|
METS - an underwater methane sensor
Function principle
A methane sensitive detector is located in a detector room in the sensor head.
The detector room is protected against water and pressure by a silicone membrane.
The gas molecules diffuse through the membrane, following the partial pressure gradient
between water and detector room, according to the Law of Henry. Hence, the concentration
in the detector room is directly correlated to the concentration in the outside water.
The correlation is expressed by the calibration formula.
Classic METS:
IR-METS:
W-METS:
K-METS:
Response time:
|
high sensitivity, for long-term monitoring or low-speed profiling
for high concentrations and anoxic environments
for work at over-saturation
for mobile deployment: profiling, ROVs, AUVs
reaction time within few seconds T90 between 1 and 30 min
depending on version and deployment conditions
|
METS classic,
IR, W
|
Size: diameter 49 mm; length over all approx. 200 mm
|
K-METS
|
Size: diameter 49 mm; length over all approx. 200 mm
|
No internal moving parts or pumps, hence lower failure risk and lower power drain.
| |
Standart |
Optional |
| Material (housing and connector) |
Stainless steel
|
Titanium |
| Weight in air METS (classic, IR, W) |
1.3 kg |
0.8 kg |
| Weight in air K-METS |
2.2 kg |
1.4 kg |
Connector (manufacturer: Subconn)
|
MCBH8M-SS |
MCBH8M-Ti |
| Depth |
2000m |
3500m |
Application example
|
Detection of methane hydrates at the sea-floor
Adaptation of METS sensors to a CTD logging system
View on the bottom
|
Further applications
Oil industry: offshore oil and gas exploration, survey and inspection, pipeline leak detection
Sewage treatment plants: basin aeration control
Waste water ducts: control of methane presenc
Download Datasheet Methan Mets.pdf
|
|
|
