We are the leading solution provider in China in the field of metering calibration. Since , TNMA has been developing and building test systems for measurement technology on gas meters, water meters and various flow meters. Our company has a group of technicians who are professionally engaged in the research of flow measurement technology. With decades of industry expertise and continuous investments in innovation, we have developed the industry&#;s most advanced and high end metering calibration equipment. Our engineers have long been committed to the field of flow measurement and control. With their unrelenting effort, we are able to offer our customers with highest level. Our products warmly welcomed by customers in the worldwide. With years of expertise and a passion for innovation, we are dedicated to transforming how you manage your utility meters.
If you want to learn more, please visit our website TNMA.
Water Meter Testing Equipment
Gas Meter Testing Equipment
Various Flow Meter Testing Equipment
Customization Options
Training and Support
Future-Ready Technology
We offering comprehensive calibration solutions for a diversity of clients in the Water Works and Gas Works Industry, both nationally and internationally such as:
Municipal water and gas companies.
State or Government owned Water and Gas Commissions.
Water Meter and Gas Meter Testing & Verification companies.
Private industries and companies in the Water Works or Gas Works business.
We also provide tailor-made solutions for clients on flow meter industry.
As experts in the field of metrology, we place a strong emphasis on both product research and development, as well as exceptional after-sales support. Our primary goal is to deliver products that meet the highest standards, reflecting our dedication to precision and quality. With a focus on innovation and customer satisfaction, we stand by our promise to offer top-notch products coupled with reliable after-sales assistance. For our R&D team, we have:
&#; One professor-level senior engineer and one senior engineer
&#; Over ten software engineers, hardware engineers, structural design engineers.
&#; Over twenty production and skilled assembly workers in the company.
&#; Besides, we have kept good relations of cooperation with the relevant research institutes, which ensure our company&#;s products and technology keep a leading position in this industry.
1. Venturi Sonic Nozzle
Our company independently designs and manufactures the Venturi sonic nozzle in accordance with the requirements of ISO- (E) "Measurement of gas flow using critical flow Venturi nozzles" and JJF- "Calibration Specification for Standard Devices of Gas Flow using Critical Flow Venturi Nozzle Method. "
The relative expanded uncertainty (Urel) of the nozzle discharge coefficient is 0. 2% (k=2), as stated in the calibration certificate issued by a metrological verification institution at the provincial level or higher.
Venturi sonic nozzle is characterized by simple structure, stable performance, high accuracy, easy maintenance, long verification circle( 5 years ), no moving Parts etc.
2. Dynamic Image Processor(apply to gas meter test bench)
High efficiency: Dynamic image processor not only recognize gas meter counter but also count number and count time automatically. Thus&#;it means shorten run empty time before test gas meter. Especially for Qmax and Qmin, which greatly enhance efficiency. If we compare with optoelectronic sampling, dynamic image processor can enhance 20%-40% efficiency.
Long distance test: dynamic image processor has high pixel, the distance between the camera and the gas meter being inspected can be extended to 7cm, making it convenient for the removal, installation, and wiring of IC card gas meter batteries.
Are you interested in learning more about Bell-Prover Gas Meter Test Bench? Contact us today to secure an expert consultation!
High collection rate: Dynamic image processor has above 99% success rate which collect gas meter signal. It overcomes manual adjustment, difficult to focusing, even collect signal unsteadily after adjustment
3. Dynamic image processor(apply to water meter test bench)
We usually use human eye recognition and infrared laser on the test bench to catch the information of the water meter, which has lot of shortcomings, thus we develop dynamic image processor to get the water meter information, With the following advantages that warmly welcome by our clients.
1. Efficient detection, 2. Verification function 3. Movement installation error correction function. 4. Meter Number Entry
As a professional manufacturer specializing in gas meters, water meters, and various flow measurement testing devices, and being a key player in the industry, our company has actively participated in the drafting of several national standards and regulations in the People's Republic of China.
We have contributed to the formulation of the "Calibration Device for Water Meters JJG-, " a national metrology calibration regulation.
