31/01/2020 NOx gas is running low (600PSi)

06/02/2020 New Cylinder quote requested :

13/03/2020 109:30 Nitrogen Cylinder installed (Cylinder No 4494).

See Airmonitors Engineer report :

https://github.com/urbanobservatory/deployments/blob/master/Precision%20Station%20Reports/CRADLEWELL/MB13032020_Newcastle%20Uni_Cradlewell_Commissioning%20NO%20cyl.xls