Hydrostatic Level Sensors

Hydrostatic pressure sensing devices for measuring liquid level and converting it to an electrical signal to send to other instrumentation.

Hydrostatic level sensors for measuring the pressure generated by a static head of liquid. Use hydrostatic level sensors to measure fluid level in storage tanks, processing vessels, header tanks, pump inlet head and other applications where hydrostatic pressure is used to determine liquid height.

• Monitoring flood levels in underground electrical substations with submersible probes - The LMK 382 provides reliable depth monitoring in underground electrical substations, featuring intrinsic safety and integrated Pt100 temperature sensing for harsh flood environments.
• Monitoring groundwater level in jet fuel contaminated wells using SDI-12 hydrostatic sensor - Monitor fluid levels in underground wells containing water and Jetfuel A1 mixtures using SDI-12 protocol hydrostatic level sensors

• LMK387 Cleanable Sewage and Sludge Pressure/Level Sensor
• LMP307 Submersible Level Transmitter
• LMK458 Marine Approved Hydrostatic Level Transmitter
• 18.605 G Low Cost Submersible Diesel Fuel and Water Tank Level Sensor

• High-accuracy sea level monitoring for high-salinity marine environments - Robust hydrostatic solution for sea level monitoring in high-salinity environments using marine bronze and ceramic sensing technology r with high-frequency data sampling.
• Tidal level measurement with SDI-12 interface seawater level sensor - Marine bronze submersible sensor for accurate tidal level measurement with SDI-12 for seamless integration with existing data acquisition and transceiver systems in coastal environment
• Ferric aluminium sulphate level sensor for monitoring coagulant tank in water treatment - Overcome corrosion and clogging when measuring ferric aluminium sulphate levels in water treatment plants using a flush-mounted ceramic transmitter.
• Electrophoretic painting tank level monitoring using flush ceramic transmitters - Using high-purity alumina diaphragms and PVDF connectors to provide reliable level monitoring in aggressive chemical environments found in car paint plants.
• Contaminated groundwater submersible plastic body 5 psi pressure transducer & display - This submersible pressure transducer and display can be used by landfill site pump techs to read leachate water level above the transducer at the well head.
• Dirty water, sludge & sewerage tank level 400 mbar pressure sensor - Flush ceramic diaphragm pressure sensor for measuring level of a dirty water, sludge & sewerage tank.

• LMK809 Plastic Submersible Low Level Transmitter
• DCL 531 Modbus RTU RS 485 Submersible Stainless Steel Liquid Level Sensor
• 36XW Digital Submersible Hydrostatic Level Sensor
• LMK351 High Overpressure Flush Level Transmitter

• Underground rain water storage tank level sensor and readout for 2 metre depth - Water level indicator for a 2 metre deep rain water storage tank located underground.
• 200m deep well pump water level sensor, switch & display - Protect your deep well pump with thhis submersible level transmitter and wall mounted indicator and alarm. This system provides reliable water level monitoring and pump protection at depths of up to 200 meters.
• High temperature ethanol boiler level measurement - Looking for a precise level sensor for boiling ethanol? Discover how a capacitive ceramic transmitter with EPDM seals provides millimeter accuracy for low-pressure boiler applications.
• Ammonium nitrate level sensing in agitated tanks at high temperature - Measure the liquid level of hot, concentrated ammonium nitrate using a flush ceramic sensor designed to withstand agitation and prevent crystallization issues.
• Viscous machine tool coolant level measurement with flush diaphragm sensor - Using a flush ceramic diaphragm to prevent clogging in viscous machine tool coolant tanks, ensuring reliable level measurement for oil and water emulsions containing swarf.
• Viscous soap and detergent storage hydrostatic level measurement - Flush-mounted ceramic transducer for monitoring tank levels in viscous soap and 50% sodium hydroxide applications.

• LMK331 Screw-In Ceramic Level Transmitter
• DPT200 Pressurised Tank Level Differential Pressure Transmitter
• LMK382 Low Range IP68 Waste Water Level Transmitter
• DS200 Combined Hydrostatic Level Switch, Gauge and Sensor

• Geothermal weir box flow measurement using low range capacitive level sensor
• Immersible water level sensor for 4 metre deep cold water storage tank
• Submersible rainwater tank level sensor for measuring 3.5m depth
• HART flameproof (Ex d) re-scalable level transmitter for hydrostatic head up to 2 metres
• Dockside sea water tide level transmitter up to 6 metres depth
• Low cost 2 metre high diesel tank level sensor with 0-10 volt output
• Sulfuric acid 12-15% conc. drop-in level probe for 10m high tank
• Submersible oil pressure sensor alternative to Ashdown CNS
• 1-5Vdc output, 2.5m range, salt water ballast tank level sensor
• Ferric Chloride solution hydrostatic level transmitter
• Hydropower reservoir submersible hydrostatic level transmitter & indicator
• Raw leachate feed tank depth probe

