Technical data

-31-
Sensor specification
MK208-1 Catalytic combustion sensor for combustible gases and vapors (according to EN 61779-4)
Response time t
50
: ≤ 5 s (CH
4
), ≤ 5 s (C
3
H
8
), *1 with wind protection: ≤ 8 s (CH
4
), ≤ 8 s (C
3
H
8
), *1
t
90
: ≤ 9 s (CH
4
), ≤10 s (C
3
H
8
), *1 with wind protection: ≤15 s (CH
4
), ≤17 s (C
3
H
8
), *1
Flow rate 0...6m/s:
max. ±3% of detection range or ±10% of display (regarding to 0 m/s) *2, *4
Pressure 800...1100 hPa:
max. ±3% of detection range or ±7% of display (regarding to 1000 hPa) *4
Humidity 5%...90% r.F.:
max. ±5% of detection range or ±10% of display (regarding to 50% r.F. and 40°C) *4
Temperature -25...+55°C:
max. ±5% of detection range or ±15% of display (regarding to 20°C) *4
Cross sensitivities
at 50%LEL:
at 2 %Vol NH3:
Methane – Measuring range
(#) *3
.
2,20 %Vol. CH
4
: = 100%
2,00 %Vol. H
2
: ca.131%
1,25 %Vol. C
3
H
6
O: ca. 97%
1,15 %Vol. C
2
H
4
: ca. 96%
0,85 %Vol. C
3
H
8
: ca. 96%
1,10 %Vol. C
4
H
8
O
2
: ca. 92%
1,00 %Vol. C
3
H
8
O: ca. 87%
0,85 %Vol. C
4
H
10
O: ca. 87%
0,50 %Vol. C
6
H
14
: ca. 74%
0,55 %Vol. C
7
H
8
: ca. 72%
0,35 %Vol. C
9
H
20
: ca. 57%
2,00 %Vol. NH
3
: ca. 57%
Propane – Measuring range *3
.
0,85 %Vol. C
3
H
8
: = 100%
2,00 %Vol. H
2
: ca.160%
1,25 %Vol. C
3
H
6
O: ca.111%
2,20 %Vol. CH
4
: ca.107%
1,15 %Vol. C
2
H
4
: ca.101%
1,10 %Vol. C
4
H
8
O
2
: ca. 95%
1,00 %Vol. C
3
H
8
O: ca. 93%
0,85 %Vol. C
4
H
10
O: ca. 87%
0,50 %Vol. C
6
H
14
: ca. 69%
0,55 %Vol. C
7
H
8
: ca. 67%
0,35 %Vol. C
9
H
20
: ca. 49%
2,00 %Vol. NH
3
: ca. 49%
Nonane – Measuring range
(#) *3 .
0,35 %Vol. C
9
H
20
: = 100%
2,00 %Vol. H
2
: ca.328%
1,25 %Vol. C
3
H
6
O: ca.231%
2,20 %Vol. CH
4
: ca.224%
1,15 %Vol. C
2
H
4
: ca.213%
0,85 %Vol. C
3
H
8
: ca.210%
1,10 %Vol. C
4
H
8
O
2
: ca.201%
1,00 %Vol. C
3
H
8
O: ca.193%
0,85 %Vol. C
4
H
10
O: ca.180%
0,50 %Vol. C
6
H
14
: ca.143%
0,55 %Vol. C
7
H
8
: ca.132%
2,00 %Vol. NH
3
: ca.100%
Special notes: This sensor is not suitable for the detection of hydrogen and for the use in hydrogenous areas. The sensor responds to
hydrogen, but is only suitable for warning of this gas. Permanent exposure to hydrogen may result in a permanently
rising signal.
Expected lifetime: 5 years
MK217-1 Catalytic combustion sensor for combustible gases and vapors (according to EN 61779-4)
Response time t
50
: ≤ 5 s (CH
4
), ≤ 7 s (C
3
H
8
), *1 with wind protection: ≤ 9 s (CH
4
), ≤ 9 s (C
3
H
8
), *1
t
90
: ≤10 s (CH
4
), ≤12 s (C
3
H
8
), *1 with wind protection: ≤18 s (CH
4
), ≤21 s (C
3
H
8
), *1
Flow rate 0...6m/s:
Max. ±3% of detection range or ±10% of display (regarding to 0 m/s) *2, *4
Pressure 800...1100 hPa:
Max. ±3% of detection range or ±7% of display (regarding to 1000 hPa) *4
Humidity 5%...90% r.F.:
Max. ±5% of detection range or ±15% of display (regarding to 50% r.F. and 40°C) *4
Temperature -10...+40°C:
Max. ±5% of detection range or ±15% of display (regarding to 20°C) *4
Cross sensitivities
at 50%LEL:
Methane – Measuring range (#) *3 .
2,20 %Vol. CH
4
: = 100%
2,00 %Vol. H
2
: ca.115%
0,85 %Vol. C
3
H
8
: ca. 65%
Propane – Measuring range *3 .
