AZ Instruments Digita CO RH Humidity Temperature Data Logger Meter IAQ Tester

This unit uses NDIR (non-dispersive infrared) technology to ensure the reliability and long term stability. It's useful in verifying HVAC system performance and air ventilation control. It has notifications(~80db) threshold setting. Plus it includes Max, Min, TWA, STEL functions. Mini USB for PC download function for analysis.

Features:
With blue backlight to use in dark area
One touch to display CO2 / Dew point temperature / Wet bulb temperature / Air temperature / Humidity / CO in turns.
Programmable notifications CO level
Long time drift compensation on CO2 sensor
Hold function freezes current readings
Easy to manually calibrate C02 at fresh air around 380-420ppm

Specifications:
Accuracy :
*CO2 : ±30ppm ±5% of reading ( 0~5000ppm)
other ranges are not specified
*CO : +/-10ppm for les than 100ppm
+/-10% or reading for 101~500ppm
+/-20% of reading for 501ppm and above
*Temperature : ±0.6°C / ±0.9°F
*Relative Humidity : ±3%RH (at 25°C, 10-90%RH); ±5%RH (at 25°C,other range)
Response time:
*CO2 : <30 seconds (90% step change)
; *CO : <60 seconds (90% step change)
; *Temp : <2 mins (90% step change)
; *RH : <10 minutes (90% step change)
t; LCD Meter size (mm) : 26(H) x 44(L), 205(L) x 70(W) x 56(H)
Operating condition : -20 to 50°C (C02 sensor),0 to 50°C (CO sensor)
*(avoid condensation) -20 to 60°C (for the rest parameters
Storage condition: -20~60°C , 10~90%RH (avoid condensation)
Power supply : AA x 4pcs (not included) or 9V adaptor (not included)
*battery life : >24 hours (alkaline battery)
*Weight : 200g

Set includes:
1 x 4-in-1 IAQ Meter
1 x English Manual
1 x USB cable
1 x CD software
1 x Carrying case