DC Power Supply(default):10-30VDC

Max Power Consumption: Output Current 1.2W 
Max Power Consumption: Output Voltage 1.2W 
Measuring range:   Humidity 0%RH~100%RH
                          Temperature:-40°C ~80°C
                           CO2 concentration: 0~5000ppm
Accuracy: +- (40ppm + 3% F . S) 25°C
WorKing Temperature: -20°C~ + 60°C ， 0%RH ~80%RH
Long term stability <= 30PPM/y
Response time<= 10s (1m/s wind speed)
System appointment time: 2min (available),10min (maximum precision)
Output Signal:Current output (4mA ~20mA)
                 Voltage output (0~5V/0~10V) 
load Capacity: Voltage Output: Output Resistance <= 250 Ohm
                     Current output: <= 600 Ohm
 

Wire Connection:
Brown: Power supply positive VDD 10-30V DC
Blue:Carbon dioxide signals positive
Black:Power supply negative 
green:Carbon dioxide signals negative

Has following 4 wire type out put :

3 wire current output type 

3 wire voltage output type
4 wire current output type
4 wire voltage output type