Q	flow: g/s
T	temperature, °C
P	pressure, mbar
R	resistance, Ω
RT	response time, s
DPF	Diesel Particulate Filter
NEDC	New European Driving Cycle
LTC	Low-temperature Combustion
PN	Particle Number
PM	Particulate Matter mass
EGR	Exhaust Gas Recirculation
OBD	Onboard Diagnostics
IDEs	Interdigitated Electrodes
Subscripts
s	sensor
exh	exhaust