... pressure loss 4, Easy installation Electronic flow switch (Thermal differential type)Principle Based on the ... structure . 8, LED indicator display flow trend and switch state .Application Suitable for the gas and liquid ... oil),20…2000cm/s(air)Output: PNP, NPN, Relay , NO+NC (SPDT)Power supply :24V±20% ... Max.400mA(PNP or NPN type ), Max.4A( Relay type )Unload current: Max.80mAFlow indicator : LED ...