Liquid Nitrogen poses a particularly high risk because any spill with evaporate very quickly expanding 740 times and rapidly displacing Oxygen.

# O2 concentration 23% to 19% is normal atmospheric concentration so is SAFE
# At O2 concentration 18% YOU SHOULD EVACUATE THE AREA
# At O2 concentration 16% there will be impaired Co-ordination, Fast Breathing, Fast Heartbeat, Drowsy, Nausea, Reduced Work-Rate
# At O2 concentration 14% to 10% There will be respiratory problems and Unconsciousness will ensue
# At O2 concentration 8% or less there will be DEATHS – Typically after only 5 minutes exposure

Oxygen Depletion Monitors are thus essential safety equipment to protect personnel working near liquid nitrogen storage vessels, dewars and freezers.

These monitors continuously protect personnel by warning of decreasing oxygen levels. They can be linked to Audio, visual and/or remote alarms.

ALPinE offers a free site survey to provide workplace risk assessment together with clear recommendations for location of system components. Following this ALPinE can also provide complete installation by qualified engineers.

Calibration:
Please note that Oxygen Depletion Monitors require recalibration every 6 months. ALPinE offers a routine calibration service as well as advising Health, Safety, Environment and Quality personnel on the correct procedures. All instruments used by ALPinE for calibration purposes have documentation to confirm their accuracy, traceable to manufacturers’ standards and, where applicable, NAMAS.

Life of Oxygen Detector:
The Oxygen Detector has an estimated life of 2 years. Therefore, ALPinE advise replacement every 18 months.

http://www.amlab.co.uk/