Duct humidity, tempe­rature, air quality and CO2 sensor
AERASGARD® KFTM-LQ-CO2-W

AERASGARD® KFTM-LQ-CO2-W

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

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.

CO2: 0...2000ppm / 5000ppm switchable, VOC: 0...100%
Temperature: -35°C...+80°C, Humidity: 0...100% r.H.
Output: 0-10V / 4...20mA switchable, with Changeover contact

Type Kommunikation Equipment Display CO2 measuring range 1. Temperature range Arbeitsdruck PN max. Buttons Cable connection Colour Control Function Housing Colour Housing_material Kommunikation Measuring range relative humidity Messbereiche CO2 Movement Output Output type Printing Prozessanschluß (SW) Rod length Rohr Ø DN Schutzart(Filter) Sensor-Toleranz Feuchte Sleeve length Temperature-measuring range for insertion length Channels Sensor VOC measuring range Free cable length Housing name Cable material Measuring range pressure Item No. Price
KFTM-LQ-CO2-W change over contact 5000 ppm CO2 1501-8118-7301-200 414,12 €
KFTM-LQ-CO2-W LCD change over contact 5000 ppm CO2 1501-8118-7371-200 454,12 €