omni directional cell phone booster.What are the superior performance of commonly used flow meters

　　The commonly used gas flow meter is a volumetric flow meter with average measurement accuracy and small initial flow rate, which can achieve IC card prepayment function. Another advantage is that the price is moderate, making it the primary choice for residential and small commercial users. The shortcomings are that the membrane type gas skin film is prone to aging, and after aging, the measurement value will produce negative deviation, resulting in a shorter service life; When the flow rate is greater than 25m3/h, this type of gas meter has a large basic error and cannot achieve metering. Moreover, gas meters with a flow rate greater than 25m3/h have a larger volume, so they are generally not used for large commercial users. For gas operating enterprises that are in the stage of developing user markets and need to expand their business scope, according to the economic capacity of users, membrane gas meters should be selected for small commercial users with gas usage pressure below 3000Pa and gas consumption less than 25Nm3/h. This gas meter generally does not consider a temperature and pressure compensation device. Although this type of gas meter does not have a temperature, pressure, and volume correction function and has some metering loss, it is commonly used in places with lower pressure, and this metering loss is generally acceptable to both the supply and demand sides. For gas companies, the positive and negative deviations generated by this instrument can basically maintain a balance between profit and loss.

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