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ESERA GmbH 2021
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11165 V1.0 R1.1 Manual
Page 4 of 8
Air Quality Sensor (VOC)
mixed gas sensor (VOC)
Measuring range
400 - 1800 ppm (CO2 equivalent)
Accuracy
+/- 10%, depending on air composition
Data output
30-250mV corresponds to 400-2900ppm, 1mV output voltage
corresponds to 11,6ppm. Smallest output value: 30,51mV
corresponds to 405ppm.
Interface
3 - conductor connection (Data, Ground and 5V, Parasitic operation not
supported).
Connection
Push-In terminals for cable solid 0.2 to 2.5qmm or
fine stranded 0,2 to 1,5qmm. For the connection we recommend
slotted screwdriver size 2,5x75
1-Wire interface
based on DS2438 command set
Operating voltage
5 V= (+10%/-20%)
Current consumption
ca. 20mA
5
Ambient conditions
Protection system
IP20
Protection class
III
Temperature,Operation
-25°C to 50°C, (Limitation of max. temperature to 50°C by air quality
sensor and sensor housing)
Air Quality Sensor
operating range 0 bis 50°C
Air Humidity
5 to 95% (non condensing)
Storage temperature
-25°C to 50°C
Dimensions (outside)
71 x 71 x 32mm (LxWxH)
6
Conformity
EN 50090-2-2
EN 61000-4-2, ESD
EN 61000-4-3, HF
EN 61000-4-4, Burst
EN 61000-4-5, Surge
EN 61000-6-1, interference immunity
EN 61000-6-3, interference radiation
RoHS/REACH
7
Software / control
The 1-Wire Multisensor Pro II is read out via 1-Wire command for DS2438 devices. The Multisensor is
supported in many controllers, such as ESERA-Station, Loxone, IP-Symcon, OWFS, FHEM, (Linux) or
microcontroller applications.
For ESERA 1-Wire Multisensor of the Pro Series no complex formulas are necessary anymore.
A sensor controller within the Multisensor takes over the preprocessing of all measured values and thus
simplifies the integration into 1-Wire systems enormously. Complex formulas are no longer necessary.
Also, the measured values are no longer dependent on the operating voltage of the 1-Wire Multisensor.
The sensor measurement values are assigned to the standard DS2438 device values (according to the data
sheet) as follows:
VDD = operating voltage (5V), VAD = humidity, Xsens = air quality.
Calculations:
Temperature:
Standard output according to DS2438 module
Operating voltage:
Standard output according to DS2438 module
Air Humidity:
To obtain the rel. humidity in percent, multiply the output value (Vas) by a factor of 10.
0.1V corresponds to 1% relative humidity
Air quality:
The air quality is output in accordance (equivalent) to CO2 sensors.
After start-up, the sensor outputs 0V for a few minutes. This means that the air quality sensor is in the start-
up phase.
