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.

• 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.
• CIP protected dairy sensor for measuring level of milk in 6m high tank - Hygienic pressure sensor designed for CIP cleaning in dairy applications. Withstands harsh chemicals and high temperatures. Accurate and reliable level measurement in milk silos.

• Underwater 50 metre sea depth 4-20mA output sensor - All titanium underwater sensor for measuring seawater depth with a measurement range of 0 to 50 metres providing a 4 to 20 mA output signal.
• Generator fuel oil day tank drop-in 200mb hydrostatic level sensor - 200 mbar range hydrostatic level sensor for measuring the quantity of generator fuel oil in a day tank.
• 2 metre deep diesel tank level sensor for submersion - Ensure continuous operation of diesel powered equipment with this durable level sensor. Features FEP cable and 4-20mA output.
• Low powered pond water 20ft depth sensor for wireless system - Submersible pressure sensor ideal for wireless pond depth monitoring systems with long cable runs. Features low power consumption and amplified output for reliable data transmission.
• 50 metre borehole water depth transmitter for dry running protection - This 50 metre depth sensor provides accurate water level measurement in boreholes, ideal for irrigation, water supply, and industrial applications.
• Level transmitter for waste water tank 10 feet deep - Monitor wastewater levels with this submersible level transmitter. Ideal for 10ft deep tanks, this sensor provides accurate hydrostatic level measurement in harsh environments.

• LMP307 Submersible Level Transmitter
• LMK458 Marine Approved Hydrostatic Level Transmitter
• DPT200 Pressurised Tank Level Differential Pressure Transmitter
• 18.605 G Low Cost Submersible Diesel Fuel and Water Tank Level Sensor

• 5 kPa g range 0-5 Vdc output fuel oil pressure sensor for liquid level measuring use
• Ferric Chloride solution hydrostatic level transmitter
• 400mm water level transmitter with 1mm accuracy
• Hydrophone array submersible 200 meter seawater depth sensor
• Grease trap waste receiving tank 2m range 4-20mA level transmitter
• Geothermal pool high temperature submersible level transmitter

• OEM sensor for diesel tank level measurement - Submersible hydrostatic level sensor for OEM integration in diesel fuel tanks. Low-power, 0.5 to 4.5V output.
• Remote water tank level monitoring via GSM mobile network - Monitor water levels in multiple tanks remotely using submersible sensors and GSM technology. Configure alarms for high/low levels and receive alerts via SMS or email.

• Low power consumption fuel tank level sensor - Reliable and accurate fuel level measurement in remote locations. Battery-powered with low power consumption.
• 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.
• 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 - We need to measure the water level in a well down to 200 meters to protect a well pump by ensuring that it always stays under water
• 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.
• 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.

• LMP305 Borehole Level Transmitter
• LMK387 Cleanable Sewage and Sludge Pressure/Level Sensor
• DCL 531 Modbus RTU RS 485 Submersible Stainless Steel Liquid Level Sensor
• DCL 551 RS485 Modbus RTU Submersible Low Range Fuel, Oil & Wastewater Level Probe

• 0.2 bar tank level pressure sensor for fuel oil up to 2m deep
• Submersible 3mWG range 4-20mA output liquid level and PT1000 temperature sensor
• High temperature de-ionised water bath 300mm ATEX level sensor
• Dairy farm 6m high milk storage vat 4-20mA level transmitter
• 10 metre submersible water depth and temperature transducer with USB digital connection
• 10 metre sea water depth sensor with millivolt output

• Chemical Resistant Hydrostatic Liquid Level & Pressure Sensors - Pressure transmitters & transducers that are resistant to chemical corrosion for measuring the hydrostatic level of storage tanks or process pressures.
• 4-20mA Output Hydrostatic Level Transmitters & Sensors - Liquid level transmitters with a 4 to 20 milliamp current loop output signal for determining liquid depth or the fluid level by measuring the hydrostatic pressure.
• 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
• 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
• 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.
• 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.
• 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.
• 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.
• 0-10 Volts Output Hydrostatic Sensors, Probes & Transducers - Analog output hydrostatic sensors with a 0 to 10 volt amplified output signal for measuring liquid head pressure or fluid level.
• SDI-12 Hydrostatic Liquid Level Sensors - SDI-12 interface hydrostatic level sensors with a serial digital interface for measuring liquid depth and returning the reading to low powered telemetry instrumentation in remote locations.
• 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.

• LMK382 Low Range IP68 Waste Water Level Transmitter
• LMK807 Plastic Submersible Level Transmitter
• ATM/N Titanium Submersible Hydrostatic Pressure Transmitter
• 36XW Digital Submersible Hydrostatic Level Sensor

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