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- Accessory
Description
Room CO2 sensor and measuring transducer
AERASGARD® RCO2-W VA
Maintenance-free AERASGARD® RCO2 - W VA room climate transmitter with active/switching output, automatic calibration (can be deactivated), in an vandal-proof stainless steel housing, for determining the CO2 content of the air (0...2000 ppm/0...5000 ppm). The measuring transducer converts the measured values into a standard signal of 0-10 V or 4...20 mA (switchable).
The sensor device is used in offices, hotels, convention centres, apartments, shops, etc. for the purpose of evaluating the indoor climate. This enables energy-saving room ventilation on an as-needed basis, thereby reducing operating costs and improving well-being.
The sensor device is used in offices, hotels, convention centres, apartments, shops, etc. for the purpose of evaluating the indoor climate. This enables energy-saving room ventilation on an as-needed basis, thereby reducing operating costs and improving well-being.
The CO2 content is measured using an optical NDIR sensor (non-dispersive infra-red technology). The detection range is calibrated for standard applications such as the monitoring of residential and conference rooms.
Technical details
Voltage supply
24 V AC/ DC (± 10 %)
Power consumption
< 1.5 W/ 24 V DC typical;
< 2.9 VA/ 24 V AC typical;
peak current 200 mA
< 2.9 VA/ 24 V AC typical;
peak current 200 mA
Data points
Carbon dioxide (CO2)
Measuring range, CO2
0...2000 ppm or 0...5000 ppm (selectable via DIP switches)
Output, CO2
0 -10 V or 4...20 mA (selectable via DIP switches)
Measuring accuracy
typically ± 30 ppm ± 3 % of measured value
Temperature dependence, CO2
± 5 ppm/ °C or ± 0.5 % of measured value/ °C
(whichever is higher)
(whichever is higher)
Pressure dependence
± 0,13 %/ mm Hg
Gas exchange
by diffusion
Relay output
with potential-free changeover contact 24 V (assignment selectable via DIP switches)
Warm up time
approx. 1 hour
Response time
< 2 minutes
Output
0 -10 V or 4...20 mA, working resistance < 800 Ω
(selectable via DIP switches)
with offset potentiometer (± 10 % of the measuring range
(selectable via DIP switches)
with offset potentiometer (± 10 % of the measuring range
Sensor
Optical NDIR sensor (non-dispersive infra-red technology),
with manual calibration (via zero button),
with automatic calibration (can be deactivated via DIP switches)
with manual calibration (via zero button),
with automatic calibration (can be deactivated via DIP switches)
Measuring range
0...2000 ppm / 0...5000 ppm
Ambient temperature
0...+50 °C
Electrical connection
0.14 - 1.5 mm² via terminal screws
Housing
stainless steel V2A (1.4301)
Dimensions
100 x 100 x 25 mm (stainless steel housing)
Installation
wall mounting or on in-wall flush box, Ø 55 mm,
base with 4 holes, for attachment to vertically or
horizontally installed in-wall flush boxes for rear cable entry,
with predetermined breaking point for cable entry
from top/ bottom in case of plain on-wall installation
base with 4 holes, for attachment to vertically or
horizontally installed in-wall flush boxes for rear cable entry,
with predetermined breaking point for cable entry
from top/ bottom in case of plain on-wall installation
Long-term stability
< 2 % in 15 years
Protection class
III (according to EN 60 730)
Protection type
IP 30 (according to EN 60 529)
Protection type housing
IP 30
Standards
CE conformity, electromagnetic compatibility
according to EN 61 326, EMC Directive 2014/ 30/ EU,
Low Voltage Directive 2014/ 35/ EU
according to EN 61 326, EMC Directive 2014/ 30/ EU,
Low Voltage Directive 2014/ 35/ EU