Explore underwater
sensing with 4H-JENA
Discover dissolved gas sensors, FerryBox systems and integrated underwater monitoring technology.
Specialists in dissolved gas monitoring and FerryBox systems for installation in vessels, designed to suit each individual application.
4H-JENA is renowned for a wide range of in-situ underwater sensor systems to detect hydrocarbons (e.g. methane), CO2, dissolved oxygen, Total Alkalinity, pH and fully integrated systems down to full ocean.
HydroC CO2 Sensor
The CONTROS HydroC® CO₂ sensor is a unique and versatile subsea / underwater carbon dioxide sensor for in-situ and online measurements of dissolved CO₂. The CONTROS HydroC® CO₂ is designed to be used on different platforms following…
HydroC CO2 FT flow through
Although not the most powerful greenhouse gas, CO2 drives climate change due to the enormous volumes of this gas pumped into the atmosphere. Studies on the behaviour, distribution and interaction of CO2 in surface waters depend on…
HydroFIA TA analyser for total alkalinity in seawater
The CONTROS HydroFIA TA is a flow-through system for the determination of the total alkalinity in seawater. It can be used for continuous monitoring during surface water sampling or for discrete samples. The HydroFIA can easily be…
HydroC PAH fluorometer for Polycyclic Aromatic Hydrocarbons
Already smallest amounts of oil in water have a negative affect on the marine environment and reduce the quality of fresh water in lakes and reservoirs. As oil in water contains significant amounts of PAH (polycyclic aromatic…
HydroC MEG Mono Ethylene Glycol Leak Detection
Mono Ethylene Glycol is one of the most important fluids in the modern Oil + Gas industry. Indeed, in many areas of the offshore, the monitoring of MEG has become a necessity. CONTROS’ HydroC™ – MEG is a unique underwater leakage…
Contros Mobile Leak Detection System
Hydrocarbons in seawater are a multiphase mix consisting of an oil phase, gas bubbles, dissolved gas in seawater, formation water, cold seawater and solid gas hydrate phase. In order to detect and localize any hydrocarbon emission at…
HydroC Battery Pack
There are three different sizes of battery housings available. Each housing can either be filled with rechargeable batteries or primary batteries. The housings are offered as light version deployable until 300 m water depth or as…
FerryBox
he -4H- FerryBox is an autonomous, low-maintenance measuring system, which is designed for the continuous operation onboard ships, on measurement platforms and at river banks.
Active/Passive Sampler
4H-Jenna offer sampling systems for different purposes: – Passive sampler – Active sampler – Litter sampler – Plankton sampler Passive sampler The -4H-Passive Sampler is a flow-through tube array, which can be equipped with different…
CONTROS HydroC CH₄ FT
The CONTROS HydroC CH₄ FT is a unique surface methane partial pressure sensor designed for flow through applications like pumped stationary systems (e.g. monitoring stations) or ship based underway systems (e.g. FerryBox). Fields of…
CONTROS HydroC® CH₄
The CONTROS HydroC® CH₄ sensor is a unique subsea / underwater methane sensor for in-situ and online measurements of CH₄ partial pressure (p CH₄). The versatile CONTROS HydroC® CH₄ provides the perfect solution for the monitoring of…
CONTROS HydroFIA pH
The CONTROS HydroFIA pH is a flow-through system for the determination of the pH value in saline solutions and ideally suited for measurements in seawater. The autonomous pH analyser can be used in the lab or easily integrated into…
CONTROS HydroFIA pH
The CONTROS HydroFIA pH is a flow-through system for the determination of the pH value in saline solutions and ideally suited for measurements in seawater. The autonomous pH analyser can be used in the lab or easily integrated into…