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Engine Management

Sensor Types

TermDefinition
Potentiometer A 3-wire variable resistor that varies voltage to the computer based on position - DC Analog output
Switch A mechanical device with only ON and OFF conditions - DC Digital output
Rheostat A 2-wire variable resistor that varies current based on position - DC Analog output
Magnetic Pulse Uses a rotating component and a pickup coil to send a signal to the computer based on rotational speed or position - AC Analog output
Photoelectric Use an LED and optical device to monitor rotational speed or position - DC Digital output
Hall Effect Use a magnet and an integrated circuit (chip) to monitor rotational speed or position - DC Digital output
Thermistor A variable resistor that changes its resistance due to temperature changes - DC Analog Output
Piezoelectric A sensor that generates a voltage output based on pressure changes - AC Analog output
Piezoresistive A sensor that changes its resistance based on pressure changes - DC Analog or Digital output
Titanium O2S A semiconductor oxygen sensor whose resistance changes based on oxygen content - DC Analog output
Zirconium O2S An oxygen sensor that varies its output voltage using galvanic reactions based on oxygen content in the exhaust - DC Analog output
Piezocapacitive A sensor that changes its capacitance based on pressure changes - DC Analog or Digital output
Created by: jcoombes