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.

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.
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.

BMS water tank 6mH2Og range 0-10V out submersible level sensor for commercial buildings - This submersible level sensor provides accurate and reliable water level measurement in BMS applications in commercial office buildings, with a 0 to 6 mH2O gauge pressure range and a 0 to 10V output signal.
3m range 4-20mA output submersible hot water tank level sensor - This submersible level sensor is suitable for use in hot water tanks. It features a 4-20mA output, 0-3m measurement range, and high-temperature resistance up to 125°C (257°F).
Borewell water level sensor for 100m water height - Low cost solution to measuring the water level in a borewell with a water height of as much as 100 metres above the submerged sensor
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.
Modbus RTU RS485 submersible borehole water level sensor - Easy-to-integrate digital water level sensor with Modbus RTU protocol. Ideal for remote monitoring and data acquisition in boreholes.
Robust hydrostatic level sensing in aerial firefighting water tanks - Facing reliability issues with fragile vented sensor cables? See how a ceramic diaphragm level transmitter with a heavy-duty cable provided a durable solution for measuring water and retardant levels.

Measuring fuel and water tank levels on ferries with a hydrostatic transmitter - Marine certified level sensors for ferry onboard fuel, water, and sewage tanks up to 2.4 meters
Abstraction pump protection using a screw-on hydrostatic level transmitter in a tidal river - Learn about the deployment of a 4-20mA screw-on hydrostatic level sensor for monitoring fluctuating seawater levels. Key aspects include the benefits of a fixed threaded mounting, diaphragm vulnerability without a nose cone, and protecting the atmospheric vent tube.
Desalination plant feed tank submersible level sensor - Highly durable submersible level sensor designed for harsh desalination plant environments. Copper-nickel alloy housing and ceramic diaphragm ensure long-term reliability in aggressive saline conditions. 4-20mA output, 0-5mH2O range.
6m range 4-20mA submersible animal feed tank level and PT100 sensor - A hi-temp media 125°C/257°F max, RTD temperature measurement submersible liquid level sensor for submerging in an animal feed tank and measuring the depth over a range of 0 to 6m from the flush diaphragm, and sending the corresponding 4-20mA signal through the submersible cable electrical connection.
Floating dry dock ballast tank 14ft range 4-20mA output submersible seawater level sensor - 14ft range submersible level sensor for monitoring the level of seawater in floating dry dock ballast tanks.
Storm water detention tank submersible level transmitter for measuring up to 20ft depth - Monitor water levels in storm water detention tanks with the LMK382 submersible level transmitter. This IP68 rated sensor features a 20 ftWG range, 4-20mA output, and a detachable nose cone for easy maintenance.

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.
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.
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
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.
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
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.

Contents

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

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

Disadvantages

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