FläktGroup DC_9806GB 20180525_R0 We reserve the right to make changes without prior notice
CO2 SENSOR
STBZ-50, STAZ-50, STCZ-82
DATASHEET
FEATURES
• 3 sensors in one enclosure
• Infrared CO
2
measuring technology (NDIR)
• Internally separated measuring chamber for humidity and
temperature
• 5 year warranty
• Normally maintenance-free
• Reduces energy costs for demand-driven ventilation
FUNCTION
The sensor is an advanced and versatile 3-in-1 controller and
measures the CO
2
concentration, temperature and relative
humidity in the ambient atmosphere. It has a change-over
relay output and three separate 0-10V outputs, of which one is
pre-programmed as a combined output for CO
2
, temperature and
relative humidity.
This combined 0-10V output has three separate P bands for CO
2
(600-900 ppm), temp-erature (22-23 °C) and relative humidity
(75-85% RH). Configurations and preferences are set using a PC.
OPERATION
The sensor combines all the data necessary to effectively
regulate the indoor environment in buildings such as offices,
hotels and schools. The use of CO
2
measurement for demand-
driven ventilation results in a healthy, comfortable and cost
effective environment in the building.
INSTALLATION
The sensor is installed in a normal indoor environment on a
wall where it is not exposed to direct sunlight or draughts.
When installing the unit over a mounting box or conduit these
must be sealed so as to prevent draughts that could affect the
performance and accuracy of the unit.
Fig. 1 Terminal block for connection
NC Relay
COM Relay
NO Relay
OUT(3)
OUT(2)
OUT(1)
Max
24V AC/DC
+_ 20 %
2
Datasheet
FläktGroup DC_9806GB 20180525_R0 We reserve the right to make changes without prior notice
TECHNICAL DATA
Supply voltage: 12V DC, 24V AC/DC ± 20 %, (50-60Hz)
Power consumption Average:
Max./peak:
Output signal/P band:
Relay output:
< 0.35W
< 2W
Rout <100, Load: >5 k
Activated > 1000 ppm CO2
Deactivated > 900 ppm CO2
OUT1 Combined output:
CO2:
Temperature:
Relative humidity:
0-10V DC
600-900 ppm
22-23°C
75-85% RH
OUT2 CO2: 0-10V DC, 0-2000 ppm
OUT3 Temperature: 0-10V DC, 0-50 °C
CO2Accuracy:
Measuring method:
Measuring interval:
± 3 % of the measured value
NDIR
15 s
Temperature sensor Accuracy:
Measuring interval:
0,3 °C *2
15 s
Relative humidity: Accuracy*:
Measuring interval:
5 % RH (@ 20-80 % RH)
15 s
Relay Change-over potential-free: 1A, 50V AC/24V DC
Storage temperature:
Operating temperature:
Operating humidity:
Dimensions (HxWxD):
Enclosure class:
-30 to +70 °C
0 to +50 °C
0-95 % RH
125x85x22 mm
IP20
* Measurement accuracy depends on the installation of the product. See the heading INSTALLATION.
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