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24
IE-LGR-Uxxxx-16
U4440
Compact thermometer -
hygrometer -
pressure gauge -
CO
2
concentration meter
This model is designed to measure temperature, relative
humidity, dew-point temperature, barometric pressure
and
the concentration of CO
2
in the air by internal
sensors. Barometric pressure can be measured as
absolute or recalculated to sea level. No
additional
probes or sensors can be connected. It is characterized
by a simple and compact design and a relatively long
response in the measured quantities, compared to
model with external probes. The sensors are located
under the grid on the front and side of the unit. The
device is suitable for measuring in places where there is
no rapid change in temperature or relative humidity, and
there is no condensation of water vapours. The device
is placed directly in the measured area. Accupack in the
device can be charged. As the internal battery creates
a parasitic
heat during the charging period,
the measurement accuracy may be affected by up to 1
ºC.
In battery mode, this model has significantly shorter
battery life than models without CO
2
concentration
measurement. For this reason, the measurement of CO
2
concentration does not occur as often as
the measurement of other variables. By default, this is
2 minutes with the option of extending up to 10 minutes
(option available in the COMET Vision software).
We recommend calibrating the relative humidity
and temperature of this device in the laboratory with
a sufficient air flow (at least 1 m / s), the reading can be
performed only after thorough settling, which can take up
to 4 hours.
The device has not a protection against the ingress of
water or dust. Do not use device at places where such
conditions can be expected.