High Accuracy CO2/ RH/Temp 3 in 1 Handheld Meter, 9999 ppm, Portable Indoor Air Quality Carbon Dioxide Sensor Detector Tester, Temperature/Dew Point/Wet Bulb/Humidity

Features:
Triple displays of CO2 level, temperature and Humidity
Stable NDIR sensor for CO2 detection
Statistics of weighted averages
*TWA (8 hours weighted average)
*STEL (15 minutes weighted average)
Audible CO2 warning alarm
Battery and adaptor power supply
Easy manual calibration on CO2 and humidity
PC connect via RS232 interface

Specifications:
Measuring Range :
  *CO2: 0~9999ppm
   *(5001~9999 out of scale)
  *Temperature : -10~60°C (14~140°F)
  *Humidity : 0.1% ~ 99.9%RH
  *Dew Point : -20.0~59.9°C
  *Wet Bulb : -5.0~59.9°C
Resolution : 1ppm,0.1°C/°F, 0.1%RH
Accuracy :
  *C02 : ±30ppm ±5% (0~5000ppm)
  *Temp : ±0.6°C / ±0.9°F
Humidity : ±3%RH (at 25°C, 10~90% RH);
±5%RH (at 25°C, others)
Warm-up time : 30 seconds
Response time
  *CO2 : <30 seconds (90% step change)
  *Temp : <2 mins (90% step change)
  *RH : <10 mins (90% step change)
NO RELAY
LCD size : 26*44mm
Operating condition : 0~50°C, 0~95%RH (avoid condensation)
Storage Condition : -20~50°C, 0~95%RH (avoid condensation)
Power Supply : 4 x AA batteries
Battery life : >24 hours (alkaline batteries)
Meter size : 205 x 70 x 56mm ( L*W*H)
Weight : 200g

Set Includes:
1 x Portable CO2 meter
4 x AA batteries
1 x English Manual
Hard Carrying Case