●【4-in-1】Real-Time Data of  PM2.5, CO2, temperature & humidity 
●【Real-time data monitoring】 Quickly monitor and LCD display
●【Nicer stability】 NDIR,MEMS , and Infrared LED sensor
●【Sensor protected】Anti-condensation and nicer long-term stability
●【Operate easy】 Remote monitoring data via Modbus RS-485 digital output
●【Install Quickly】Compact size and elegant outlook and easy to install on the wall
●【Data logger software】Free programmable software to monitor and record
    local data via RS-485

Measuring range 
Temp.:0~50℃
Humidity:0~100%
CO2:0~2000ppm
PM2.5:0 ~ 500 ㎍/m3
Accuracy
Temp.:±0.4℃
Humidity:± 3 % RH ( at 20~90%)
CO2:±40 PPM ± 3 % of Reading
PM2.5:± 10 ug/m3, ±5% of Reading
Output
Signal output:RS-485
Protocol:Protocol
Signal connection
3-wire
Power supply
AC : 24 ± 10 %;DC : 12 …36V
Protection degree
IP20