● Integrated 3 sensors in 1 device with optional LCD display
● Measuring temperature, humidity and carbon dioxide
● 2 analog outputs or Modbus RS-485
● Optional analogue output + RS-485
● Quick easy installation and maintenance due to well designed
● Cost-efficient and reliable
● Data can be logged and transferred to pc via RS-485 function link free software

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
analogue 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.
temperarture influence :  T & H : max. -0.15 % RH / ℃ ( 0 ℃ to 80 ℃)
response time : 
CO2 : t 90 < 2 min.
T & H : t 63 ( 15 ℃ to 45 ℃ / 33 to 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 : ± 0.4 ℃
humidity : ± 3 % RH ( 20 ... 90 % RH )
environment
media measured  : air
working temp. / humidity for T & H : 0 ... 50 ℃  / 0 ... 95 % ( 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 : analogue & 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 ) 
weigjt : 100 g