38
LIST OF UNITS
DESIGNATION MEANING
LEL Lower explosive limit
% Percent
ppm parts per million
ppb parts per billion
UEG Unter Explosion Grenze (= LEL in German)
LEL Limite inférieure d’explosivité (= LEL in
French)
bar unit of pressure
mb unit of pressure (millibar)
Rh relative humidity
m/s metres per second
mg unit of weight (milligram)
unit + flashing U free indication of unit