Device with marine approval certification for use on ships, and protected from liquid ingress when completely immersed in a fluid, to measure liquid level and convert it to an electrical signal to send to other instrumentation.
Products
- LMK458 Marine Approved Hydrostatic Level Transmitter - Marine approved level transmitter with 4-20mA output for measuring level of contents inside ship ballast, fuel, liquid cargo or wastewater tanks
- LMK 487 Submersible Ballast Tank and Draught Level Pressure Transmitter - A 22mm diameter titanium body seawater depth and level probe with a 4-20mA output with Lloyds and DNV-GL ship approval, for monitoring the quantity of ballast or the draft of a ship’s hull.
Applications
- Floating dry dock ballast tank 14ft range 4-20mA output submersible seawater level sensor - A seawater compatible liquid level sensor for submerging in a floating dry dock ballast tank and measuring the depth over a range of 0 to 14ft from the nose cone, and sending the corresponding 4-20mA signal through the submersible cable electrical connection.
- Desalination plant seawater feed tanks 5m range 4-20mA output submersible level sensor - A marine approved submersible seawater level sensor for submerging in desalination plant water tanks and measuring the depth over a range of 0 to 5m from the nose cone, and sending the corresponding 4-20mA signal through the submersible cable electrical connection.
- 9m 4-20mA ship fish storage seawater storage tank submersible level sensor
- 5 barg range 4-20mA output submersible seawater pressure sensor for measuring sea level
- 6m deep ballast tank level transmitter with marine certificate
- 100 meter IP68 sea water level transmitter with Marine & ATEX approval
- DNV / GL marine certified submersible seawater level transmitter for 0-3 metre depth
- 20 foot deep submersible salt water level transmitter for marine use
- Hydrophone array submersible 200 meter seawater depth sensor
- Rangeable fuel and freshwater submersible level sensor for ship tanks up to 1.6m high
Related Product and Application Guides
- Hydrostatic Pressure
- Submersible
- Hydrostatic Liquid Level Sensors
- Liquid Level Sensors
- Marine Approval
Related Help Guides
- Using a screw-in or waterproof pressure transmitter to measure liquid level
- Improve the electrical termination of vented submersible pressure sensors
- Choosing PVC, PUR, FEP and TPE cable types
- How to reduce submersible pressure sensor failures caused by moisture ingress
- Using absolute pressure sensors to measure hydrostatic level
- Considerations for monitoring Landfill Water Level
- Why are Submersible applications so demanding of Pressure Transducers?
- Determining the Signal Cable Length of a Suspended Liquid Level Transducer
All voyage and safety critical equipment on a ship must be certified by the same marine approval body that audited and registered the whole ship.
A marine approved device is one that has been tested and certified by a recognised body such as LR (Lloyd’s Register), GL (Germanischer Lloyd), DNV (Det Norske Veritas), ABS (American Bureau of Shipping) and CCS (China Classification Society) for use on a ship.
The marine approval process involves an initial and continuous periodic product assessment to inspect random production samples, ensure adequate production and inspection processes, procedures, documentation and quality control, and review the current product design and any future design iterations for compliance with the type approval.
A submersible device can be installed in liquid without causing any damage as long as the installation instructions are adhered to, and the specified depth and time duration limits for submersion are not exceeded.
Assembled devices are vulnerable to liquid ingress, which can enter the device through seals and joints or permeate through components that incorporate thin membranes or porous materials.
To achieve a long lasting submersible construction, the device is constructed from materials which will not easily corrode when exposed to a fluid. Corrosion may cause the material to fail and allow liquid to enter the device, or interfere with the seal joining the corroded material to another component.
The seals used to join device components together are pressure leak tight, resilient to the expected temperature variations and resist corrosion from the surrounding fluid.
All components and seals are designed to withstand the pressure expected at the maximum required liquid depth, and this may involve a series of seals and backfilling with a potting compound or other fill material to improve longevity and reliability at greater depths.
A liquid level sensor is an instrument for measuring the height of a liquid and converting it to an electrical signal which is sent to other instrumentation to display, monitor, log or control the liquid level. The probe is lowered into the tank and immerse in the liquid. A typical sensor technology employed is a pressure sensor which will measure the pressure generated by gravity acting on the surrounding liquid.