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1)Analog signal
2) Digital Signal- Discrete (ON/OFF)
There are mainly two types of signal
1) Analog (eg 4-20 MA)
2) Digital (eg 0-1 / 0 or 5 v)
Active signals(Measuring signal)
Passive signals(Sourcing signal)
Digital signals
Analog signals
There are two different types of sensor signals i.e Analog & digital. In analog pressure sensor, temparature sensor, sound sensor included. In digital Temparature sensor (DS 1620), Digitall accelerometers included.
electrical or optical signals
1- digital sensors (on\\off) like limitt switch
2- analog sensors (0 to 5 volt) like RTD
Digital sensors like switches always have discrete output ( high or low ).
While Analog sensors have different types of output signals (0-20 mA, 4-20 mA, 0-10 V, 0-5 V etc)
current signal
voltage signal
