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.

• 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.
• 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.

• LMP307 Submersible Level Transmitter
• DCL 531 Modbus RTU RS 485 Submersible Stainless Steel Liquid Level Sensor
• 18.605 G Low Cost Submersible Diesel Fuel and Water Tank Level Sensor
• DPT200 Pressurised Tank Level Differential Pressure Transmitter

• 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.
• 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.
• Marine aquaculture submersible seawater level & temperature transmitter - Use this dual output transmitter for monitor or controlling the water level and temperature of salt water ponds & tanks used in marine aquaculture systems.
• High temperature liquid level measurement for geothermal energy and thermal bath management - Discover how high-purity ceramic diaphragms and specialized TPE cabling ensure accurate hydrostatic level monitoring in fluid environments reaching 125degC, providing a robust solution for geothermal and industrial heat applications.
• Wastewater holding tank submersible hydrostatic level monitoring pressure transmitter - Monitor liquid levels in wastewater holding tanks with a flush diaphragm sensor designed to prevent clogging from grease and particulate matter in hazardous zones.

• LMK458 Marine Approved Hydrostatic Level Transmitter
• LMK387 Cleanable Sewage and Sludge Pressure/Level Sensor
• LMK809 Plastic Submersible Low Level Transmitter
• LMK331 Screw-In Ceramic Level Transmitter

• SDI-12 submersible tide level gauge for harbour navigational safety - Monitor coastal sea levels and harbor depths with a low-power digital interface sensor built to withstand abrasive silts and corrosion in demanding littoral zones.
• Dual level and temperature monitoring in hotel water treatment tanks - Single submersible probe provides simultaneous water level and temperature monitoring with dual 4-20mA outputs for a hotel's water treatment system.
• Groundwater heat pump well monitoring using dual-parameter level and temperature probes - Dual-output 4-20mA solutions for monitoring aquifer levels and source water temperatures in open-loop geothermal systems requiring long cable runs.
• Long range battery powered well level measurement with 4-20mA to Cellular Cloud to 4-20mA integration - Monitor remote freshwater wells using submersible ceramic sensors and cellular gateways to provide 4-20mA signals to a local PLC without onsite power.
• Flood prevention in underground pump rooms using 4-20ma hydrostatic level sensors - Prevent pump room flooding by integrating a low-range submersible hydrostatic level sensor into a VFD for early leak detection and automated system protection.
• Fuel level monitoring for heritage vessels using existing tank valves - Upgrade your heritage vessel's fuel monitoring without structural changes. This hydrostatic sensing solution uses existing valves for accurate diesel measurement.

• LMK382 Low Range IP68 Waste Water Level Transmitter
• DS200 Combined Hydrostatic Level Switch, Gauge and Sensor
• DCL 551 RS485 Modbus RTU Submersible Low Range Fuel, Oil & Wastewater Level Probe
• LMK807 Plastic Submersible Level Transmitter

• Monitoring flood levels in underground electrical substations with submersible probes
• Monitoring groundwater level in jet fuel contaminated wells using SDI-12 hydrostatic sensor
• High-accuracy sea level monitoring for high-salinity marine environments
• Tidal level measurement with SDI-12 interface seawater level sensor
• Ferric aluminium sulphate level sensor for monitoring coagulant tank in water treatment
• Electrophoretic painting tank level monitoring using flush ceramic transmitters
• Ammonium nitrate level sensing in agitated tanks at high temperature
• Viscous machine tool coolant level measurement with flush diaphragm sensor
• Viscous soap and detergent storage hydrostatic level measurement
• 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

• 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.
• 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.
• 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.
• 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.
• 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.

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