Level Instrumentation > Transmitters > Lesman Bubbler Systems

Air Bubbler Systems for Liquid Level Measurement

Are bubbler systems still viable for measuring liquid level? Yes, they are. And Lesman can build one for you.

A bubbler system in an inexpensive yet accurate way to measure the fluid level in open or vented containers. A complete bubbler level measurement system consists of a source of compressed air, an air flow restrictor, sensing tube, and pressure transmitter.

Air bubbler systems contain no moving parts, making them suitable for measuring the level of water, viscous fluids, liquids with large quantities of suspended solids, slurries, sewage, drainage water and sludge. The only part of the sensor that contacts the liquid is a dip tube that is chemically compatible with the material being measured. Since the point of measurement has no electrical components, the technique is a good choice for most fluids and especially good for fluids classified as hazardous.

What makes the bubbler more safe is that the system controls are located outside the tank in a separate enclosure with only the pneumatic plumbing running to the tank, isolating the hazardous from the safe area.

Key Specifications

  • NEMA 4 panel with hinged door, sub-panel and wall-mount bracket kit
  • Coalescing filter
  • HART®-compatible pressure transmitter configured for level
    (Siemens SITRANS P DS-III or Honeywell SmartLine ST700 or ST800)
  • Siemens 62VA constant differential relay for air flow volumetric flow rate with indicating flow rotameter
  • Polyflo plastic tubing and brass push-to-connect fittings inside the panel, compression fitting buklhead connections for air and bubbler supply
  • Options include air supply filter/regulators, solenoid valves, power supplies, and other components necessary for your specific application.
  • Build a level bubbler system online, or call 800-953-7626 and ask our application specialist to help build a bubbler to your specification.

Supporting Documentation
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Type Description Size
Lesman Catalog PDF Lesman Catalog Section: Level Measurement and Control Instruments 4.5MB
Bubbler system diagram and specific gravities Lesman Bubbler System Diagram and Level Calculation Tips 133KB
Siemens Bubbler Theory 101 Bubbler Theory 101: Air Bubblers for Liquid Level Measurement 195KB
Siemens Series 62 Constant-Differential Relay Specification Catalog Siemens Series 62 Constant-Differential Relay Specification Catalog 64KB
Siemens Series 62 Constant-Differential Relay User Manual Siemens Series 62 Constant-Differential Relay User Manual 567KB
Siemens 91-HF Combination Filter-Regulator Specification Catalog Siemens 91-HF Combination Filter-Regulator Specification Catalog 51KB
Siemens 91-HF Combination Filter-Regulator User Manual Siemens 91-HF Combination Filter-Regulator User Manual 138KB
Download Siemens SITRANS P DS-III documents Siemens SITRANS P DS-III Transmitter Specifications and Manuals Varies
Download Honeywell SmartLine ST700 documents Honeywell SmartLine ST700 Transmitter Specifications and Manuals Varies
Download Honeywell SmartLine ST700 documents Honeywell SmartLine ST800 Transmitter Specifications and Manuals Varies

 
Last Ed. Date: 10/10/2014 03:53 PM