point Quartz Tube Type)
Nexisense second-class standard platinum resistance thermometer WZPB-2 (zinc point quartz tube type) is a precision standard device specially developed for temperature metrology traceability. This product adopts high-purity platinum wire winding and is protected by a quartz sleeve. It is strictly designed in accordance with the requirements of the International Temperature Scale (ITS-90). The nominal resistance value at the water triple point is 25Ω, with a sensitivity of 0.1Ω/℃, and the resistance ratio W(Hg) ≤ 0.844235. It is used as a standard when verifying various standard mercury thermometers, industrial platinum resistance thermometers, copper thermal resistance thermometers, and precision thermometers. It can also be directly used in temperature measurement scenarios with high accuracy requirements.
The product temperature range covers 0~419.527℃ (medium temperature), and the quartz sleeve has an outer diameter of Φ7mm and a length of 520mm, featuring good thermal stability and chemical inertness. Nexisense is oriented toward engineering solutions. Through strict manufacturing processes and stability control, it ensures that this standard platinum resistance thermometer maintains excellent repeatability and low drift characteristics during long-term use, providing reliable temperature reference standards for metrology laboratories and industrial sites. This product helps users build an accurate temperature measurement and calibration system, meeting the requirements of national metrology regulations for second-class standard devices. It is widely used in temperature metrology, process control, and scientific research fields.
Product Highlights
Solving Pain Points in Precision Temperature Metrology Traceability
In the field of temperature metrology, common pain points include insufficient stability of standard devices, poor repeatability, large environmental interference, and difficulty in guaranteeing calibration accuracy. These issues directly affect the traceability and system reliability of measurement results. The Nexisense second-class standard platinum resistance thermometer WZPB-2 (zinc point quartz tube type) adopts a high-purity platinum wire and quartz protection sleeve design, effectively addressing the above challenges and providing a high-precision and highly stable temperature standard reference.
Three Core Selling Points
Excellent Stability: The quartz sleeve material has a low thermal expansion coefficient. Combined with a precision winding process, it ensures stable resistance values and excellent repeatability during long-term use.
High-Precision Measurement Capability: The nominal resistance at the water triple point is 25Ω, with a sensitivity of 0.1Ω/℃. The resistance ratio is strictly controlled to meet the precision requirements of second-class standard devices.
Reliable Anti-Interference Performance: The quartz sleeve provides good insulation and chemical stability, effectively resisting environmental temperature fluctuations and medium interference. It is suitable for use in laboratories and on-site applications.
Product Overview
Nexisense second-class standard platinum resistance thermometer WZPB-2 (zinc point quartz tube type) is an important metrology standard device for transferring the International Temperature Scale. Its core value lies in serving as a reliable link in the temperature metrology traceability chain: it plays a standard role in verifying standard mercury thermometers, industrial platinum resistance and copper thermal resistance thermometers, and various precision thermometers. At the same time, it can be directly applied to high-accuracy temperature measurement tasks.
The product adopts a medium-temperature zone design defined by the zinc point, with a temperature range of 0~419.527℃. The quartz sleeve ensures fast thermal response and stable physical and chemical properties. Nexisense focuses on engineering practicality. Through rigorous material selection and manufacturing processes, it reduces self-heating effects and thermoelectric potential influences, helping metrology institutions and industrial users achieve accuracy and consistency in temperature measurement. This standard device provides a solid foundation for establishing a complete temperature calibration system, assisting in process control optimization and product quality improvement.
Core Advantages
Hardware Material and Structural Advantages
The platinum resistance element is precisely wound with high-purity platinum wire. The protection sleeve is made of quartz material, with an outer diameter of Φ7mm and a length of 520mm. The quartz sleeve has an extremely low thermal expansion coefficient, excellent insulation performance, and resistance to chemical corrosion. It can effectively protect the internal platinum wire from mechanical damage and medium contamination. The sleeve type is quartz, ensuring structural stability and signal purity within the temperature range of 0~419.527℃.
Precision and Stability Optimization
The nominal resistance value at the water triple point is 25Ω, the sensitivity reaches 0.1Ω/℃, and the resistance ratio W(Hg) ≤ 0.844235. These parameters strictly comply with the technical requirements for second-class standard platinum resistance thermometers. The product meets the relevant indicators for working standards, first-class standards, and second-class standards in terms of thermometer stability during initial verification and use. The self-heating effect and thermoelectric potential are controlled within the specified ranges, ensuring repeatability and long-term stability.
Anti-Interference Capability and Measurement Reliability
The quartz sleeve provides good electrical insulation and thermal isolation performance, effectively reducing the impact of external electromagnetic interference, mechanical vibration, and medium corrosion on measurement. Natural thermal effects and thermoelectric potential indicators are strictly controlled. It is suitable for use in laboratory or industrial environments. Although it is mainly used as a standard device with high-precision resistance output, its stable resistance-temperature characteristics make it easy to pair with high-precision resistance measuring instruments or temperature secondary instruments to achieve reliable data acquisition.
Through the above advantages, Nexisense WZPB-2 provides a highly reliable standard reference for temperature metrology engineering projects, helping users improve the accuracy and traceability capabilities of their measurement systems.
Technical Parameters
The following are the main technical parameters of the Nexisense second-class standard platinum resistance thermometer WZPB-2 (zinc point quartz tube type):
| Parameter | Specification Description |
|---|---|
| Temperature Range | 0~419.527℃ (medium temperature) |
| Nominal Resistance Value at Water Triple Point (Ω) | 25 |
| Sensitivity Ω/℃ | 0.1 |
| Resistance Ratio | W(Hg) ≤ 0.844235 |
| Sleeve Type | Quartz |
| Sleeve Outer Diameter | Φ7mm |
| Sleeve Length | 520mm |
Stability Requirements Reference (Partial Indicators)
First verification thermometer stability requirements: Rtp, WAL, WAn and other parameters meet the specified values for working standards, first-class standards, and second-class standards.