0,85 %Vol. C
3
H
8
: = 100%
2,00 %Vol. H
2
: ca.188%
2,20 %Vol. CH
4
: ca.162%
Hydrogen – Measuring range
(#) *3
2,00 %Vol. H
2
: = 100%
2,20 %Vol. CH
4
: ca. 86%
0,85 %Vol. C
3
H
8
: ca. 53%
Special notes: When the sensor was exposed to a gas concentration which was considerably higher than 100%LEL, the zeropoint and
the sensitivity of the sensor have to be checked, once the gas concentration has disappeared.
Expected lifetime: 5 years
MK218-1 Catalytic combustion sensor for combustible gases and vapors (according to EN 61779-4)
Response time t
50
: ≤ 5 s (CH
4
), ≤ 6 s (C
3
H
8
), *1 mit Windschutz: ≤ 8 s (CH
4
), ≤12 s (C
3
H
8
), *1
t
90
: ≤ 9 s (CH
4
), ≤12 s (C
3
H
8
), *1 mit Windschutz: ≤18 s (CH
4
), ≤25 s (C
3
H
8
), *1
Flow rate 0...6m/s:
Max. ±3% of detection range or ±10% of display (regarding to 0 m/s) *2, *4
Pressure 800...1100 hPa:
Max. ±3% of detection range or ±7% of display (regarding to 1000 hPa) *4
Humidity 5%...90% r.F.:
Max. ±5% of detection range or ±15% of display (regarding to 50% r.F. and 40°C) *4
Temperature -10...+50°C:
Max. ±5% of detection range or ±15% of display (regarding to 20°C) *4
Cross sensitivities
at 50%LEL:
at 2 %Vol NH3:
Methane – Measuring range
(#) *3 .
2,20 %Vol. CH
4
: = 100%
2,00 %Vol. H
2
: ca.121%
1,15 %Vol. C
2
H
4
: ca. 82%
0,85 %Vol. C
3
H
8
: ca. 69%
1,10 %Vol. C
4
H
8
O
2
: ca. 64%
1,00 %Vol. C
3
H
8
O: ca. 63%
0,85 %Vol. C
4
H
10
O: ca. 62%
0,55 %Vol. C
7
H
8
: ca. 58%
1,25 %Vol. C
3
H
6
O: ca. 54%
0,50 %Vol. C
6
H
14
: ca. 52%
0,35 %Vol. C
9
H
20
: ca. 40%
2,00 %Vol. NH
3
: ca. 45%
Propane – Measuring range *3 .
0,85 %Vol. C
3
H
8
: = 100%
2,00 %Vol. H
2
: ca.195%
2,20 %Vol. CH
4
: ca.153%
1,15 %Vol. C
2
H
4
: ca.120%
1,10 %Vol. C
4
H
8
O
2
: ca. 91%
1,00 %Vol. C
3
H
8
O: ca. 90%
0,85 %Vol. C
4
H
10
O: ca. 89%
0,55 %Vol. C
7
H
8
: ca. 81%
1,25 %Vol. C
3
H
6
O: ca. 78%
0,50 %Vol. C
6
H
14
: ca. 73%
0,35 %Vol. C
9
H
20
: ca. 55%
2,00 %Vol. NH
3
: ca. 60%
Nonane – Measuring range
(#) *3 .
0,35 %Vol. C
9
H
20
: = 100%
2,00 %Vol. H
2
: ca.333%
2,20 %Vol. CH
4
: ca.265%
1,15 %Vol. C
2
H
4
: ca.223%
0,85 %Vol. C
3
H
8
: ca.182%
1,10 %Vol. C
4
H
8
O
2
: ca.172%
1,00 %Vol. C
3
H
8
O: ca.170%
0,85 %Vol. C
4
H
10
O: ca.167%
0,55 %Vol. C
7
H
8
: ca.152%
1,25 %Vol. C
3
H
6
O: ca.146%
0,50 %Vol. C
6
H
14
: ca.137%
2,00 %Vol. NH
3
: ca.113%
Special notes: When the sensor was exposed to a gas concentration which was considerably higher than 100%LEL, the zeropoint and
the sensitivity of the sensor have to be checked, once the gas concentration has disappeared.
This sensor is not suitable for detection of aceton. The sensor responds to aceton, but is only suitable for warning of this
gas. Permanent exposure to aceton may result in a considerable loss of sensitivity.
Expected lifetime: 5 years
*1 For other gases longer response times are valid, especially for nonane.
*2 At flow rates >3 m/s a wind protection is necessary. Generally it should be avoided that the
gas is supplied to the transmitter from below (sensor side).
*3 The cross sensitivities can vary depending on sensor and are dependent on gas concentration and
age of sensor. Other combustible gases which are not listed, are expected to cause an increase of
signal.
*4 This specification is valid for methane and propane.