Gas meter

test installations

Here you will find recent gas meter test facility projects

Gas meter test installations
What is an gas meter test facility
For whom

There are companies and agencies all over the world that have to deal with gas meters in one way or another. You can think of energy suppliers or companies that produce and repair gas meters. But also national institutions that monitor the SI units. They may be offered gas meters from other companies for calibration. It is important for these companies and organizations that they can demonstrate the quality of their gas meters. To make this possible, they need a gas meter test system.


The principle of a gas meter test installation is that a gas meter to be investigated is compared with one or more reference meters. The meter to be examined and the reference meters are connected to each other by means of pipes and valves. The installation often has a fan and a control valve with which a certain flow can be set. The whole is constructed in such a way that the same amount of air passes through the meter to be examined as well as the reference meters.

When preparing a test, the operator will, among other things, set a flow rate with a specific test time. The meters emit a number of pulses during the test. The number of pulses per unit of time is a measure of the amount of air that passes through it. However, this amount is not only dependent on the number of pulses per unit of time. In determining, the influence of temperature and pressure is also taken into account. In addition, a correction is also made to the deviation of the reference meters at the set flow rate. Ultimately, the amount of air through the meter to be examined is compared with that of the reference meters. A percentage deviation follows from this. Doing this for multiple flow rates, spread between the maximum and minimum capacity creates an error curve.

This error curve says something about the quality of the meter to be examined.


RonTronx has entered into a partnership with PGM for the development of gas meter test installations. PGM developed the mechanical construction and the reference gas meters. And RonTronx the software and hardware controls with associated calibration software. RonTronx has more then 15 years of experience in the field of gas meter calibration systems.


PGM has even more years of experience and they developed a special pulsation-free gas meter. These meters are extremely suitable to be used as reference meters in test installations. Because this type of meter does not influence the meter under test due to posible pulsations. 

In the past RonTronx has built different types of gas meter test installations. In particular low pressure installations, but also a high pressure and a sonic nozzle test installation. By combining the experience and knowledge of both our companies, we are able to build test installations that meet all our customers' wishes for the best price.

Our test installations are particularly suitable for testing rotor, turbine and ultrasonic gas meters under atmospheric conditions. Atmospheric conditions means that we use normal ambient air as a test medium.

Hardware functionality

All components that we use are freely available on the market. This is important for the maintainability and service life of the installation. This also applies especially to the control cabinet. The heart of the installation is a Beckhoff PLC with its input and output cards. A real-time program runs in the PLC that takes care of pulse-time measurement. By means of the in- and output cards we are able to control the installation and accurately measure the pressure and temperature.

  • Compact design.

  • All components free available on the market.

  • Start, stop, reset and emergency stop. 

  • Meter under test pulse amplifying

  • Complete with electrical drawings. 

De schakelkast bestuurt de installatie en voert de benodigde metingen uit.

Software functionality

In addition to the PLC program, we have also developed special LTF software that can be installed on almost any Windows machine. With this LTF software, the operator can prepare a test plan, setting different flows with a specific test time. The test plan is executed fully automatically after starting. During the tests, the relevant temperatures, pressures, counted pulses and the elapsed time are measured. At each test point the passed volume is calculated for both the meter to be investigated and the reference meters used.Comparing these volumes gives a certain deviation. The percentage of this deviation is called the 'Error' of the meter under investigation. This error is determined for all flows in the test plan and presented in a graph. All data is stored for possible analysis at a later date. The test report can be printed with your own company logo. The language of the HMI can be changed literally in any language. The software can present the results in different units (metric or imperial). Multiple user levels can be set for operators. The sensors used can be calibrated using the program. Any software updates are automatically downloaded and installed if required.For more information about prizes or a demo you can contact PGM or RonTronx.

  • Automatically testing of gas meters.

  • User defined test reports.

  • Storage of each meter under test.

  • Machine learning flow control.

  • Artificial intelligence controlled HMI language

  • Calibration of internal used temperature sensors, barometer, dp-transmitter  and pulstime measurement.

  • Machine operating hours and load balancing of standaard meters.

  • Remote notification and control on Android smartphone.

  • Metric and imperial unit support.

  • Automatic software updates. 

  • To make some space for more text


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