Oldham OLCT 20 - Cross Gas Factors for Combustible Gases

8 – Technical Specifications
21
Gas type
Measure-
ment range
(ppm)
Explosion
-proof
sensor
Intrinsically
-safe
sensor
Temp.
range (°C)
% RH
Accuracy (ppm)
Average
service life
(months)
Resp. time
T50/T90 (s)
Storage
conditions
and time
Freon R410a
1000

-20 to +55
20 - 95
+/- 15% (from 20-
70% PE)
40
25/90
(d)
Freon R32
1000

-20 to +55
20 - 95
+/- 15% (from 20-
70% PE)
40
25/90
(d)
Freon R407c
1000

-20 to +55
20 - 95
+/- 15% (from 20-
70% PE)
40
25/90
(d)
Freon R408a
1000

-20 to +55
20 - 95
+/- 15% (from 20-
70% PE)
40
25/90
(d)
Ethanol
500

-20 to +55
20 - 95
+/- 15% (from 20-
70% PE)
40
25/60
(d)
Toluene
500

-20 to +55
20 - 95
+/- 15% (from 20-
70% PE)
40
25/60
(d)
Isopropanol
500

-20 to +55
20 - 95
+/- 15% (from 20-
70% PE)
40
25/60
(d)
2-butanone
(MEK)
500

-20 to +55
20 - 95
+/- 15% (from 20-
70% PE)
40
25/60
(d)
Xylene
500

-20 to +55
20 - 95
+/- 15% (from 20-
70% PE)
40
25/60
(d)
a) +4°C to +20°C
20% to 60% RH
1 bar ± 10%
6 months maximum
b) -25°C to +60°C
20% to 60% RH
1 bar ± 10%
6 months maximum
(c) +4°C to +20°C
20% to 60% RH
1 bar ± 10%
3 months maximum
(d) -20°C to +50°C
20% to 60% RH
1 bar ± 10%
6 months maximum
Cross gas factors for combustible gases
It is recommended that the detector is calibrated using the gas to be measured.
Users wishing to calibrate the detector using a gas other that detected and
factory-programmed should refer to the following table, and use the
recommended gas and corresponding coefficient.
Poison resistant catalytic sensor, type 4F
Gas
Methane
Pentane
Hydrogen
Acetone
1.80
0.90
Acetylene
1.40
0.70
Ammonia
1.00
0.50
Benzene
2.10
1.05
n-Butane
1.80
0.90
Ethane
1.40
0.70
Ethanol
1.60
0.80
Ethylene
1.40
0.70
n-Hexane
2.85
1.40
Hydrogen
1.00
Isopropanol
1.80
0.90
JP-4
3.00
1.50
JP-5
3.10
1.55
JP-8
3.20
1.60
Methane
1.00
Methanol
1.35
0.65
n-Pentane
2.00
1.00
Propane
1.60
0.80
Styrene
2.40
1.20
Toluene
2.50
1.25
Xylene
2.40
1.20