... 3, Extremely low pressure loss 4, Easy installation Electronic flow switch (Thermal differential type)Principle Based on the principle of thermal ... . 7,Compact structure . 8, LED indicator display flow trend and switch state .Application Suitable for the gas and liquid measurement . Can ... oil),20…2000cm/s(air)Output: PNP, NPN, Relay , NO+NC (SPDT)Power supply :24V±20%DCSwitching Current : Max.400mA(PNP ...