KLSWxx with display

The electronic airflow monitor RHEASGARD KLGF measures the flow velocity in m/s and converts the measurement signal to a standard signal of 0-10 V (relative) (flow measuring transducer). The flow sensor available with/without an optional display.

The RHEASREG KLSW provided with a switching output (one-step or two-step) is designed as flow sensor/flow monitor. Fine adjustment of the measuring range end value by the user is possible with the help of a potentiometer.

The airflow monitor/airflow sensor is used for monitoring or controlling airflows in ducts, at ventilators and dampers, for flow-dependent monitoring of humidifiers and electric heating registers according to DIN 57100, part 420, or for use in connection with DDC systems.

The maintenance-free microprocessor-controlled room sensor AERASGARD RLQ-W & RLQ-W-A with automatic and manual calibration is used for determining the air quality or the air quality based on a mixed gas sensor/VOC sensor. The measurement values are converted into standard signals of 0-10 V or 4...20 mA. Optional with traffic light indicator (five coloured LEDs).

Elegant enclosure made of plastic, with snap-on lid, base with 4-hole attachment, for installation on vertically or horizontally installed flush-mounted boxes, with predetermined breaking point for surface-mounted connection or in enclosure made of stainless steel (top and bottom parts are stainless steel, the cover is screwed on), vandal-proof version e.g. for schools, barracks and public buildings.

It is used:
- For air quality measurement in offices, hotels, meeting rooms and convention centres, apartments, stores, and restaurants, etc.
- For quantitative evaluation of room air pollution with contaminating gases (cigarette smoke, body perspiration, exhaled breathing air, solvent vapours, emissions from building members and cleaning agents).
- For adjustable sensitivity regarding the maximum air contamination to be expected.
- For room ventilation as-needed, enabled by air changes only taking place when air is polluted while conserving energy at the same time.

The sensor's service life depends on the type of burden and gas concentration and is more than 60 months under normal load conditions. The new design allows you to choose between three sensitivity ranges that are adjusted using DIP switches, giving you three measuring ranges: LOW for low, MEDIUM (default) for medium, and HIGH for high VOC sensitivity. VOC is the abbreviation for volatile organic compounds. According to the definition by the World Health Organization WHO, VOC are organic substances with a boiling range from +60 to +250 °C. Examples of VOCs include compounds of the substance groups alkanes/alkenes, aromatic compounds, terpenes, halogenated hydrocarbons, esters, aldehydes, and ketones. There is a large number of naturally occurring VOCs, some of which are also released into the atmosphere in substantial quantities, e.g. terpenes and isoprene from forests. For more information, please refer to beginning of this chapter.

RCO2-W-A with LEDs

The maintenance-free microprocessor-controlled room sensor AERASGARD RCO2-W & RCO2-W-A with automatic and manual calibration is used for detecting the CO2 content of the air within a range of 0...2000 ppm or 0...5000 ppm. The measurement values are converted into standard signals of 0-10 V or 4...20 mA. Optional with traffic light indicator (five coloured LEDs) or with display (see RFTM-LQ-CO2).

Elegant enclosure made of plastic, with snap-on lid, based with 4-hole attachment, for installation on vertically or horizontally installed flush-mounted boxes, with predetermined breaking point for surface-mounted connection or in enclosure made of stainless steel (top and bottom parts are stainless steel, the cover is screwed on), vandal-proof version e.g. for schools, barracks and public buildings.

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

The maintenance-free microprocessor-controlled AERASGARD RFTM-LQ-CO2 and RCO2-W is used to monitor the entire room climate. In order to do this, the measurands air humidity, temperature, CO2 concentration as well as air quality (VOC) are measured. All parameters are converted to standard signals (0-10 V or 4...20 mA). As an option, a measurand can be shown continuously in the illuminated display. By measuring all four measurands in one device, it is possible to monitor and control the entire indoor climate effectively.

The RFTM-LQ-CO2 and RCO2-W measures CO2 in the range from 0...2000 ppm or 0...5000 ppm, VOC in one of three selectable sensitivity levels LOW/MEDIUM (default)/HIGH, temperatures in the range from 0...+50°C as well as the relative air humidity of 0...100 %. Elegant housing made of plastic, with snap-on lid, base with 4-hole attachment, for fitting to vertically or horizontally installed flush-mounted boxes, with predetermined breaking point for surface-mounted connection. Relative humidity (% r.H.) is the quotient of water vapour partial pressure divided by the saturation vapour pressure at the respective gas temperature. A digital, long-term stable sensor as a measuring element for relative humidity and temperature guarantees exact measurement results. The air quality is determined based on a (VOC) mixed gas sensor. The CO2 content of the air is determined by means of optical NDIR sensors (non-dispersive infra-red technology).

Patented quality product

The maintenance-free microprocessor-controlled duct sensor AERASGARD KFTM-LQ-CO2-W and KLQ-CO2-W with automatic and manual calibration is used for detecting the overall room climate. It measures CO2 within a range of 0...2000 ppm or 0...5000 ppm, air quality (VOC) in one of three s ensitivity levels that can be selected LOW/MEDIUM (default)/HIGH, temperature within a range of -35...+80°C as well as relative humidity from 0...100 % r.H. The measured values are converted into standard signals of 0-10 V or 4...20 mA (selectable via DIP switches). As an option, the measured values can be shown continuously in the illuminated display.

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 measurem ents, 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.