Sonde optode d’oxygène dissous HydroFlash™ O2

La sonde Contros HydroFlash™ O2 est un capteur d’oxygène versatile dans les eaux peu profondes comme en océan profond, elle est utilisable en déploiement autonome comme intégré dans des ensembles de capteurs.

HydroFlash™ O2 est le choix parfait pour une variété de schémas de déploiement et de plateformes parmi AUV, ROV, gliders, bouées, rosettes et mouillages, etc.

Comment fonctionne-t-elle?

Cette sonde avancée est basée sur le principe de l’extinction de fluorescence. Les molécules d’oxygène dissous (O2) diffusent à l’intérieur d’un élément sensible abritant un colorant fluorescent. L’oxygène peut éteindre cette fluorescence en transférant l’énergie d’excitation depuis le colorant vers la molécule O2. Plus l’oxygène est présent dans l’eau plus faible est le signal de fluorescence mesuré.

Avantages
 Colorant à haute fluorescence est intégré dans un substrat solide courbe pour améliorer le rendement lumineux
 Temps de réponse court (T63<3s) combiné avec haute stabilité et précision
 Boîtier titane compact
 Robustesse, utilisable jusqu’à 6 000 mètres en immersion
 Très faible consommation d’énergie
 Versatile, facilement intégré dans tout ensemble ou plateforme en océanographie
 Mode veille programmable pour des déploiements étendus en mode autonome
 Logiciel complet pour programmation, transfert de données et visualisation
 Mesure sans consommation d’oxygène

HydroC™ CH4 Sensors

CONTROS' HydroC™ CH4 sensor is an unique underwater hydrocarbon and methane sensor for in-situ and online measurements of dissolved CH4. Central to the CONTROS monitoring concept for subsea oil and gas production is the HydroC™ CH4, which was specifically developed to allow fast, real-time and in-situ detection of gaseous and even dissolved hydrocarbons/methane in the water column. The HydroC™ CH4 has been successfully implemented in leak detection surveys and pipeline inspections to water depths up to 10,000 Ft. and responds to all hydrocarbons including natural gas and crude oil.

Dissolved CH4 molecules diffuse through a patented thin-film composite membrane into the detector chamber, where their volume is determined by means of IR absorption spectrometry. Concentration-dependent IR light intensities are converted into output signals.

Advantages

• High accuracy within 3 %
• Very robust, can be used in water depths up to 6,000 meters
• User-friendly
• Versatile; easy integration with almost  every oceanographic measurement system  and platform
• Stable for long-term measurement
• ‘ Plug & Play’ principle; all required cables, connectors and software are included

HydroC™ CH4 Flow Through

HydroC™ CH4 FT Methane Flow Through Sensor is a unique hydrocarbon and methane sensor for in-situ and online measurements of dissolved CH4.

Water is pumped through the membrane head of the Flow Through Sensor. Dissolved CH4 molecules diffuse through a silicone membrane into the patented detector chamber, where their number is determined by means of IR absorption spectrometry. Concentration-dependent IR light intensities are converted into output signals.

Advantages

• The advantages of the CONTROS HydroC™ sensor line is the stability in long term monitoring (12 months+)
• Track proven record in the oil & gas field as well as in the scientific research
• Unaffected performance from turbidity and zero interferences to other gaseous substances in the environment (lowers false alarm rate)
• Easy integration to the required system, integration pigtail is included
• Long-term stable signal, high realiability, very high accuracy and a long maintenance interval
• High realiability and reproducibility of the data
• Plug n' Play principle, all required cables, connectors and software are included and a proven ROV and AUV compatibility

The HydroC™ CO2 sensor is an unique underwater carbon dioxide sensor for in-situ and online measurements of dissolved CO2. The HydroC™ CO2 sensor is perfect for profiling, AUVs and rosettes or for long-term deployment on buoys and moorings.

Dissolved CO2 molecules diffuse through a patented thin-film composite membrane into the detector chamber, where their volume is determined by means of IR absorption spectrometry. Concentration-dependent IR light intensities are converted into output signals.

Advantages

• High accuracy within 1 %
• Very robust, can be used in water depths up to 6,000 meters
• Fast response time, first signal derived in under 7 seconds
• User-friendly
• Versatile; easy integration with almost every oceanographic measurement system and platform
• Stable for long-term measurement
• ‘Plug & Play’ principle; all required cables, connectors and software are included

The HydroC™ CO2FT sensor is an unique carbon dioxide sensor for in-situ and online measurements of dissolved CO2.

Water is pumped through the membrane head of the flow-through sensor. Dissolved CO2 molecules diffuse through a silicone membrane into the patented detector chamber, where their volume is determined by means of IR absorption spectrometry. Concentration-dependent IR light intensities are converted into output signals.

Advantages

• The advantages of the CONTROS HydroC™ sensor line is the stability in long term monitoring (12 months+)
• Track proven record in the oil & gas field as well as in the scientific research
• Unaffected performance from turbidity and zero interferences to other gaseous substances in the environment (lowers false alarm rate)
• Easy integration to the required system, integration pigtail is included
• Long-term stable signal, high realiability, very high accuracy and a long maintenance interval
• High realiability and reproducibility of the data
• Plug n' Play principle, all required cables, connectors and software are included and a proven ROV and AUV compatibility

Central to the CONTROS monitoring concept for subsea oil and gas production is the HydroC™ CH4, which was specifically developed to allow fast, real-time and in-situ detection of gaseous and even dissolved hydrocarbons/methane in the water column. The HydroC™ CH4 has been successfully implemented in leak detection surveys and pipeline inspections to water depths up to 10,000 Ft. and responds to all hydrocarbons including natural gas and crude oil. In order to achieve the best, and individualized monitoring solutions, CONTROS offers consulting and engineering services.

