Room CO2 sensor and measuring transducer AERASGARD® RCO2-W VA

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

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)

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

Sensor

Optical NDIR sensor (non-dispersive infra-red technology),

with manual calibration (via zero button),

with automatic calibration (can be deactivated via DIP switches)

Measuring range

0...2000 ppm or 0...5000 ppm (selectable via DIP switches)

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

Long-term stability

< 2 % in 15 years

Protection class

III (according to EN 60 730)

Protection type

IP 30