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Methane is one of the most important gases
in our environment. Indeed, in many areas of everyday life,
the monitoring of methane is a necessity. The CAPSUMS`s METS
is a unique underwater methane sensor solving the problems
of the in-situ measuraments of CH4. Applications range from
the treatment of sewage waters and landfill leachates to water
quality monitoring, from biogas production to climate change
studies and also includes many aspects of the offshore oil,
gas and hydrate exploration activities (e.g. installation
safety, environmental protection, exploration surveys).
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| Detector:
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type:
semi-conductor
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| Function
principle: |
The hydrocarbon molecules diffuse out of
the liquid through a special silicone membrane into the detector
room. The adsorption of hydrocarbon on the active layer leads
to electron exchange with oxygen and thus to modification
of the resistance, which the electronic transduces into a
voltage.
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| Membrane: |
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| Standard: |
10 µm
silicone membrane |
| Optional: |
10 to 100 µm silicone membrane with
antifouling protection
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| Operational
Ranges: |
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| Depth: |
0-2000
m optional to 3,500 metres
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| Temperature: |
typical
2-20 °C (other ranges on request)
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| Methane: |
typical 50 nmol/l-10 µmol/l (other
ranges on request)
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Power
Supply:
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generally
9 - 36 VDC |
Power
consumption:
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160
mA (switch-on peak 400 mA)
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| Output: |
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| Standard: |
analog
0 - 5 V and digital RS-485
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| Options: |
•
RS - 232 (sensor output)
• RS - 485/ RS - 232 (desktop converter)
• 0 - 5 V/ 4-20 mA (desktop converter)
(other outputs on request)
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| Specifications: |
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| Housing
diameter: |
49 mm
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| Length
overall: |
200
mm
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| Weight
in air approx: |
1,5
kg (titanium: 1,0 kg)
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| Housing
material: |
High-grade-steel
or titanium
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| Connector: |
MC BH
8M |
Development funded by the German
Federal Ministry of Research & Technology
(Grant # BEO 71/03F0171A)
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