Dissolved CH4 molecules diffuse through a silicone membrane into the patented detector chamber. Based on state-of-the-art Laser Spectrometry, the laser gas-detection modules have virtually no cross-sensitivity with other gases and feature an innovative, patented measurement principle that eliminates the need for a reference channel. Concentration dependent IR light intensities are converted into output signals.

Advantages

• The advantages of the CONTROS HydroC™ sensor line is the stability in long term monitoring (12 months+)
• Track proven record in the oil & gas field as well as in the scientific research
• Unaffected performance from turbidity and zero interferences to other gaseous substances in the environment (lowers false alarm rate)
• Easy integration to the required system, integration pigtail is included
• Long-term stable signal, high realiability, very high accuracy and a long maintenance interval
• High realiability and reproducibility of the data
• Plug n' Play principle, all required cables, connectors and software are included and a proven ROV and AUV compatibility

HydroC™ Mobile Early Leak Detection System is the combination of three different measuring instruments that allows for the trustable detection, identification and characterization of oil and gas related pollution in water and guarantees a low false alarm rate.

The MELDS consists of:

• A polycyclic aromatic hydrocarbon (PAH) sensor based on the principle of fluorescence for the detection of any oil in water in real time,
• A methane (CH4) sensor unambiguously detecting gaseous and dissolved CH4 as well as other hydrocarbons in water,
• A conductivity, temperature and pressure (CTD) probe for the measurement and identification of anomalies in the environmental baseline.

Detection and localization of leaks (where?)

• Quick sensors detecting smallest possible leaks
• HydroC™ CH4 sensor as backbone of MELDS system
• Combination of direct and indirect methods

Qualification of leaks (what?)

• Selective method to eliminate false alarms
• Direct methods for direct detection of leaking medium
• Direct methods only

Advantages

Diverse

• Sensor system of CTD, PAH, CG and CH4 sensor to use synergies
• Detects oil in water, combustible gases, environmental anomalies
• Long term change conclusions possible due to compare environmental conditions

Sensitive

• Detects early leaks (invisible leaks)
• Very low detection limit

Definite

• Qualification of leaks due to narrow band within IR sensor for CH4 detection

Robust

• Proven Arctic version available (for water temperatures below zero degrees )
• Particle filter for protection
• No damage for sensor caused by higher gas concentrations (gas bubbles), or oil in water

Easy to use

• Preconfigured intelligent software suite
• Simple tests to confirm functionality
• No warm up time on deck needed
• No “dry out” time after dive needed

Assistants

• Data post processing and reporting contracts possible
• 24h emergency contract possible

Sonde HAP (hydrocarbures polycycliques aromatiques) HydroC™

La sonde Contros HydroC™ est un fluorimètre submersible unique pour des mesures in-situ et en ligne des hydrocarbures polycycliques aromatiques (HAP).

Comment fonctionne-t-elle?

Une source de lumière génère de courts flashs lumineux dans le milieu. Une partie de la lumière de fluorescence induite à l’intérieur du cône d’émission revient vers la sonde. Un filtre passe bande réduite la largeur du spectre de cette lumière de fluorescence en fonction des exigences de la surveillance recherchée. La lumière incidente est focalisée sur la photodiode silicium UV qui crée le signal électronique proportionnel, lui-même amplifié et converti en un signal exploitable.

HydroC™ Subsea Fluorometer for Polycyclic Aromatic Hydrocarbons (PAH)

is designed as compact and light underwater unit to detect PAH on the water surface as well as down to 500 meter or deeper water to  depth. The fluorometer allow continuous measurements and non-destructive sampling in combination with good specificity and low detection limits.

An excitation light source generates short flashes. A small part of the emitted fluorescence light coming from the illuminated cone. A band pass filter reduced the spectral range of the fluorescent light according to the special demands of the monitoring task. The incident light is focused onto the silicon UV photodiode which is measured electronically and converted into a voltage signal.

Facts

Application

In-situ measurement of dissolved humic acids, amino acids, BTXE and polycyclic aromatic hydrocarbons PAH motivated by:

• Supervision and online control of fresh water in waterworks and boreholes
• Monitoring of waste water in industrial and municipal sewage works
• Crude oil detection, leakage control at offshore oil pipelines with ROV
• Fuel detection in natural waters and sewage plants

There are three different sizes of battery housings available. Each housing can either be equipped with packages of alkaline or rechargeable batteries. The housings are offered as a light version deployable up to 250 m or as heavy version deployable up to 6,000 m water depth.

Advantages

• Full titanium housing; excellent corrosion resistance
• User friendly through usage of battery packages

CONTROS offers all kind of cables in differnet lenghts and customized cable configurations.

CONTROS offers all kind of mountings customized for your special application.

FerryBox is an autonomous, low maintenance metrology system which has been developed especially for permanent deployment on ships, metrology platforms and river measurement points for long -term in situ monitoring of rivers, estuaries, coastal zones and open sea.

Due to its special architecture, the system is able to link a multitude of sensors and automatic analysis devices and even perform measurements in difficult media (such as sea water or bubbling water etc.). The modular flow-through system combines high flexibility in the choice of sensor types and methods with a fully integrated anti-fouling concept and the possibility for automatic and remote controlled operation based on the "LabView" software technology.

Advantages

• Requires little space because of the compact form
• Easy to maintain because of the open design and the anti-fouling concept
• Flexible because of the by-passes and the use of standard components
• Pressure resistant
• This type of system can be used below the waterline
• Remote control is possible

Facts