Hydrostatic pressure transmitters provide an accurate and reliable solution for determining fluid level in a variety of industrial and process applications. These specialized pressure sensors convert the hydrostatic pressure exerted by a liquid column into a proportional electrical signal, typically a 4-20mA current loop output.
LMP307 Submersible Level Transmitter - Submersible level transmitter for measuring liquid level with a 4-20mA current loop or a 0-10V voltage output plus optional ATEX approval for intrinsically safe use in hazardous areas in ranges from 1mH2O up to 250mH2O. The LMP307 is suitable for use on potable water with no leaching, and can be supplied with a drinking water certificate according to DVGW and KTW.
LMK458 Marine Approved Hydrostatic Level Transmitter - Marine approved level transmitter with 4-20mA output for measuring level of contents inside ship ballast, fuel, liquid cargo or wastewater tanks
18.605 G Low Cost Submersible Diesel Fuel and Water Tank Level Sensor - Low cost OEM diesel fuel or water level sensor for installing inside or outside a storage tank. 
LMK382 Low Range IP68 Waste Water Level Transmitter - Submersible Low Range waste water level transmitter with intrinsically safe option for monitoring the level of sewage and effluent in water treatment plants.
DPT200 Pressurised Tank Level Differential Pressure Transmitter - Pressurised tank liquid level differential pressure cell transmitter for process plant storage.
LMK387 Cleanable Sewage and Sludge Pressure/Level Sensor - Rugged and easily cleanable pressure/level sensor for use with waste water sewage or sludge.
- Contaminated groundwater submersible plastic body 5 psi pressure transducer & display
- Underground rain water storage tank level sensor and readout for 2 metre depth
- Dirty water, sludge & sewerage tank level 400 mbar pressure sensor
- 200m deep well pump water level sensor, switch & display
- Potable water underground 10ft dia storage tank temperature and level sensor
- Lightning protected submersible level sensor for hydroelectric intakes and rivers
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.
Send us your enquiry to discuss your Hydrostatic Pressure Transmitters application with a product specialist, and they will help you select the best option to suit your specific requirements.
Hydrostatic pressure transmitters are essential tools for industries requiring accurate liquid level measurement in tanks, vessels, and other containers. By directly measuring the pressure at the bottom of a liquid column, these sensors provide a reliable indication of the fluid level above them.
Hydrostatic pressure is the pressure exerted by a fluid at rest due to the force of gravity. The pressure at any point within a fluid column is directly proportional to the height of the liquid above that point, its density, and the acceleration due to gravity.
A hydrostatic pressure transmitter typically consists of a pressure sensing element, signal conditioning electronics, and a housing. The sensing element, often a diaphragm or strain gauge, measures the pressure exerted by the liquid column. This pressure is then converted into an electrical signal, usually a 4-20mA current loop output, which can be easily transmitted to a control system or display device.
Hydrostatic pressure transmitters offer a practical and effective solution for accurate liquid level measurement in a wide range of industrial and process applications. Their reliability, ease of use, and versatility make them a valuable asset for any facility requiring precise level monitoring and control.
Product Advantages
Hydrostatic pressure transmitters are engineered for demanding industrial environments, providing a blend of precision, durability, and operational ease. Their design ensures consistent performance, streamlined maintenance, and adaptability across various fluid monitoring applications.
Accuracy and Reliability
These transmitters offer high accuracy and stability, ensuring precise level measurements even in challenging environments.
Simple Installation and Maintenance
Hydrostatic pressure transmitters are designed for easy installation and minimal maintenance, saving time and resources.
Versatility
These transmitters can handle a variety of liquids, including water, chemicals, and fuels, making them suitable for various industries.
Robust Construction
Built to withstand harsh industrial conditions, these transmitters feature durable materials and construction to ensure long-term performance.
Product Applications
Hydrostatic pressure transmitters serve as essential components across diverse industries by providing accurate, continuous, and non-intrusive fluid level measurements. Utilizing gravity and media density principles, these sensors effectively translate liquid column head pressure into actionable electronic data to streamline automation, maintain safety thresholds, and ensure process stability.
Storage Tanks
In industrial storage infrastructure, precise level monitoring is required to manage inventory accurately, prevent catastrophic overfills, and optimize logistical restocking schedules. Hydrostatic pressure transmitters are frequently installed at or near the bottom of vented or atmospheric storage tanks containing water, chemicals, petrochemicals, or liquid fuels. By continuously sensing the hydrostatic force exerted by the liquid column above the diaphragm, these transmitters deliver real-time readings that integrate seamlessly into automated control and SCADA systems, ensuring reliable volume tracking regardless of foam formation or turbulent surface conditions.
