Robust 4-20mA pressure transmitters designed to resist seawater corrosion. Ideal for ship sytems, desalination plants, subsea & coastal monitoring.
Pressure transmitters designed for seawater service incorporate specialized materials like Titanium, engineered ceramics, or alloys such as Hastelloy for all wetted components to combat the highly corrosive effects of saltwater. This focus on material science ensures long-term reliability and accurate 4-20mA signal output in demanding marine, offshore, and coastal applications, preventing premature failure due to pitting or crevice corrosion common with standard materials. These robust instruments are essential for reliable measurements in applications ranging from shipboard systems and desalination plants to subsea equipment and environmental monitoring.
Marine air lubrication system submersible seawater resistant air pressure transmitter - Measuring gauge air pressure inside a pipe near an underwater air injector for a ship's drag reduction system. Marine grade pressure sensors provide essential accuracy and seawater resistance for reliable component testing and performance tuning at depths down to 10 meters.
Reverse osmosis desalination plant seawater pressure sensor with 1,500 psig range and 4-20mA output - Ensure efficient operation and prevent membrane damage in your reverse osmosis desalination system with this reliable pressure sensor designed for harsh seawater environments.
DMK457 Marine Approved Pressure Transmitter
DMK 458 Seawater Low Range Pressure Transmitter
LMK 487 Submersible Ballast Tank and Draught Level Pressure Transmitter
- Marine fender air and seawater pressure sender and display - Monitor marine fender pressure with this IP68 marine bronze pressure sensor and high visibility display. Ideal for harsh seawater environments.
- 3 kg/cm2 sea water pressure transmitter
- 12 bar g sea water compatible 4-20mA pressure sensor for use on marine vessels
- 2 bar g sea water pressure transmitter for marine engine cooling system
- Seawater pressure transmitter with 10 bar range and marine certification
- Seawater and crude oil compatible 75 bar pressure transmitter for marine use
- Reverse osmosis desalination 100 psi g 4-20mA output seawater pressure sensor
- Seawater solution 60 inH2O hydrostatic pressure sensor for 190degF temperature
- Sea-water corrosion resistant 10 bar pressure transmitter
- Ferry hull draft monitoring 3 bar absolute 4-20mA output seawater pressure sensor
- 10mH2O absolute 4-20mA marine approved seawater pressure sensor for bilge water leak testing use
- 10 barg range 4-20mA output saltwater pressure sensor for sea water heat exchanger use
- 5 barg range 4-20mA output submersible seawater pressure sensor for measuring sea level
Find out more about Sea Water Resistant Pressure Transmitters to determine which product options and capabilities will best meet your application requirements.
Selecting pressure transmitters for applications involving seawater requires careful consideration of material compatibility due to the high salinity and inherent corrosivity of the medium. Standard industrial materials often succumb quickly to the aggressive nature of seawater, leading to premature sensor failure and unreliable measurements. Therefore, transmitters designed specifically for marine or coastal environments utilize specialized materials for all components exposed to seawater, commonly referred to as “wetted parts”. These typically include the sensing diaphragm, the process connection, and potentially the housing if the unit is submersible or frequently splashed.
The primary challenge stems from various forms of corrosion exacerbated by chlorides in seawater, including pitting, crevice corrosion, and galvanic corrosion, especially when dissimilar metals are present. Even materials like standard 316 stainless steel, often considered corrosion-resistant, can exhibit limited lifespans in warm or stagnant seawater conditions. To ensure long-term operational integrity and maintain the accuracy of the 4-20mA output signal, these transmitters often employ advanced materials. Robust options such as Titanium alloys offer exceptional resistance across a wide range of temperatures and salinity levels. Certain engineered ceramics, like high-purity Alumina (Al2O3), provide excellent chemical inertness, making them suitable for sensing diaphragms.
Special metal alloys like Hastelloy C276 or Monel 400 are frequently specified for their superior performance against pitting and crevice corrosion in chloride-rich environments. For specific components or lower-pressure applications, high-performance plastics such as PVDF (Polyvinylidene fluoride) or PEEK (Polyether ether ketone) might be used for their excellent chemical resistance, although mechanical strength and pressure ratings need careful evaluation. The choice of material often depends on the specific application parameters, including temperature, pressure range, flow conditions, and the potential presence of other chemicals or biological activity (biofouling), which can also influence corrosion rates.
These specialized transmitters find critical use in diverse marine and coastal applications. Examples include monitoring ballast tank levels on ships, measuring line pressure in seawater cooling systems for engines or industrial processes, instrumentation within desalination plants (particularly on intake and brine discharge lines), controlling systems in aquaculture facilities, monitoring pressure in subsea hydraulic control modules for offshore oil and gas platforms, deployment on oceanographic research buoys, and integration into coastal monitoring stations for tide and wave height measurement. The robust construction ensures dependable operation despite constant exposure to the harsh marine environment.