37
LEL
Combustible gases
NH3
NH
3
(Ammonia)
NO2
NO
2
(Nitrogen Dioxide)
O2
O
2
(Oxygen)
SO2
SO
2
(Sulfur dioxide)
Units of measure
ppm
Parts per million.
mg/m
3
Milligrams per cubic meter.
% LEL
The lower explosive limit (LEL) is the minimum concentration of a gas, which, if given an ignition
source, is capable of producing a flash of fire.
% vol
Percent by volume refers to a defined amount of the gas in 100 parts of air. For example, normal air
contains 21% vol oxygen, or 21 parts oxygen in every 100 parts of air.
Other symbols
Yes.
No.
Maintenance due (calibration shown).
The down arrow indicates the number of
days since
the maintenance procedure was last completed.
The up arrow indicates the number of
days until
the maintenance procedure is next due.
or
Peak readings.
Used with peer messages to indicate the peer instrument is a Radius BZ1.
Used to identify an instrument's assigned (or available) user name. Also used with peer messages to
indicate the peer instrument is a Ventis Pro Series instrument.
Used to identify an instrument's assigned site name.
Return the instrument to Industrial Scientific.
Security code is required.
Data exchange or synchronization may be in progress.
Indicates that the sensor is operating on DualSense technology.
A sensor that was operating on DualSense has failed.
A sensor operating on DualSense is due for maintenance (sensor 1 shown here).