AquaMethane
For Underwater Leak Detection Surveys
AquaMethane is an underwater methane sensor designed to measure dissolved methane (CH₄) directly in water. Using Tunable Diode Laser Absorption Spectroscopy (TDLAS), it measures methane partial pressure in situ without collecting water samples for laboratory analysis.
Dissolved methane diffuses through a thin-film composite membrane into an internal gas circuit, where laser absorption is used to determine methane partial pressure. This enables continuous, high-resolution dissolved methane measurements for identifying potential methane anomalies around underwater infrastructure, including pipeline corridors.
In-situ measurement of dissolved methane in water
TDLAS technology for selective methane detection
Methane partial pressure measurement output
High-resolution measurements for underwater methane leak detection
High-Sensitivity Methane Detection Underwater
AquaMethane combines membrane-based gas diffusion with laser-based methane measurement to detect dissolved methane directly in the water column. It supports methane monitoring in underwater environments without requiring water samples to be brought to a laboratory.
In-Situ Methane Measurement
Measures dissolved methane directly underwater, without collecting water samples for laboratory analysis.
Membrane-Based Gas Diffusion
Dissolved methane passes through a thin-film composite membrane into the sensor’s internal gas circuit, where it is measured.
Continuous Underwater Methane Measurement
Supports continuous in-situ measurements for identifying methane anomalies in underwater environments.
TDLAS Measurement Technology
Uses Tunable Diode Laser Absorption Spectroscopy to determine methane partial pressure based on the absorption of laser light at methane’s characteristic wavelength.
Methane Partial Pressure Output
Reports methane partial pressure rather than directly measuring methane mass or molar concentration per litre of water. Dissolved concentration can be calculated separately when the necessary environmental parameters are available.
Underwater Infrastructure Monitoring
Can be deployed as part of an underwater inspection setup to investigate potential methane emissions along pipeline corridors. The sensor is used with an inspection ROV in the described SensorX survey configuration.
Technical Specifications
Key Specifications of AquaMethane
Specification
Details
Product Type
Targeted Gases
Measurement Medium
Measurement Method
Sensing Technology
Measurement Principle
Measured Quantity
Output Unit
Dissolved Methane Concentration
Typical Application
Underwater methane sensor
Methane (CH₄)
Water
In-situ dissolved methane measurement
Tunable Diode Laser Absorption Spectroscopy (TDLAS)
Membrane-based gas diffusion followed by laser absorption measurement
Methane partial pressure (pCH₄)
µatm (micro-atmospheres)
Can be calculated using methane partial pressure and relevant environmental parameters
Underwater methane detection and monitoring
