True regarding anaesthesia apparatus –
Oxygen failure safety device operates to detect oxygen supply pressure (not N2O pressure). So, if O2 supply pressure is low it operates to interrupt the flow of N2O.
Rotameter reading may not get affected by dirt inside the tube
Rotameter reading may not get affected by static electricity
The Boyle machine is an intermittent flow device
An oxygen failure safety device operate even in the absences of nitrous oxide