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Submersible Liquid Level Sensors

Devices protected from liquid ingress when completely immersed in a fluid for measuring liquid level and converting it to an electrical signal to send to other instrumentation.

  • ATM/N Titanium Submersible Hydrostatic Pressure Transmitter - All Titanium submersible pressure transmitter for measuring the hydrostatic level of leachate, brackish water or sea water. Ranges from 1 up to 250mWC.
  • 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.
  • 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 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.
  • LMK387 Cleanable Sewage and Sludge Pressure/Level Sensor - Rugged and easily cleanable pressure/level sensor for use with waste water sewage or sludge.
  • 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.
  • S12S SDI-12 Coms IP68 Pressure and Temperature Sensor - Combined pressure and temperature sensor with a 1200 baud rate serial data interface as defined by the SDI-12 support group.
  • 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.
  • 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.
  • 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
  • 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.
  • IMCL Low Cost Submersible Pressure Sensor - Economical IP68 protected sensor with stainless steel 316L housing and Ceramic strain gauge sensing diaphragm for measuring liquid depth pressure.
  • 50 metre borehole water depth transmitter for dry running protection
  • Borewell water level sensor for 100m water height
  • Sulfuric acid 12-15% conc. drop-in level probe for 10m high tank
  • 200m deep well pump water level sensor, switch & display
  • 120cm range 4-20mA submersible chemical tank level sensor for farm water line mineral injection
  • Modbus RTU RS485 submersible borehole water level sensor
  • Measuring a 125 mm of water level range to 1mm accuracy
  • 6m range 4-20mA submersible animal feed tank level and PT100 sensor
  • Underground rain water storage tank level sensor and readout for 2 metre depth
  • 1 barg IS certified 4-20mA submersible leachate pressure sensor for tank level gauging use
  • Underwater 50 metre sea depth 4-20mA output sensor
  • 25m borehole submersible pump level indicator and control switch with level sensor

A submersible device can be installed in liquid without causing any damage as long as the installation instructions are adhered to, and the specified depth and time duration limits for submersion are not exceeded.

Assembled devices are vulnerable to liquid ingress, which can enter the device through seals and joints or permeate through components that incorporate thin membranes or porous materials.

To achieve a long lasting submersible construction, the device is constructed from materials which will not easily corrode when exposed to a fluid. Corrosion may cause the material to fail and allow liquid to enter the device, or interfere with the seal joining the corroded material to another component.

The seals used to join device components together are pressure leak tight, resilient to the expected temperature variations and resist corrosion from the surrounding fluid.

All components and seals are designed to withstand the pressure expected at the maximum required liquid depth, and this may involve a series of seals and backfilling with a potting compound or other fill material to improve longevity and reliability at greater depths.

A liquid level sensor is an instrument for measuring the height of a liquid and converting it to an electrical signal which is sent to other instrumentation to display, monitor, log or control the liquid level. The probe is lowered into the tank and immerse in the liquid.  A typical sensor technology employed is a pressure sensor which will measure the pressure generated by gravity acting on the surrounding liquid.

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