Explore BD Sensors comprehensive range of submersible hydrostatic level probes, engineered for precise liquid depth measurement in diverse industrial and research applications.
These IP68-rated probes are available in a variety of materials, including stainless steel 316L, Copper-Nickel/Titanium alloy, and Plastic/Ceramic/FFKM, ensuring compatibility with a wide range of liquids and operating conditions. Certified and approved for use in hazardous areas, marine environments, and drinking water systems, BD Sensors submersible probes deliver reliable performance and accurate measurements in demanding applications.
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. 
DCL 531 Modbus RTU RS 485 Submersible Stainless Steel Liquid Level Sensor - Digital submersible stainless steel liquid level sensor with a Modbus RTU protocol RS 485 serial bus interface.
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.
LMK387 Cleanable Sewage and Sludge Pressure/Level Sensor - Rugged and easily cleanable pressure/level sensor for use with waste water sewage or sludge.
LMP305 Borehole Level Transmitter - Submersible stainless steel pressure transmitter ideal for geotechnical surveying with a 19mm diameter for measuring hydrostatic water level in bore-holes.
DCL 551 RS485 Modbus RTU Submersible Low Range Fuel, Oil & Wastewater Level Probe - Low range digital interface submersible liquid level probe with RS 485 Modbus RTU protocol serial bus communications for measuring level of fuel, oil and wastewater in low fill height open tanks.
LMK807 Plastic Submersible Level Transmitter - IP68 mid range pressure transmitter for measuring the level of highly contaminated and aggressive liquid media with a body made from PP-HT.
LMK 806 Plastic 21mm diameter Submersible Level Probe - The chemical resistant LMK806 submersible level probe is designed for use in confined spaces with aggressive media.
LMP 308 Removable Waterproof Cable Connection Water Level Sensor - Groundwater, tank & reservoir water level detachable submersible cable hydrostatic liquid level sensor for multiple municipal water level measurement locations.
DCL 571 RS485 Modbus RTU Submersible 22mm dia Groundwater & Wastewater Level Probe - 22mm diameter digital interface submersible liquid level probe with RS 485 Modbus RTU protocol serial bus communications for installing in 1" diameter tubes to measure groundwater level and measuring wastewater with nose cone removed.
LMK 487 Submersible Ballast Tank and Draught Level Pressure Transmitter - A 22mm diameter titanium body seawater depth and level probe with a 4-20mA output with Lloyds and DNV-GL ship approval, for monitoring the quantity of ballast or the draft of a ship’s hull.
LMK 858 Plastic Submersible Liquid Level Sensor with Removable Cable - Chemical resistant liquid level sensor with detachable signal cable for measuring quantity of aggressive media such acids and alkalis and sludge in tanks located outside of factory buildings.
LMK307 Submersible Waste Water Level Sensor - Submersible waste water level sensor with optional intrinsic safety certification for monitoring the level of sewage and effluent in water treatment plants.
LMK457 Marine Approved Level Transmitter - Marine approved level transmitter with 4-20mA current loop output for shipbuilding with optional all CuNiFe construction for sea-water compatibility in ranges from 0.4 mH2O to 250mH2O gauge.
LMK809 Plastic Submersible Low Level Transmitter - IP68 low range pressure transmitter for measuring the level of highly contaminated and agressive liquid media with a body made from PP-HT or PVDF.
LMK306 Ground Water Level Transmitter - IP68 sealed hydrostatic level transmitter with a 17mm diameter for lowering into ground water boreholes for environmental monitoring of water level.- LMP307T Submersible Level and Temperature Transmitter - The LMP307T is a submersible level and temperature transmitter with a level sensing range from 1 to 250 mH2O and a temperature sensing range of 0 to 30°C up to 70°C.
BD Sensors offers a diverse range of submersible liquid level probes designed for precise depth measurement in various industrial and research applications. These probes utilize hydrostatic pressure sensing technology, providing accurate and reliable measurements in a variety of liquids and challenging environments.
Key Features
- Hydrostatic Pressure Sensing: The probes measure liquid depth by accurately sensing the hydrostatic pressure exerted by the liquid column. This technology ensures reliable and stable measurements even in turbulent or fluctuating liquid conditions.
- Diverse Material Options: BD Sensors offers submersible probes constructed from a range of materials to ensure compatibility with various liquid types and operating conditions. Options include:
- Stainless Steel 316L: Ideal for clean and hygienic applications, commonly used in food and beverage processing, pharmaceuticals, and water treatment.
- Copper-Nickel/Titanium alloy: Specifically designed for marine and offshore applications, providing excellent corrosion resistance in saltwater environments.
- Plastic/Ceramic/FFKM: Suitable for use with aggressive chemicals, ensuring long-term durability and performance in demanding industrial processes.
- IP68 Rating: All submersible probes are IP68 rated, guaranteeing complete protection against continuous immersion in liquids, making them suitable for use in submerged or very wet environments, outdoor installations and areas prone to flooding, above or below ground level.
- Certifications and Approvals: BD Sensors offers probes with specialized certifications and approvals, including:
- Hazardous area approvals: Ensures safe operation in potentially explosive atmospheres, such as oil and gas refineries, chemical processing plants, and mining operations.
- Ship use approvals: Certified for use in marine applications, meeting stringent safety and performance standards for onboard liquid level monitoring.
- Drinking water approvals: Suitable for use in potable water systems, ensuring compliance with health and safety regulations.
- Safety Integrity Level (SIL) ratings: Provides assurance of the probe’s reliability and functional safety in critical applications where level measurement is essential for preventing hazardous events.
Applications
BD Sensors submersible liquid level probes are widely used in various industries and applications, including:
- Water and Wastewater Management: Monitoring water levels in reservoirs, tanks, and pumping stations, as well as measuring the depth of wastewater in treatment plants and sewage systems.
- Marine and Offshore: Measuring the depth of seawater, ballast tanks, and fuel tanks in ships, offshore platforms, and marine research vessels.
- Industrial Process Control: Monitoring liquid levels in tanks and vessels in various industrial processes, including chemical manufacturing, food processing, and pharmaceuticals.
- Environmental Monitoring: Measuring groundwater levels, monitoring the depth of surface water in rivers and lakes, and assessing the level of contaminants in underground storage tanks.
- Oil and Gas Production: Monitoring the level of oil, gas, and water in storage tanks and separators.
Submersible Liquid Level Probe Selection Table
Product Help
Programmable range
Are any of the level probes programmable to a specific range on site? For example, can you order a probe with a 1m depth sensor and program the 4-20mA output to 0 – 0.8m as needed onsite?
Yes the H versions (e.g. LMK382H) are programmable using the HART protocol with a maximum turndown of 10:1.
S-curves for non-linear tank contents with pressure
Are any of the probes programmable with S-Curves for applications like horizontal cylindrical tanks with rounded ends?
This is not possible inside the level probe, but typically the solution is to do the linearisation in the connected instruments, which makes things a lot more standard and more cost-effective rather than trying to calibrate the sensor to achieve this. For instance, the SRP range such as SRP-94, and SRP-N118 all have 20-point linearisation that you can accommodate all types of tank shapes. Also this can be achieved with a signal converter with the capability to add custom linearisation such as the ISOCON-LIN.
This also means you can use a standard range sensor like 1mWG for instance and it’s all calibrated in the instrument to accommodate a lower range such as 0.6 mWG full scale for example.