O2 for U

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How to Read Your Oxygen & Nitrous Gauges

O2 FOR U • GAUGE READING GUIDE

KNOW WHEN TO REFILL.

Select a cylinder level and watch how oxygen and nitrous gauges respond.

SELECT CYLINDER LEVEL
O2

OXYGEN

Compressed gas

GAUGE READING 2,000 PSI

Example: full cylinder

REFILL REMINDER Call by 500 PSI
N2O

NITROUS

Liquid + vapor

LOW NITROUS PRESSURE See what a low reading looks like.
GAUGE READING ~750 PSI

May remain steady as gas is used

LOW-PRESSURE REMINDER Call near 400 PSI
i

Oxygen pressure decreases as gas is used. Nitrous pressure may remain nearly constant while liquid remains.

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Educational examples only. Oxygen readings assume a 2,000 PSI full cylinder at approximately constant temperature. Nitrous pressure is temperature-dependent and cannot reliably indicate cylinder contents while liquid remains. Reorder according to your facility's inventory, delivery schedule, and backup supply procedures. These example pressures do not establish remaining safe treatment time.