We are the leading solution provider in China in the field of metering calibration. Since 2001, 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.

What We Offer:

Water Meter Testing Equipment

Gas Meter Testing Equipment

Various Flow Meter Testing Equipment

Customization Options

Training and Support

Future-Ready Technology

Who Do We Serve

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.

Our Innovation

1. Venturi Sonic Nozzle

Our company independently designs and manufactures the Venturi sonic nozzle in accordance with the requirements of ISO9300-2005 (E) "Measurement of gas flow using critical flow Venturi nozzles" and JJF1240-2010 "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.