At present, CNG fuel dispenser is refined oil circulation trade settlement is one of the most important measuring instruments, their level of accuracy as high as 0.3.In order to ensure the accurate measurement of oil, cng pump of verification work is particularly important.At present, the cng dispenser domestic measurement technology organizations adopt static verification of fuel tankers error value for volume method, which uses cng dispenser the standard metal gauge standard device verification fuel tankers. Standard metal volume measurement standard gauge standard device for the primitive method, high accuracy degree, maximum allowable error is better than 0.05%.Standard metal volume capacity value calculation mainly depends on measuring the cng fuel dispenser neck level and standard metal temperature gauge, cng fuel dispenser the measuring liquid level height and temperature measurement using artificial reading neck measurement neck gauge and thermometer.And artificial reading way for human reading Angle and resolution etc. There are a lot of uncertainty, cause the liquid level height value and temperature value read inaccurate and unreliable.
In recent 5 years, cng pump many researchers think of sensor technology to implement the standard metal volume measurement of liquid level height and neck temperature automatic acquisition work.But in terms of level measurement, the length of the measuring sensor for measuring performance problem such as resolution, stability has been short of actual use requirement, therefore it has not been able to perfect the implementation of the automatic data collection work.In recent two years, as the sensor technology to further improve, level measurement
The success of the new type of magnetostrictive cng fuel dispenser liquid level sensor was made solved this problem, and cng pump its measuring range linear good, resolution of 0.01% FS, high precision, good stability, cng dispenser make the function of high precision level automatic data collection were applied in the standard metal gauge measuring liquid level height measurement.