This submersible sensor & instrument selection guide will help you discover the most appropriate product for installations where the instrumentation will be completely submerged in water or other type of liquid.
In addition you will find information to help you with the terminology and specification parameters used to define IP68 rated submersible measurement instrumentation.
Contents
Products
Measurement instrumentation for permanent immersion in boreholes, reservoirs, rivers, coastal waters, ocean and liquid storage tanks.
Underwater Pressure Sensors- Pressure sensors for installing underwater which are constructed to prevent water entering sensitive components and causing damage to the sensor.
Waterproof Absolute Pressure Sensors- Waterproof absolute pressure sensors with absolute reference ranges for monitoring underwater pipe pressures or water depth/level in applications where it is not possible or less practical to provide a vented reference for atmospheric pressure compensation.
Submersible Diesel Tank Level Sensors- Diesel fuel oil storage tank device for measuring liquid level and converting it to an electrical signal to send to other instrumentation protected from diesel ingress when completely immersed in the fuel oil.
Submersible Leachate Level Transmitters- Sensing transmitter devices protected from liquid ingress when completely immersed in a leachate for measuring leachate level and converting it to a 4-20mA current output signal to send to other instrumentation.
Landfill Site Submersible Leachate Level Transmitters- Sensing transmitter devices protected from liquid ingress when completely immersed in a leachate for measuring leachate level and converting it to a 4-20mA current output signal to send to other instrumentation on a landfill site used to bury waste material.
Submersible Liquid Level Sensors- Devices protected from liquid ingress when completely immersed in a fluid for measuring liquid level and converting it to an electrical signal to send to other instrumentation.
Marine Approved Submersible Liquid Level Sensors- Marine approval certification for use on ships. Protected from liquid ingress when completely immersed in a fluid. Device for measuring liquid level and converting it to an electrical signal to send to other instrumentation.
Submersible Hydrostatic Level Sensors & Probes- Level sensors for submerging permanently in liquid to determine the level or depth of fluid by measuring the hydrostatic pressure.
Plastic Submersible 4-20mA Liquid Level Sensors- Plastic based chemical resistant casing material, protected from liquid immersion, 4 to 20 mA current output signal liquid level sensor.
IP68 Submersible Protected Voltage Output Signal Pressure Transducers- Voltage signal out pressure transducers protected to IP 68 ingress protection rating for immersing in water or other compatible liquids.- Submersible Pressure Transmitters- Select a 4-20mA current loop output sensor for submerging underwater to measure liquid level, water depth or pressure of submerged equipment.
- Sea, Brackish or Salt Water Submersible IP68 Depth & Level Sensors- IP68 rated transmitters and transducers suitable for use with tidal and coastal salt water.
Water Resistant Pressure Sensors with Strain Gauge Output- Water resistant strain gauge output pressure sensor for measuring hydrostatic liquid level or underwater system pressures.
Freshwater
Fresh water sensors & instruments for submersible use in environmental monitoring, water utilities, boreholes, reservoirs and other applications involving the submersion into to clean potable drinking water.
- IMSL IP68 Stainless Steel 316L Hydrostatic Pressure Sensor
LMP305 Borehole Level Transmitter- IWSL Potable Water Submersible Level Sensor
- IMSTL IP68 Water Temperature and Depth Transmitter
LMP307 Submersible Level Transmitter
LMP 308 Removable Waterproof Cable Connection Water Level Sensor- S12S SDI-12 Coms IP68 Pressure and Temperature Sensor
Wastewater
Wastewater submersible sensors & instruments for installing in sewage treatment systems, landfill sites and other industrial waste management sites.
LMK809 Plastic Submersible Low Level Transmitter- LMK807 Plastic Submersible Level Transmitter
LMK 806 Plastic 21mm diameter Submersible Level Probe- LMK382 Low Range IP68 Waste Water Level Transmitter
LMK387 Cleanable Sewage and Sludge Pressure/Level Sensor- LMK307 Submersible Waste Water Level Sensor
Seawater
Water tight sensors & instruments made from materials that have a high corrosion resistance to sea water.
- LMK458 Marine Approved Hydrostatic Level Transmitter
MTM3000 10mm diameter submersible miniature pressure transducer
DMK457 Marine Approved Pressure Transmitter
LMK 487 Submersible Ballast Tank and Draught Level Pressure Transmitter- LMK 806 Plastic 21mm diameter Submersible Level Probe
ATM/N Titanium Submersible Hydrostatic Pressure Transmitter- IMCTL Submersible Liquid Level and Temperature Transmitter
SWL Marine Bronze Submersible Level Sensor- S12C SDI-12 Seawater Pressure & Temperature Transducer
Chemical Resistant
Chemical resistant submersible sensors & instruments for use with caustic chemicals such as acid & alkaline solutions.
