a) on the load carrier at two diagonally opposite corners and in the approximate geometric centre;
b) on items in the load with at least one on an item at each level in the load carrier (up to a maximum of
three if the load carrier accommodates load items on more than one level);
c) one on an item in the region known to be slowest to attain the disinfection temperature;
d) one on an item in the region known to be fastest to attain the disinfection temperature;
e) one adjacent to the automatic control temperature sensor;
f) one adjacent to the process recorder or indicator sensor (if fitted) in each chamber or compartment.