| Measuring
Principle |
Electrochemical
Fuel Cell, Continuous Measurement |
| Measuring
Range |
0 to 1 000
ppm |
| Response
Time |
< 20 sec
with 110% input |
| Cross Sensitivity |
Methane :
None / Hydrogen: <30% / H2S, SO2 : <10% |
| Alarm Thresholds |
Factory preset
to two levels between 20 and 1 000 ppm. Standard settings are 100 and
400 ppm. |
| Alarm Level
Adjustment |
Factory preset
to ± 5% of required levels. |
| Alarm Indication
First Level |
Lamp and
green LED’s alternate between 2 seconds flashing and 2 seconds
steady light |
| Alarm Indication
Second Level |
Lamp and
green LED’s flash continuously |
| Latching
(optional) |
Red LED latches
on at second level and can only be reset by switching lamp Off and On
again, provided gas level is below second alarm level |
| Zero Drift
vs Temperature |
< 9 ppm
over 0 to 40°C |
| Span Drift
vs Temperature |
< 10%
over 0 to 40°C |
| Span Drift
vs Time |
<2 % signal
per month |
| Pressure
Co-efficient |
<0.02%
signal / mBar |
| Operating
Pressure Range |
80 to 150
kPa |
| Operating
Temperature |
0 to 50°C |
| Operating
Relative Humidity |
15 to 95%
continuous; 0 to 99 intermittent |
| Current Consumption |
<50mA |
| Measuring
Cell Life Expectancy |
>2 years
(in air at Standard Temperature and Pressure) |
| Intrinsic
Safety Approval |
Ex ib 1 T4 |
