... and reverse polarity protection, high reliability and interference capabilityMultiple output optional, optional relay output for alarm or controlField jumpers selection air velocity range ... time10sOutput4~20mA,0~10VDC,RS485/ModbusGeneral Relay output1×SPDT,1A/30VDC,0.5A/125VACAnalog output load≤600Ω(4~20mA),≥2KΩ(0~10VDC ...