Item No. 1501-3140-7321-200
EAN 4 251325 613031

Patented quality product (patent no. DE 10 2014 010 719.1)

Maintenance-free duct sensor AERASGARD® KCO2-SD with active output, automatic calibration (fixed), in a compact plastic housing with snap-on lid, 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.

Maintenance-free duct sensor AERASGARD® KCO2-W with active/switching output, automatic calibration (can be deactivated), in a compact plastic housing with quick-locking screws, optionally with/without display, 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.

For more information, see the start of the chapter.

304,76 € net
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
Measuring range, CO2 multi-range switching (selectable via DIP switches)
0...2000 ppm; 0...5000 ppm
Output, CO2 0 - 10 V / 4...20 mA
Measuring accuracy, CO2 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 / 1 A),
switchpoint adjustable
Warm up time approx. 1 hour
Response time approx. 1 minute,
minimum flow rate 0.3 m / s (air)
Output 0 -10 V  or  4...20 mA,  working resistance  < 800  Ω
(selectable via DIP switches) 
with offset potentiometer (± 10 % of the measuring range
VOC sensor (metal oxide) (VOC = volatile organic compounds),
with manual calibration (via zero button),
with automatic calibration (can be deactivated via DIP switches)
Ambient temperature –10...+60 °C
Process connection by mounting flange, plastic
(included in the scope of delivery)
Protective tube PLEUROFORMTM, material polyamide (PA6), with torsion protection,
Ø 20 mm, NL = 202.5 mm, vmax = 30 m/s (air)
Electrical connection 0.14 - 1.5 mm² via terminal screws
Cable connection cable gland, plastic (M 16 x 1.5; with strain relief, exchangeable, max. inner diameter 10.4 mm) or
M12 connector according to DIN EN 61076-2-101 (optional on request)
Housing plastic, UV-stabilised,
material polyamide, 30 % glass-globe reinforced,
with quick-locking screws
(slotted/ Phillips head - combination),
colour traffic white (similar to RAL 9016),
housing cover for display is transparent !
Housing dimensions 72 x 64 x 43.3 mm (Tyr 1 with Display)
Cable gland M 16 x 1.5, including strain relief, exchangeable,
max. inner diameter 10.4 mm
Long-term stability < 2 % in 15 years
Protection class III (according to EN 60 730)
Protection type IP 65 (according to EN 60 529)* Housing tested,
TÜV SÜD, Report No. 713139052 (Tyr 1)
Housing in the built-in state
(permeable PLEUROFORM: IP 30)
Standards CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU
Display Display with illumination, two line,
cutout approx. 36 x15 mm (W x H),
for displaying the Actual CO2 content and
for setting the switchpoint