Processing Vessels
Industrial reactors, mixing tanks, and reaction vessels operate under dynamic conditions that demand steady process control and strict safety compliance. Hydrostatic pressure sensors placed in processing vessels help monitor fluid batch sizes, ingredient additions, and chemical reactions over time. Their rugged design and chemical compatibility allow them to withstand aggressive fluids, elevated temperatures, and mechanical agitation while continuing to transmit precise level data required to uphold quality standards, prevent reaction runaway, and maintain seamless batch production cycles.
Header Tanks
Header tanks play a crucial role in gravity-fed water distribution systems, heating networks, and industrial cooling loops where maintaining consistent head pressure is imperative. Installing hydrostatic transmitters on header tanks guarantees that fluid volume remains within tight operational parameters. Continuous monitoring allows automated inlet valves and booster pumps to respond dynamically to system demands, preventing low-head pressure drops or overflow conditions, and maintaining consistent hydraulic balance across the entire distribution network.
Pump Inlet Head
Pump performance and service life depend heavily on maintaining sufficient Net Positive Suction Head Available (NPSHA) at the pump inlet. Hydrostatic pressure transmitters installed upstream of major pumps accurately measure the liquid column height to verify that minimum head pressure requirements are satisfied before pump activation. This continuous feedback loop prevents dangerous dry-running scenarios and destructive cavitation, ultimately extending equipment lifespans, reducing emergency downtime, and protecting expensive pumping infrastructure.
Open Channels and Reservoirs
In environmental monitoring, municipal wastewater management, and agricultural irrigation networks, tracking water levels in open channels, flumes, streams, and natural or man-made reservoirs is critical. Submersible hydrostatic pressure transmitters suspended directly into water bodies deliver high-precision level tracking immune to surface debris, floating ice, or ambient atmospheric vapor. Their robust construction supports long-term remote operation, providing vital data for flood forecasting, environmental compliance, runoff management, and efficient water allocation.
Product Selection
Selecting the correct hydrostatic pressure transmitter is critical to ensuring long-term performance, reliability, and process efficiency. By carefully evaluating specific operational needs—such as the required measurement span, material compatibility with the media, and environmental constraints—you can choose a device that provides accurate data and withstands the demands of your unique application.
Measurement Range
Matching the transmitter’s pressure range to the application is fundamental to system accuracy. It is essential to select a device calibrated for the maximum liquid level expected, providing sufficient overhead while maintaining high resolution across the operational span. A range that is too low risks damage from over-pressure, while a range that is too high can compromise the sensitivity required for accurate level detection.
Accuracy
Accuracy requirements are driven by the tolerance for process deviations and the need for reliable data. High-precision sensors are vital in critical applications where small measurement errors can lead to process instability or inventory inaccuracies. When selecting a transmitter, consider the impact of potential errors on your control loops and ensure the device’s specified accuracy aligns with your process safety and quality standards.
Material Compatibility
The wetted parts of the transmitter—including the diaphragm and seals—must be chemically compatible with the process media to prevent corrosion and premature failure. Whether monitoring water, aggressive chemicals, or petroleum products, selecting the correct materials (such as stainless steel, Hastelloy, or specialized coatings) is vital. Failure to account for chemical reactivity can lead to diaphragm degradation, sensor drift, and costly system downtime.
Output Signal
The output signal must be fully compatible with your existing monitoring and control hardware, such as PLCs, data loggers, or SCADA systems. While the standard 4-20mA current loop is widely used due to its robustness against electrical noise over long distances, other options like voltage outputs (0-10V) or digital protocols (HART, Modbus) may be necessary depending on your control architecture. Ensure the selected transmitter’s output seamlessly integrates into your existing electrical infrastructure.
Environmental Conditions
The operating environment often dictates the ruggedness required for reliable long-term service. Beyond the liquid itself, external factors such as ambient temperature extremes, high humidity, vibration, and the risk of lightning strikes or mechanical impact must be assessed. Choosing a transmitter with appropriate Ingress Protection (IP) ratings and robust housing ensures it remains functional despite harsh external conditions, minimizing maintenance and preventing failure.