Machine Safety features

Question 1

Oxygen failure alarm

Answer 1

Has a distinct tone different from any other alarm.
Cant be disabled.
Cant be silenced.
Audible/Visual display.
Works irregardless of power.

Question 2

Anti-hypoxic devices

Answer 2

Chain link 25, pneumatic, paramagnetic. Nitrous oxide/oxygen mix no less than 25% oxygen delivered.

Question 3

Mechanical chain link

Answer 3

Oxygen and nitrous oxide linked by a chain to their control valves.
Nitrous cannot be turned on without turning oxygen on.

Question 4

Pnuematic

Answer 4

Pressure sensitive diaphragm that measures changing pressures in oxygen and nitrous oxide, and cuts off nitrous oxide if oxygen is too low.

Question 5

Paramagnetic analyser

Answer 5

Continuously measures oxygen concentrations.

Nitrous automatically switches off if oxygen falls below 25%.