Thank you very much for your fast response!
So, it looks that this sensor is useless… I also found, that when I put a test gas to the sensor (for example CO), all four parameters go up to 1000 ppm. So, it doesn’t matter what I give to the sensor - it react for all parameters! My last try was with alcohol. The results are:
VOC: 999 ppm
CO: 999 ppm
NO2: 999 ppm
C2H5CH: 999 ppm
Regards!