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ModBUS sensor for indirect CO2 and air quality measurement

People spend 90% of their time indoors, where the presence of gaseous pollutants, - volatile organic compounds (VOC), - is significantly higher than in open spaces. In these high density environments, such as offices, schools, hospitals and in general in public places, especially in modern buildings, the exchange of air is scarce and favors the increase in the concentration of carbon dioxide (CO2) produced by people.

All this affects people's well-being by promoting health problems, a decrease in concentration and production capacity.

The KET-AIR-210 works according to the indirect method of measuring CO2, equipped with a sensor in MOX technology, measures the quantity of hydrogen and from that estimates the quantity of CO2. In addition, combined with the sensor that measures the percentage of Volatile Organic Compounds (VOC), allowing you to take the necessary measures to increase and improve the efficiency of ventilation and air purification.

The KET-AIR-210 is also complete with high precision Temperature, Relative Humidity and Light sensors, with an RS485 ModBUS RTU Slave interface.

The .DY version with display offers users a lot of information on the degree of thermal comfort present in the environment. The innovative zero-consumption e-ink display guarantees excellent readability and allows continuous display of the parameters.

The .TS version allows the user to set the desired degree of comfort.

KET-AIR-210 is equipped with an internal memory (.DL version) that allows to store more than 60,000 information in case of interruption in data communication, retransmitting them automatically as soon as possible.

Designed to easily integrate into supervision and energy management systems (BMS / BEMS) it provides a simple user interface. Suitable for use in public environments supports keyboard lock and limitation of active functions.

 

 

GENERAL SPECIFICATIONS
Protection Range IP40
Operative Temperature -10 ÷ +60 °C
Storage Temperature -15 ÷ +60 °C
Relative Humidity MAX 80% not condensing
CASE
Dimensions 100 x 100 x 22.5 mm (W x H x D)
Mounting Panel mounting with supplied supports
Material ABS, self extinguishing: UL 94 V-O
POWER SUPPLY
Supply Voltage 5 ÷ 12 VDC
Connectors types Removable spring clamps
DATALOGGER FUNCTION
Memory Type Internal Flash (only for .DL version)
Data Storage Capacity Retention of more than 60,000 data with date and hour even if there is no connection
RS485 INTERFACE
Supported Protocols ModBUS RTU Slave
Communication Rate 9.6, 19.2, 38.4 o 57.6 Kpbs
Connectors types Removable spring clamps
RADIO MODULE
Supported Protocols X-Monitor Protocol (X-MP) / IEEE 802.15.4
Radio Frequency 2.4 GHz ISM Band
Output Power +3 ÷ +20 dBm
Sensitivity -101 dBm
Antenna Type 1 internal
Max Distance (Free Air) Over 600 m
FUNCTIONALITY
Firmware Upgrade Via USB C connector
User mednu Thermostat function with temperature summer / winter mode, comfort / saving / off mode, air speed setting, (only .TS version)
Support for public environment Anti-removal support, keyboard lock
TEMPERATURE SENSOR
Sensor Type Digital
Measure Range -40 ÷ +123.8 °C
Precision ±0.4 ÷ 25 °C
Repeatability ±0.1 °C
Resolution ±0.01 °C
HUMIDITY SENSOR
Measure Range 0 ÷ 100%RH
Precision ±3%RH from 20 to 80%RH
Repeatability ±0.1%RH
Resolution ±0.03%RH
Hysteresis ±1%RH
Long Period Stability <0.5%RH/year
LIGHT SENSOR
Number of sensors 2, on front and on top
Measure Range 10 ÷ 1000 Lux
Response Curve Similar to that of the human eye
VOLATILE ORGANICS COMPOUNDS SENSOR
Measure Range 0 ÷ 60000 ppb
Accuracy ±15% ppb
Resolution ±0.2% ppb
CO2 SENSOR
Principle of Operation Indirect
Measure Range 400 ÷ 60000 ppm
Accuracy ±10% ppm
Resolution ±0.2% ppm
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