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Maintenance-free room sensor AERASGARD® RCO2 – SD with active output, automatic calibration (fixed), in an elegant plastic housing with snap-on lid, for determining the CO2 content of the air (0…2000 ppm). The measuring transducer converts the measured values into a standard signal of 0 -10 V. Maintenance-free room sensor AERASGARD® RCO2 – W with active/switching output, automatic calibration (can be deactivated), in an elegant plastic housing with snap-on lid, optional with traffic light indicator (five coloured LEDs), 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 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 measurement is performed using an optical NDIR sensor (non-dispersive infra-red technology). The detection range is calibrated for standard applications such as monitoring residential rooms and conference rooms.
| 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 |
| Service life | > 60 months (under normal load conditions) depending on the type of loading and gas concentration |
| 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 | plastic, material ABS, colour pure white (similar to RAL 9010) |
| Dimensions | 98 x 98 x 33 mm (Baldur 2) |
| 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 (according to EN 60 529) |
| Standards | CE conformity, electromagnetic compatibility according to EN 61 326, EMC Directive 2014/ 30/ EU, Low Voltage Directive 2014/ 35/ EU |
| Display | with display for displaying the actual CO2 content in ppm |
