Level Measurement

Explore our comprehensive suite of level sensor products, tailored to meet a range of applications. We offer hydrostatic level sensors, level transmitters, and level gauges, all adeptly utilizing the hydrostatic principle for precise measurements. Our product assortment includes robust submersible level transmitters as well as easy-to-install screw-in type level transmitters. All of these come with flexible digital or analogue outputs to integrate seamlessly into your systems. Choose from 4-wire millivolt, voltage, or 4-20mA current options, along with SDi-12, RS485, HART, and i2c compatibility. Dive into our collection to find solutions that blend innovation, precision, and efficiency.

Hydrostatic level measurement explained

Hydrostatic level measurement works by sensing the pressure created by the height of liquid above a measuring point, then converting that pressure into a level reading. This approach is widely used because it is reliable, accurate, and well suited to tanks, boreholes, reservoirs, rivers, and other open or closed vessels where continuous monitoring is needed.

Many hydrostatic systems use a submersible probe suspended to the required depth. As the liquid level changes, the hydrostatic pressure at the sensor changes proportionally and the transmitter converts that into a stable output signal for your PLC, data logger, or telemetry system. If you are specifically looking at probe based installations, our range of submersible level sensors and level transmitters includes options designed for long term field deployment and industrial use.

Level sensors vs level transmitters

Although the terms are often used interchangeably, it can be helpful to separate them:

  • A level sensor is the sensing element or probe that detects the hydrostatic pressure created by the liquid column.
  • A level transmitter conditions that signal and outputs a standard measurement signal that your system can use for monitoring and control.

Across the Stork range, outputs can be selected to fit your application, including analogue signals such as 4-20 mA and digital interfaces such as SDI-12, RS485, HART, and i2c as listed on the main level measurement page. This flexibility is useful when integrating level measurement into existing control systems or remote monitoring networks.

Choosing the right level measurement solution

A good specification starts with the installation and the liquid being measured. Key selection factors usually include:

  • The required measuring range and accuracy
  • Liquid type and compatibility with wetted materials
  • Whether the liquid is clean, slightly polluted, or aggressive
  • Cable length, mounting method, and available access for installation
  • Output type required for control, logging, or telemetry

If you need a straightforward installation into a vessel or pipework connection point, screw in level transmitters can be a practical option, particularly where a fixed mounting is preferred over suspension. Where you need a robust probe for water courses, tanks, or boreholes, the submersible level sensor and transmitter range is typically the most direct fit.

Typical applications for hydrostatic level sensors

Hydrostatic level measurement is commonly used for:

  • Water tanks and storage vessels
  • Rivers and reservoirs for environmental monitoring and flood defence
  • Boreholes and groundwater monitoring
  • Industrial process tanks where continuous level feedback is needed
  • Wastewater and slightly contaminated fluids, depending on probe selection

For example, the SLS-A submersible level transmitter is positioned for monitoring applications such as rivers, reservoirs, and boreholes, where stable and repeatable measurement is important over long periods.

Related measurement products

Level measurement often sits alongside other instrumentation, especially where you are monitoring pressure, flow, or system performance in parallel. If your application also requires pressure monitoring or control, you can explore Stork’s broader pressure measurement range, including pressure sensors for continuous measurement and pressure switches for on off control at defined set points.

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