①被測流體成分②最大流量、最小流量③最高工作壓力④最高溫度、最低溫度被測流體必須具備一定的導(dǎo)電性，導(dǎo)電率＞5 s/cm。最大流量和最小流量必須符合下表中的數(shù)。內(nèi)徑（mm）1015202532405065Qmin(m3/h)0.08480.19080.33910.52990.86811.35652.11953.5820Qmin(m3/h)3.397.6313.5621.2034.7354.2684.78143.28內(nèi)徑（mm）80100125150200250300350Qmin(m3/h)5.42598.47813.246919.075533.91252.987576.302103.8555Qmin(m3/h)217.04339.12529.88763.021356.482119.53052.084154.22內(nèi)徑（mm）400450500550600700800900Qmin(m3/h)135.648171.6795211.95256.46305.208415.422542.592686.718Qmin(m3/h)5425.966867.18847810258.3812208.2216616.8821703.6827468.82內(nèi)徑（mm）10001100120014001600180020002200Qmin(m3/h)847.801025.8381220.8321660.6882170.3682746.8723991.204103.352Qmin(m3/h)3391241033.5248833.286647.5286814.72109874.88135648164134.08