Duct air quality (VOC) and CO2 sensor AERASGARD® KLQ-CO2-W

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Product group: WG02

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

Maintenance-free AERASGARD® KLQ-SD duct air quality transmitter with active output, automatic calibration (fixed), in a compact plastic housing with snap-on cover, for determining theVOC content in three sensitivity levels (low/medium/high). The measuring transducer converts the measured values into a standard signal of 0-10 V.

Maintenance-free AERASGARD® KLQ-W duct air quality transmitter with active/switching output, automatic calibration (can be deactivated), in a compact plastic housing with quick-locking screws, for determining theVOC content in three sensitivity levels (low/medium/high). 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 assessing the indoor climate. This enables energy-saving room ventilation on an as-needed basis, thereby reducing operating costs and improving well-being.

The air quality is detected by a VOC sensor (mixed gas sensor for volatile organic substances). This sensor determines the load of contaminated gases in the room air, such as from cigarette smoke, body perspiration, exhaled breathing air, solvent vapours, emissions from building components, etc. Low, medium or high VOC sensitivity can be selected depending on the expected air contamination.

Available configurations

Artikelnummer	Bezeichung
1501-8111-7301-500	AERASGARD® KLQ-CO2-W
1501-8111-7371-500	AERASGARD® KLQ-CO2-W LCD

Voltage supply

24 V AC/ DC (± 10 %)

Power consumption

< 4.8 W/ 24 V DC typical; < 6.8 VA/ 24 V AC typical; peak current 200 mA

Data points

Air quality (VOC), carbon dioxide (CO2)

Sensor, VOC

VOC sensor (metal oxide) with automatic calibration
(VOC = volatile organic compounds)

Measuring range, VOC

0...100 % air quality; referred to calibrating gas;
multi-range switching (selectable via DIP switches)
VOC sensitivity low, medium, high

Output, VOC

0 -10 V (0 V = clean air, 10 V = polluted air) or 4...20 mA (selectable via DIP switches,
switchpoint can be adjusted from 0...100 % of the output signal)

Measuring accuracy, VOC

± 20 % of final value (referred to calibrating gas)

Service life

> 60 months (under normal load conditions)
depending on the type of loading and gas concentration

Measuring range, CO2

multi-range switching (selectable via DIP switches)
0...2000 ppm; 0...5000 ppm

Sensor, CO2

optical NDIR sensor (non-dispersive infra-red technology)
including atmospheric pressure compensation (up to 1100 mbar)
with automatic and manual calibration

Output, CO2

0 -10 V or 4...20 mA (selectable via DIP switches)

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 (assignment selectable via DIP switches)

Response time

< 2 minutes

Output

0 -10 V or 4...20 mA, working resistance < 800 Ω
(selectable via DIP switches, selected variant applies for all outputs),
with offset potentiometer (± 10 % of the measuring range)

Measuring range

0...2000 ppm / 0...5000 ppm

Ambient temperature

–10...+60 °C

Process connection

by mounting flange, plastic
(included in the scope of delivery)

Protective tube

PLEUROFORM, material polyamide (PA6), with torsion protection, Ø 20 mm, vmax = 30 m/s (air)
without filter: NL = 202.5 mm / with plastic filter: NL = 235 mm (optional with metal filter: NL = 227 mm)

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 dimensions

126 x 90 x 50 mm (Tyr 2)

Cable gland

M 16 x 1.5; including strain relief,
exchangeable

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 only! (PLEUROFORM IP 30)

Protection type housing

IP 65