Chemical Cross Sensitivities CH4 to SO2

Part Number CH4
conc.
CH4
error
CO
conc.
CO
error
CO2
conc.
CO2
error
CS2
conc.
CS2
error
H2S
conc.
H2S
error
NH3
conc.
NH3
error
NO
conc.
NO
error
NO2
conc.
NO2
error
SO2
conc.
SO2
error
CO2-0.25–3.0%5 2.5% 0 1.5%           0.2% 0.5% 5% 0 100 0     3.5% 1.1%
CO2-0.5–10.0%5 2.5% 0 1.5% 03         0.2% 0.5%             3.5% 1.1%
CO2-1–20%5 2.5% 0 1.5%           100
0.2%
0
0.5%
300 0 100 0     200
3.5%
0
1.1%
CO2-5–60%5 2.5% 0 3.8% 0         1% 0 500 0 100 0     3.5% 0
CO2-150–2500PPM5     3000 0             50000 0 100 0 200 0 2050 0
H2O-0.1–2.0MGL 99.9% 0 200 0 3000 0     2000 0                
H2O-1–18MGL 99.9% 0 200 0 3000 0     2000 0                
H2O-1–30MGL 99.9% 0 200 0 3000 0     2000 0                
H2O-2–10LBMMCF 99.9% 0 200 0 3000 0     2000 0                
H2O-6–40LBMMCF 99.9% 0 200 0 3000 0     2000 0                
H2S-0.1–2.0% 2.5% 0 3000 0     100 0     300 0 100 0 200 0 20 0
H2S-0.2–7.0% 2.5% 0 3000 0     40% 0     300 0 2550 0 1020 0 30 0
H2S-0.5–4.0% 2.5% 0 3000 0     40% 0     300 0 2550 0 1020 0 30 0
H2S-0.5–10.0%     3000 0             300 0     200 0    
H2S-2–40% 2.5% 0 250 0     5% 0     10% 1.3%         10 0
H2S-1–30PPM 25000 0 250 0     100 0     300 0     200 0 20
1800
0
H2S-2.5–60PPM 25000 0 250 0     100 0     300 0     200 0 20
1800
0
H2S-5–100PPM 25000 0 250 0             100 0     200 0    
H2S-10–250PPM 25000 0         100 0     300 0            
H2S-50–800PPM 25000 0 250 0     100 0     300 0     200 0 20 0
H2S-100–2000PPM 25000 0 250 0     100 0     300 0     200 0 20 0
PH3-0.1–10PPM 25000 0 100 0 50000 0.05     50 >2.52 100 ≤0.1         200 0

Notes:

  1. t-Butyl Mercaptan
  2. Interferes
  3. Color darkens
  4. Dark blue ring
  5. Acid gases such as HCl give a positive response when coexisting.