Display
Display : LCD module without backlight
Display readout : double line character ( up : CO2；down : temperature & humidity take turns )
Digit : CO2 : 4 digits；T & H : 3 digits & 1 decimal
Digit height : 17.84 mm
Input
CO2 : NDIR sensor
Temperature & humidity : MEMS sensor
Measuring range
CO2 : 0 ... 2000 PPM
Temperature : 0 ... 50 ℃
Humidity : 0 ... 100 %RH ( non-condensing )
Output
Analog output : 0 ... 5 V / 0 ... 10 V / 4 ... 20 mA
Modbus : RS-485
Signal connection : 3-wire
Load resistance ( voltage ) : voltage output : ≧ 10KΩ ; current output : < 250 Ω
Warm-up time : < 2 min.，stable time 20 mins.
Temperature influence : T & H : max. -0.15 % RH / ℃ ( 0 ... 80 ℃)
Response time :
CO2 : t 90 < 2 min.
T & H : t 63 ( 15 ... 45 ℃ / 33... 75 %RH ) ≦ 10 sec.
Sampling time : CO2 : about 6 secs. ； T & H : about 3 secs.
Data logger : via RS-485 by using eyc free software
Accuracy ( at +25 °C ；V = 24 VDC；101.3kPa )
CO2 : ± 40 PPM ± 3 % of reading
Temperature : ± 0.5 ℃
Humidity : ± 5 % RH ( 30 ... 80 % RH )
Environment
Media measured : air
Working temp. / humidity for T & H : 0 ... 50 ℃ / 0 ... 100 % ( non-cond. )
Working temp. / humidity for CO2 : 0 ... 50 ℃ / 0 ... 85 %
Storage temperature : -20 ... + 60 ℃
Electrical
Power supply : DC 12 ... 36 V & AC 24 V ± 10 %
Current consumption : DC 24V : 150 mA；AC 12 V : 120 mA
Starting current : DC 24V : 250 mA；DC 12 V : 550 mA；
AC 24V : 230 mA ; AC 12V : 250 mA
Electrical connection : analog & communication : 4P connector
Installation
Wall
Protection
Protection degree : IP 20
Electric protection : polarity protection, short circuit
Certification
CE
Material
Case : PC ( PC - 110 ) ( UL94V-2 )
Weight : 100 g

● Monitoring the air quality in indoor environments
● HVAC / air conditioning / museums / greenhouse / testing environments work places / supermarkets /
● Data centers / production wharehouses / indoor public / places to regulate the ventilation system to save energy.