Instrument - O3NOxTRH

Short name:

Full name:

What is being measured:
combination ozone, NOx, temperature, RH

Sampling Protocol:

Horiba for O3, Teledyne for NOx, Vaisala for T/RH

Horiba APOA, TeledyneT200, Vaisala HMM211

Instrument year :
None specified

Data recording software:

Data analysis software:

Raw data time resolution:
0.5 min

Analysis data averaging:

Detection limit:
0.5ppb for O3/NOx, 0.1degC, 3% RH

Sensitivity to temperature (and correction method, if applicable): :
0.02 RH% per degC

Sensitivity to relative humidity (and correction method, if applicable): :
NOx instrument is very sensitive to RH. After RH is introduced you will see NOx off gassing off the Mo catalyst. There is no correction, just have to let the instrument equilibrate at the desired RH

Sampling method:
Direct sampling

Sample preparation method:

Sample residence time (chamber to instrument) (seconds):

Length of tubing (cm):

Instrument flow rate:
1 lpm for O3/NOx

Tubing inner diameter:

Tubing material:
FEP Teflon

Chemical identification method:
Photometric for O3, chemiluminescence for NOx

Data analysis method:

Quantification method:
Factory calibration

Calibration method:
Factory calibration

Calibration drift estimate:
Low (on the order of weeks)

Calibration schedule:
As Needed

Uncertainty estimation method:
From manufacturer

Known interferences:
O3 has interference from H2O2, NOx has interference from NOy

Link to supplemental information:

Additional notes:

Measurement uncertainty:
10% for O3/NOx, 0.1 degC for T, 3% for RH

Measurement units:
O3 (ppb), NO (ppb), NO2 (ppb), T (Celsius), RH (%)