Monitor room O3 level as well as room temperature and humidity Programmable logical controller and transmitter RS-485 communication interface and independent base address available Wall mount with LCD display     Features:   1) Real time detecting ozone gas, wide detection range. 2)   Real time detecting temperature and humidity detection available 3) Wall mount with LCD display 4) Measured range ozone:10ppb~1000ppb; temperature: 5~45 ℃ ;  humidity:5 ～ 95%RH 5) Japanese semiconductor sensor inside, high sensitivity to ozone gas 6) Low power consumption 7) Microprocessor control with quickly response 8) 1X relay dry-contact output. 9) RS-485 communication interface, 15KV antistatic protection, independent base address setting 10) Humidity detection optional