The measurement error curve is controllable and meets the requirements of the 1.5-level meter stipulated by the EU Instrument Directive MID.

   The measurement error curve is stable and meets the requirements of wide range. The range of the high zone is widened. The range of the high zone (boundary flow reaches to upper flow rate) reaches 24, and the range ratio is increased from 150 to 375.

    Obtained the EU EN1359-2017 standard certification.

    Using resistance welding technology to innovate the meter’s joint. According to the metal material, thickness, contact area and other factors, the current size, welding wire position, welding time, etc. are controlled during welding, which Overcome the technical difficulty of thin-wall welding that is easy to perforate. Integrating the meter shell and the meter joint to avoid the risk of leakage of the gas meter caused by improper installation or accidental force, and to ensure the sealing of the gas meter.

    The torsion at the welding point reaches ≥250N·m, which is better than the requirements of the national standard (80N·m) and the European standard (110N·m), and avoids the loosening of the joint during the installation process. The joint is integrated with the shell, and the risk of leakage caused by the aging of the riveting process seal ring is eliminated.

    Through the study of the characteristics of heat-sensitive materials, utilizes its characteristics of the expansion and contraction, and designs a temperature conversion device, which automatically adjusts the parameters of the rigid connecting rod system to Convert the gas volume at different temperatures to the volume at standard temperature for measurement, so that the measurement is not affected by the ambient temperature, which ensures the accuracy of gas meter measurement and the fairness of billing.

  The "smart gas meter control software" developed by our company constitutes an smart control system for the gas meter with control chips, hardware circuits, electromechanical valves, etc., to realize smart control and management of gas consumption. In abnormal conditions such as overcurrent, overtime, high voltage, low voltage, magnetic interference, etc., the gas meter can automatically shut off the valve or close the valve remotely. With safety shut-off functions such as abnormally large flow, small flow, gas leakage, etc., it effectively prevents the dangerous accidents such as fires and explosions, improves the management of safe gas use.

The mechanical metering unit and the electronic metering unit are designed synchronously to match the parameters of the mechanical and electronic metering units, and double reed switch design is adopted to ensure the accuracy of electronic metering through a variety of high technologies.

 The error of electronic counting and mechanical counting is controlled within 1/1000000, which is better than the electromechanical conversion error requirement in European technical report CEN/TR16061:2010 "Smart Gas Meter" (2/10000), and the European standard EN16314:2013 "Gas Meter Additional Device"(5/10000).

Qinchuan has developed the “two-way non-blocking gear drive electromechanical valve special for gas meters”, which has realized the stability and reliability of the on-off valve.

On-off valve current＜40mA, on-off valve time＜2.8s (1 cycle), valve opening time＜0.8s, valve closing time＜0.1s, valve closing leakage＜10ml/h, valve opening and closing times can reach 30,000 times.

    The quiescent current of the IC card smart gas meter is less than 30μA, the battery life is more than 1 year; The quiescent current of the IoT smart gas meter is less than 20μA, which guarantees that the 8.5Ah lithium battery can services for more than 10 years.

   Qinchuan’s self-developed “smart gas meter integrated management system”, which can support the access management and business data management from a variety of IoT terminals (gas meters, water meters, etc.). This platform adopts technologies such as data caching, database read-write separation, data warehouse and big data to improves business processing capabilities, making the system easy to maintain, expandable, and safe.

    Qinchuan’s smart gas meters use information verification technology, intrusion detection technology, and history tracing to improve the information security. IoT smart gas meter has a built-in information security module, which is responsible for communication management to ensure the safety of gas meter communication and the legality of business.