Confined Space Gas Testing using MSA Alt Air5x

OSHA dictates that the minimum "safe level" of oxygen in a confined space is 19.5%, while the maximum "safe level" of oxygen in a confined space is 23.5%.
How to conduct a Confined Space Gas Testing
Using MSA Alt-Air5x, Waterstop Sample Probe & 10 feet sampling hose.
(1ft = 1 second) * Sampling time depends on the length of the hose.
Three Levels in a Confined space:
1. Flammable gas (Methane - CH4)
2. Oxygen (O2) 19.5% - 23.5% & Carbon monoxide (CO)
3. Toxic Gas (Hydrogen Sulfide -H2S)

[@Idealcalibrations]

Hey Gerald, love the content, you're doing great work! Where are you out of? If there's a way to send you some calibration gas to sponsor some videos I'd love to do it. Keep it up!