Specification :

Measured specifications
Temperature
Range: -20 ° C to 50 ° C ( -5 ° F to 122 ° F)
Display resolution: 0.1 ° C ( 0.1 ° F)
Accuracy: ± 0.9 ° C/ ± 1.62° F from 40 ° C to 60 ° C
± 0.5 ° C/ ± 1.00° F from 5 ° C to 40 ° C
± 1.1 ° C/ ± 1.98 ° F from -20 ° C to 5 ° C
Relative humidity
Range: 10 % to 90 % RH, non-condensing
Display Resolution: 1%
Accuracy: ± 2 % RH ( 10 % RH to 90 % RH)
Air velocity
Range: 50.0 fpm to 3000 fpm
0.25 m/ sec to 15 m/ sec
Display Resolution: 1 fpm ( 0.005m/ sec)
Accuracy: ± 4 % or 4 fpm*
± 4 % or 0.02 m/ sec* whichever is greater
* Accuracy specification only valid for velocity readings above 50 fpm.
C0
Range: 0 to 500 ppm
Display Resolution: 1 ppm
Accuracy: ± 5 % or ± 3 ppm, whichever is greater, @ 20 ° C and
50 % RH
C02
Range: 0 to 5000 ppm
Display Resolution:
1 ppm
Accuracy: Warm up time 1 min ( 5 minutes for full specification) 2.75% + 75 ppm

Calculated specifications
Dew point temperature
Range: -44 ° C to 50 ° C, ( -47 ° F to 122 ° F)
Display Resolution: 0.1 ° C ( 0.1 ° F)
Accuracy: ± 1 ° C when temp: -20 ° C to 50 ° C RH: 40 % to 90 %
± 2 ° C when temp: -20 ° C to 50 ° C RH: 20 % to 40 %
± 4 ° C when RH: 10 % to 20 %
Wet bulb temperature
Range: -16 ° C to 50 ° C, ( 3 ° F to 122 ° F)
Display Resolution: 0.1 ° C, ( 0.1 ° F)
Accuracy: ± 1.2 ° C when RH: 20 % to 90 % temp: -20 ° C to 60 ° C
± 2.1 ° C when RH: 10 % to 20 %
Volume flow rate ( in a duct)
Range: 0 to 3, 965 M3/ m, ( 0 to 140, 000 cfm)
Display Resolution: 0.001 M3/ min, ( 1 cfm)
Accuracy: N/ A: The volume flow calculation will be a simple average of the data points times the duct area
% outside air ( based on temperature)
Range: 0 to 100%
Display Resolution: 0.1
% outside air ( based on CO2)
Range: 0 to 100 %
Display Resolution: 0.1 % N/ A

General specifications
Operating and storage temperature:
-20 ° C to 50 ° C ( -4 ° F to 122 ° F)
Humidity
10 % to 90 % ( non-condensing)
Altitude
Up to 2000 m ( 6562 ft)
Shock and vibration
MIL-PRF-28800F: Class 2
Multi-language interface
English, French, Spanish, Portuguese and German
Battery
Rechargeable Li-Ion ( primary) , three-AA ( backup)
Data logging
25, 000 records ( continuous) , 99 records ( discrete)
Warranty
Two-years