... onMeasured Liquidwater, sea water, sewage, alcohol, various oils such as uniform, single, stable liquidDisplaybacklit LCD can display instantaneous flow, cumulative ... at the same timeSignal InputCan input two current signals(such as: temperature, pressure, liquid level, etc. signals) in order ... : Can output nearly 20 kinds of source signals (such as no signal, the reverse flow, etc.) Sound Alarm: ...