Brochure

7
Lufft OPUS20 TCO
Temperature, Rel. Humidity, CO
2
The amount of carbon dioxide had been
virtually constant at 280 ppm
(parts per million) – i.e 280 gas
molecules per million air molecules
– the last ten thousand years. However
in recent years, this measured value has
been increasing rapidly at approx.
2 % per year.
A high level of CO
2
in the air within a
room causes headaches, tiredness and
lack of concentration. The regulation on
CO
2
concentration was established in
order to evaluate IAQ (Indoor Air
Quality). Normal atmospheric air in
so-called ‘clean air areas’ has a level of
360 ppm and approx. 500 ppm in urban
areas. The limit of 1,000 ppm
(“Pettenkofer Figure”) is still seen as
being adequate indoor-air quality, which
is especially important when regarding all
meetings and conference rooms, as well
as schools and open-plan of ces.
As a guideline for school rooms in the
USA the limit of 1,000 ppm applies; for
workplaces the occupational exposure
limit is 5,000 ppm.
Lufft OPUS20 TCO / Temperature / Relative Humidity / CO
2
Order-No.
Lufft OPUS20 TCO / Temperature / Rel. Humidity / CO
2
(neutral without Lufft-Logo 8120.20N) 8120.20
Lufft OPUS20 TCO / Temperature / Rel. Humidity / CO
2
POE
(neutral without Lufft-Logo 8120.21N)
8120.21
Technical data Dimensions length 166 mm, width 78 mm, depth 32mm
Measurement rate 10/30s, 1/10/12/15/30min, 1/3/6/12/24h
Storage rate 1/10/30min, 1/3/6/12/24h
Construction plastic housing
Operation life (battery) > 4 month
Data storage 16 MB, 3,200,000 measured values
LC-Display size 90x64 mm
Weight approx. 250g
Included in delivery PC-Windows Software SmartGraph 3
for graphical and numerical representation
of measured values / instruction manual/
data cable / battery
Interface USB, LAN
Power supply 4 x LR6 AA Mignon, USB, (POE opt.)
Max. operation
temperature
-20...50°C
Max. rel. humidity 0...95%r.F.<20g/m
3
(non condensing)
Max. altitude 10,000 m above sea level
Temperature Principle NTC
Measurement range –20 … 50 ° C
Accuracy ±0.3°C (0...40°C), otherwise 0.5°C
Resolution 0.1°C
Rel. Humidity Principle capacitive
Measurement range 10...95%r.h.
Accuracy ±2%r.h.,
Resolution 0.5%r.h.,
CO
2
Principle NDIR
Measurement range 0 … 5,000 ppm
Accuracy ± 50 ppm +3% of measured value
(at 20 ° C and 1,013 mbar)
Resolution 1 ppm
Long-term stability 20 ppm/a
Accessories 4 x LR6 AA Mignon 8120.SV1
Power supply adapter 8120.NT
Measure-
ment
For high-precision
CO
2
measurements