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Elegant appearance, touch-operated interface, large display, and Modbus-compatible

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Good room climate is measurable!

Active and Modbus capable room sensors for temperature, humidity and CO2 now also for in-wall installation!

AERASGARD® FSCO2

All quite relative

Pressure measuring transducer for gaseous and liquid media in cost-efficient Standard version for 0 to 16 bar

PREMASGARD® SHD-SD

VOC in focus

Room and duct sensors for detection of mixed gases in cost-efficient Standard versions

AERASGARD® RLQ-SD

Für jede Anwendung die richtige Lösung [Translate]

ALQ-CO2 MODBUS

AERASGARD® ALQ-CO2 MODBUS

Item No. 1501-7111-6001-200
EAN 4 251325 613475

The maintenance-free, microprocessor-controlled AERASGARD® AFTM - LQ - CO2 - Modbus and ACO2 - Modbus ⁄ ALQ - CO2 - Modbus with Modbus connection, with ⁄ without optional display, is designed for on-wall installation and is used to monitor all measurands of relevance to the climate inside a room. These are the measurands air humidity, temperature, CO2 concentration as well as air quality (VOC). By using a single device to monitor all four measurands, it is possible to effectively monitor and regulate the entire room climate. It measures CO2 in the range of 0...5000 ppm, VOC at one of three selectable sensitivity levels LOW / MEDIUM / HIGH, temperatures in the range of –35...+80 °C, as well as relative air humidity from 0...100 % r.H.

The relative humidity (% r.H.) quotient of water vapour partial pressure divided by the saturation vapour pressure at the respective gas temperature. A digital, long-term stable sensor used as measuring element for relative air humidity and temperature guarantees exact measurement results.

The CO2 content of the air is measured using an optical NDIR sensor (non-dispersive infra-red technology). The detection range of the sensors is calibrated for standard applications such as monitoring residential rooms and conference rooms. Room ventilation on an as-needed basis, improved well-being and customer benefit, increased comfort as well as reduced operating costs through energy conservation are just some of the benefits of employing the AERASGARD® CO2 sensor.

The explanations above demonstrate that there are applications for CO2 measurements, for VOC measure ments, but from our perspective, above all, for a combination of both measurands. The crucial factor in this respect is that both of these measurands are not convertible into each other and derivations to or from one another cannot be made. An NDIR CO2 measuring instrument measures selectively and cannot detect any VOC; a VOC mixed gas sensor cannot recognize CO2 molecules.

436,56 € net
Voltage supply 24 V AC ⁄ DC (± 10 %)
Power consumption < 4.4 W ⁄ 24 V DC typical; < 6.4 VA ⁄ 24 V AC typical;
peak current 200 mA
Data points temperature, relative humidity,
air quality (VOC), carbon dioxide (CO2),
atmospheric pressure
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
Measuring accuracy, VOC ± 20 % of final value (referred to calibrating gas)
Service life > 60 months (under normal load conditions)
Measuring range, CO2 0...5000 ppm
Sensor, CO2 optical NDIR sensor (non-dispersive infra-red technology)
with automatic and manual calibration
Measuring accuracy, CO2 ± 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
Response time < 2 minutes
Ambient temperature –10...+60 °C
Bus protocol Modbus (RTU mode),
address range 0...247 selectable
Signal filtering 4 s / 32 s
Process connection by screws
Protective tube stainless steel, Ø 16 mm, NL = 55 mm
Electrical connection 0.14 - 1.5 mm2, via push-in terminal
Enclosure plastic, UV-stabilised,
material polyamide, 30 % glass-globe reinforced,
with quick-locking screws
(slotted ⁄ Phillips head - combination),
colour traffic white (similar to RAL 9016)
Enclosure dimensions 126 x 90 x 50 mm (Tyr 2)
Cable gland 2x 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)
Standards CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014 ⁄ 30 ⁄ EU
Type Item No. Price
KA-2 1906-1200-0000-100 0,00 €

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ISH Messe Frankfurt – S+S Regeltechnik looks forward to meeting you!
10. - 15.03.2019

Stand 10.3 A71
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