The differences in multiple divisions at each fixed point and the differences between two adjacent periodic verification results are controlled within the allowable ranges for the corresponding grades.
Natural thermal effect and thermoelectric potential: self-heating effect/mK and thermoelectric potential μV comply with the requirements for working standards, first-class standards, and second-class standards.
The product is produced strictly in accordance with the International Temperature Scale (ITS-90) and relevant metrology regulations. It is suitable for use as a standard to verify various thermometers or for direct high-precision temperature measurement.
Application Scenarios
Nexisense second-class standard platinum resistance thermometer WZPB-2, with its high precision and stability, is suitable for the following typical scenarios:
Metrology Institutions and Laboratory Traceability: As a standard device to verify standard mercury thermometers, precision thermometers, and various industrial temperature instruments, establishing a temperature metrology standard chain.
Industrial Process Temperature Calibration: Verifying industrial platinum resistance and copper thermal resistance thermometers, supporting periodic verification and maintenance of temperature instruments in chemical, pharmaceutical, power, and other industries.
Scientific Research and Precision Measurement: Directly used for temperature experiments with high accuracy requirements, material thermal property research, and environmental simulation tests.
Temperature Instrument Production and Quality Control: Used as a reference standard in temperature sensor manufacturing enterprises for factory inspection, type evaluation, and consistency verification.
In addition, it can be extended to fields such as aerospace, food processing, and medical equipment temperature verification, providing consistent high-precision standard support for various temperature-related measurements.
Installation and Operation Guide
The Nexisense second-class standard platinum resistance thermometer WZPB-2 is an insertion-type standard device with a simple structure. It mainly performs measurement through resistance output and does not require complex power supply or communication wiring.
Operation Steps Prompt:
Insert the thermometer protection sleeve into the measured medium or verification bath, ensuring appropriate immersion depth (usually the working length is fully immersed).
Use a high-precision resistance measuring instrument (such as a bridge or digital multimeter) to connect the platinum resistance leads and measure the resistance value.
Convert to the corresponding temperature value according to the resistance-temperature relationship (refer to the ITS-90 temperature scale formula or the verification certificate).
When used as a standard, place it in the same temperature field with the thermometer under test for comparison and calibration.
After operation, slowly remove the thermometer to avoid thermal shock, clean the sleeve surface, and store it properly in a dedicated protection box.
The quartz sleeve has a relatively fast thermal response, but during operation, avoid violent impact or bending. It is recommended to perform high-precision measurements in a constant temperature environment and send it for periodic verification regularly to confirm performance. For complete usage methods, resistance-temperature conversion tables, and precautions, please refer to the verification certificate and instruction manual attached to the product. It is recommended that operations be performed by professional personnel with metrology operation experience.
Precautions for Use:
Avoid colliding the sleeve with hard objects to protect the quartz material.
Ensure reliable lead connections during measurement to reduce the influence of contact resistance.
Store long-term in a dry, normal temperature environment, avoiding high temperature or humidity.
Perform periodic verification regularly to maintain the traceability validity of the standard device.
Frequently Asked Questions
Q1. What temperature range is the Nexisense WZPB-2 second-class standard platinum resistance thermometer suitable for?
It is mainly suitable for the 0~419.527℃ medium temperature zone (defined by the zinc point) and can also be extended to a wider range to meet the needs of precision temperature metrology in the medium temperature zone.
Q2. How is the accuracy and stability of this thermometer guaranteed?
The resistance at the water triple point is 25Ω, the sensitivity is 0.1Ω/℃, and the resistance ratio is strictly controlled. The stability indicators meet the requirements of second-class standards. The quartz sleeve further improves long-term repeatability.
Q3. What are the advantages of a quartz sleeve compared to a metal sleeve?
The quartz sleeve has a low thermal expansion coefficient, excellent insulation performance, and strong corrosion resistance. It can effectively reduce self-heating effects and external interference, providing a purer temperature signal.
Q4. How to convert the resistance value to a temperature value?
Read the resistance value through a supporting high-precision resistance measuring instrument, and convert it using the ITS-90 temperature scale formula or the division table provided in the product verification certificate.
Q5. What instruments is this standard device mainly used to verify?
It can be used as a standard to verify standard mercury thermometers, industrial platinum resistance thermometers, copper thermal resistance thermometers, and various precision thermometers. It also supports direct high-precision temperature measurement.
Q6. What should be noted in operation and maintenance?
Avoid mechanical damage to the quartz sleeve, ensure sufficient immersion depth during use, and regularly send it to a metrology institution for verification to maintain traceability validity. Operations are recommended to be completed by professional personnel.
Summary and Next Steps
Nexisense second-class standard platinum resistance thermometer WZPB-2 (zinc point quartz tube type) provides a stable, high-precision, and reliable standard solution for temperature metrology with high-purity platinum wire, quartz protection sleeve, and rigorous performance indicators. Its performance in stability, anti-interference capability, and measurement accuracy helps metrology institutions and industrial users effectively improve temperature traceability levels and process control quality.
If your project involves temperature instrument verification, precision temperature measurement, or the establishment of metrology standards, please feel free to contact the Nexisense technical support team. We will provide professional selection guidance, verification service support, or prototype evaluation to jointly build a temperature metrology system that meets actual needs. Take action now to obtain detailed technical information or schedule a technical exchange, making every temperature measurement a reliable metrology cornerstone.
