No2 nitrogen dioxide sensor adopts imported sensor chip, which is used to detect the concentration of nitrogen dioxide in various environments. It has the characteristics of high precision and good stability. Range: 0 ~ 20ppm resolution: 1ppm power supply mode: DC12V / 24V wiring mode: voltage type: 3-wire, current type: 3-wire, RS-485 signal: 4-wire signal output: voltage type: 0 ~ 5V DC, current type: 4 ~ 20 mA RS-485 signal: support Modbus Protocol (baud rate 9600 can be set, address 0-255 can be set) response time: < 20s, Measurement stability time: 30s sensor type: electrochemical working mode: continuous working temperature range: - 20 ℃ ~ 50 ℃ humidity range: 15% ~ 95% (RH) non condensing overall dimension: 144MM × 190mm × 74mm weight: about 1130g