The "Bell Prover Gas Flow Standard Device JB/T -, " a mechanical industry standard.
The "Calibration Specification for Positive Displacement Piston Flow Standard Device JJF-, " a national metrology technical specification.
Simultaneously, our company's dedication to research and development has gained remarkable achievements. Our "High-Precision Bell Prover Gas Flow Standard Device" was honored with the Zhejiang Province Science and Technology Award (Third Prize).
Furthermore, our "Piston-Type Gas Flow Calibrator Based on Zero-Balance Adjustment Principle" received the Zhejiang Province Quality Technology Supervision Technological Innovation Award (First Prize).
These accolades underscore our company's prowess in professional technical research and manufacturing capabilities.
We have a strong transportation advantage with easy access, being situated near Shanghai and Ningbo. We have &#;working area, our annual capacity up to sets. Over twenty production and skilled assembly workers in the company&#;which can ensure the timeliness deliveries.
At TNMA, we're not just a manufacturer &#; we're your collaborative partner in ensuring accurate and reliable meter measurements. As industry pioneers, we understand the critical importance of precise meter readings in managing resources efficiently and billing accurately. Reach out to us at export@hztnma. com and let's embark on a journey of innovation together.
Thermal conductivity is a critical performance indicator for Thermal Interface Materials (TIMs), which quantifies their ability to transfer heat. The TIM Tester (ASTM D) is a popular method used to measure the thermal impedance of TIMs and can be used to calculate an apparent thermal conductivity. However, relying solely on TIM Tester measurements may miss several specifics of the sample, leading to an inaccurate understanding of overall performance and increased risk of potential safety issues when applied to a thermal management system. Here are five added benefits for testing TIMs with the Modified Transient Plane Source (MTPS).
Most TIMs use nanoparticles to enhance their thermal conductivity. However, the filler distribution can substantially impact the performance of the TIM. For instance, particle settling can cause a higher thermal conductivity near the bottom of the sample and a lower one at the top. TIM Testers cannot detect side-to-side variations, providing instead an average thermal conductivity of the sample. Inaccurate data of this kind can lead to TIMs being applied to systems resulting in non-ideal performance and heightening potential for failure.
Anisotropic materials can improve heat dissipation in situations where directionality is important. TIM Testers cannot differentiate in-plane and through-plane of anisotropic materials. Unaccounted for this can have significant implications on material performance. Transient methods such as Transient Plane Source (TPS) or Modified Transient Plane Source (MTPS) have a long history of being applied for testing of anisotropic materials.
Measuring materials under representative conditions is essential for obtaining accurate thermal conductivity data, this is especially true for TIMs. The TIM Tester requires specific testing conditions as outlined in the ASTM standard which may not reflect the realistic application conditions of the TIM. This includes factors such as temperature and force applied during testing (sample compression). This can lead to inaccurate data and compromised product performance when applied to real world applications.
Precision and repeatability are crucial when measuring any property. However, ASTM D for TIM Testers does not specify a precision or bias statement, making it challenging to acquire reliable data especially for product certification or technical specifications. The standard states that the thermal conductivity values for the same material measured in different laboratories are expected to be within 18% of the mean value, which does not meet the criteria required for many advanced industry applications.
The TIM Tester, like all steady-state methods, requires the system temperature to reach steady-state equilibrium before valid data is obtained, which can take upwards of an hour or longer depending on the material. This seriously limits the rate of data generation that is possible and can bottleneck groups dealing with high-throughput requirements. Transient methods provide an accelerated approach with measurement and analysis possible in only a few minutes or even seconds depending on the method employed.
In conclusion, while TIM Testers are useful for measuring thermal impedance and can provide a calculated apparent thermal conductivity value, relying solely on them may lead to an incomplete understanding of material performance. Transient methods can provide not only a faster, but more well-defined and representative measurements of TIMs. This can greatly assist in understanding product performance when applied to real world situations.
This blog post is a part of our Thermal Interface Materials (TIMs) & Dielectrics application page.