- LMK809 Plastic Submersible Low Level Transmitter
- LMK807 Plastic Submersible Level Transmitter
- LMK 806 Plastic 21mm diameter Submersible Level Probe
Shallow Depth
Low range level measurement probes & instruments for measuring depth of rivers, stream and liquid level in small storage tanks.
- LMK458 Marine Approved Hydrostatic Level Transmitter
- LMP307 Submersible Level Transmitter
- LMK809 Plastic Submersible Low Level Transmitter
- LMP 308 Removable Waterproof Cable Connection Water Level Sensor
- LMK382 Low Range IP68 Waste Water Level Transmitter
- S12S SDI-12 Coms IP68 Pressure and Temperature Sensor
High Temperature
High temperature protected submersible probes and instrumentation with electronics, housing and cable designed to be immersed in hot liquids.
- LMK458 Marine Approved Hydrostatic Level Transmitter
- LMK382 Low Range IP68 Waste Water Level Transmitter
Intrinsically Safe
Intrinsically safe approved IP68/NEMA 6X sensors for immersing in tanks on sites where instrumentation must be certified for use in hazardous areas contain volatile substances such as oil refineries, fuel depots, landfill sites and sewage treatment works.
- LMK458 Marine Approved Hydrostatic Level Transmitter
- LMP307 Submersible Level Transmitter
- LMK 487 Submersible Ballast Tank and Draught Level Pressure Transmitter
- LMP 308 Removable Waterproof Cable Connection Water Level Sensor
DMP457 Marine Approved Pressure Transmitter- LMK382 Low Range IP68 Waste Water Level Transmitter
- LMK307 Submersible Waste Water Level Sensor
Marine Approved
Marine approved & certified sensors & instruments for submerging in marine vessel liquid storage tanks.
- LMK458 Marine Approved Hydrostatic Level Transmitter
- DMK457 Marine Approved Pressure Transmitter
- LMK 487 Submersible Ballast Tank and Draught Level Pressure Transmitter
- DMP457 Marine Approved Pressure Transmitter
Small Diameter
Small diameter submersible probes for use in narrow boreholes for applications such as hydro-logical site surveys & groundwater testing.
- LMP305 Borehole Level Transmitter
- MTM3000 10mm diameter submersible miniature pressure transducer
- LMK 806 Plastic 21mm diameter Submersible Level Probe
LMK306 Ground Water Level Transmitter
OEM Design
Customisable low cost submersible probes for OEM design applications.
- IMSL IP68 Stainless Steel 316L Hydrostatic Pressure Sensor
- IMCL Low Cost Submersible Pressure Sensor
- IWSL Potable Water Submersible Level Sensor
- IMSTL IP68 Water Temperature and Depth Transmitter
- 18.605 G Low Cost Submersible Diesel Fuel and Water Tank Level Sensor
IMTG Low Cost OEM Submersible Tank Gauging Level Sensor- IMCTL Submersible Liquid Level and Temperature Transmitter
- SWL Marine Bronze Submersible Level Sensor
Temperature Measurement
Temperature measurement submersible probes for measuring liquid temperature.
- LMK458 Marine Approved Hydrostatic Level Transmitter
- IMSTL IP68 Water Temperature and Depth Transmitter
- LMP307 Submersible Level Transmitter
- LMK382 Low Range IP68 Waste Water Level Transmitter
- IMCTL Submersible Liquid Level and Temperature Transmitter
- S12C SDI-12 Seawater Pressure & Temperature Transducer
- S12S SDI-12 Coms IP68 Pressure and Temperature Sensor
Application Description
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.
Help Guides
Articles with more information on using and selecting submersible measurement instrumentation.
- Hydrostatic Liquid Level Sensors
- IP Ratings
- Considerations for monitoring Landfill Water Level
- Using Hydrostatic Pressure Transducers for Measuring Fluid Level
- Why are Submersible applications so demanding of Pressure Transducers?
- How to reduce submersible pressure sensor failures caused by moisture ingress
- Using a screw in or waterproof pressure transmitter to measure liquid level
- Using absolute pressure sensors to measure hydrostatic level
- Determining the Signal Cable Length of a Suspended Liquid Level Transducer
- Improve the electrical termination of vented submersible pressure sensors
- Are all IP68 Water Resistant Protection Ratings the same
- Problem with zero drift when installing submersible pressure sensor