• Chemical Resistant Hydrostatic Liquid Level & Pressure Sensors - Find durable hydrostatic liquid level and pressure sensors designed for harsh chemical environments. Ideal for storage tanks and process applications requiring high corrosion resistance.
• 4-20mA Output Hydrostatic Level Transmitters & Sensors - Explore industrial 4-20mA hydrostatic level transmitters for reliable liquid depth measurement. Ideal for tank gauging, borehole control & process monitoring applications.
• Hazardous Area Submersible Hydrostatic Liquid Level Sensors - Explore our range of intrinsically safe (IS) submersible hydrostatic level sensors, designed for accurate liquid level measurement in hazardous environments
• 0-10 Volts Output Hydrostatic Sensors, Probes & Transducers - Choose 0-10V output hydrostatic sensors, probes & transducers for accurate liquid level and head pressure measurement. Ideal for industrial tanks, boreholes & process control systems.
• Submersible Hydrostatic Level Sensors & Probes - Explore submersible hydrostatic level sensors for continuous liquid level measurement. IP68 rated probes for tanks, boreholes, rivers & chemical compatibility.
• SDI-12 Hydrostatic Liquid Level Sensors - SDI-12 hydrostatic liquid level sensors for remote environmental monitoring. Low power, digital output, ideal for battery-powered data loggers in hydrology & water resource management.
• Combined Temperature and Hydrostatic Liquid Level Sensors - These sensors provide simultaneous measurement of both hydrostatic pressure and temperature, enabling precise level determination even when liquid density varies due to temperature fluctuations.
• Small Diameter Borehole Hydrostatic Liquid Level Sensors - These specialized sensors are designed for precise groundwater level measurements in narrow boreholes commonly used in geotechnical investigations and environmental monitoring.
• Marine Approved Hydrostatic Liquid Level Sensors - Marine approved hydrostatic liquid level sensors provide accurate and reliable level measurement of seawater ballast, diesel fuel, wastewater, and liquid cargo in harsh marine environments.
• Freshwater Hydrostatic Liquid Level Sensors - Liquid level sensors for measuring the level of freshwater in tanks, boreholes, reservoirs, rivers, canals, streams and wells.
• Plastic Submersible Hydrostatic Liquid Level Sensors - Explore our selection of corrosion-resistant submersible hydrostatic level sensors specifically designed for challenging chemical applications
• Plastic Externally Fitted Hydrostatic Liquid Level Sensors - Plastic externally fitted hydrostatic level sensors with ceramic diaphragms offer a reliable and cost-effective solution for measuring liquid levels in chemical storage tanks.
• Absolute Unvented Reference Hydrostatic Liquid Level Sensors - Absolute unvented reference hydrostatic level sensors provide reliable liquid level measurement in challenging environments where traditional vented sensors are impractical.
• Seawater Hydrostatic Liquid Level Sensors - Submersible hydrostatic level sensors designed for long-term immersion in seawater, engineered with corrosion-resistant materials to withstand harsh coastal and offshore environments.
• Brackish Water Hydrostatic Liquid Level Sensors - Brackish water hydrostatic level sensors are specifically designed for continuous submersion in coastal and estuarine environments where fresh and saltwater mix
• Hazardous Area Externally Fitted Hydrostatic Liquid Level Sensors - Ensure safe and accurate liquid level measurement in hazardous environments with our selection of externally mounted hydrostatic level sensors.
• Water Resistant Pressure Sensors with Strain Gauge Output - Explore our range of submersible pressure sensors engineered with strain gauge technology. These sensors excel in demanding underwater environments, offering accurate hydrostatic level measurements and reliable pressure readings for submerged systems.

Find out more about Hydrostatic Level Sensors to determine which product options and capabilities will best meet your application requirements.

Description

Hydrostatic level sensors are pressure sensing devices specifically designed for use on liquid level measurement applications.

All liquids which are under the influence of gravity generate a hydrostatic pressure. This pressure is similar to the weight of a solid object, but because of the fluid state it is possible to measure how the weight of the liquid varies with height.

The resulting pressure at different heights is directly proportional to the weight of a liquid between the surface and a specific height point. The weight of the liquid can be derived from the mass and force (gravity). The mass can be derived from the density and volume of the liquid. The volume of a liquid can be derived from the dimensions of the vessel containing the liquid. If the vessel has a fixed length and width, then the height is directly proportional to the volume, mass, weight and therefore the pressure.

A hydrostatic level sensor is an instrument for measuring the height of a liquid and converting it to an electrical signal. The hydrostatic level signal output can then be utilised by other instrumentation to display, monitor, log or control the liquid level.

There are many different types of technology used to measure liquid level, there are sensors that can be mounted above the liquid such as ultrasonic or radar which bounce a sound or electromagnetic wave off the surface of the liquid and use the travel time to determine the distance from the liquid surface.

For liquid filled tanks, a pressure sensor can be installed in a hole at the bottom of the tank which measures the hydrostatic pressure generated by gravity acting on the liquid.

Another method is to lower a hydrostatic level sensing probe into the tank and immerse it in the liquid to measure the pressure generated by gravity acting on the surrounding liquid.

Advantages

1. Easily fitted at ground level to any port or take off, which is also convenient for maintenance
2. No protrusion inside vessel
3. Not affected by any surface disturbances such as turbulence, foaming, vibration
4. Small compact size possible
5. Compatible for conductive or non-conductive fluids
6. Flush diaphragm types prevent clogging and works with thick liquids and slurries containing solids

Disadvantages

1. Pressurised or vacuum sealed vessels require a more complex installation
2. SG or density change affects calibration
3. Flush diaphragm types vulnerable to mechanical damage from debris, cleaning processes
4. Requires regular calibration due to gradual error shifts
5. Installed in a position below the lowest required liquid level
6. Fittings must be leak tight
7. Diaphragm movement vulnerable to clogging, wear and tear
8. High cost