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Digital Electronic Hydrometer

Process Controlled

Digital Electronic Hydrometer

Unlike ordinary bulb hydrometers, which are passive-static devices, this new Digital Electronic Hydrometer utilizes new Hall sensor technology that allows for remote, in situ, continuous infinite resolution, real-time monitoring, measuring, logging and controlling of liquid density/specific gravity in large vats or containers during a mixing or blending operation.

The submersible probe head connects, via extension leads, to an electronics module that provides a digital readout of the liquid density in the user's preferred engineering units (sgu, Baume, Brix, % vdc) to a process controller to facilitate meeting a specific target density. Density ranges from .5 to 1.5 square standard and custom ranges are an option.


  • Measures density in sgu (1 sgu = 1 gm/cc) in range from .5 to 1.5 with accuracy ± .005 sgu.
  • Can be battery operated for field operation at waste sites, tank farms, out on a lake or deep into the ocean.
  • Can be operated in situ in a process control operation to monitor and record liquid density during a typical blending or mixing process for the chemical, petroleum, electroplating, or food and beverage industries. As a part of a control system, it can be used to control a mix to meet a target density.
  • Can be used to determine the concentration mix (by volume or mass) of a blend.
  • Can be used as a gauge in storage tanks to determine the interface depth between two immiscible liquids such as alcohol and water.
  • Can be used in a laboratory to monitor and record liquid density during a process controlled temperature or pressure cycle operation.
  • Remote readout at any desired distance from probe, 4 foot leads standard.
  • Pressure invariant - can monitor density at any depth in a well or a tank.
  • Operating temperature range from -40°F to 200°F.
  • Measures in liquids or slurries
  • Easy to disassemble for cleaning
  • Total weight is 5 pounds

 

Principle of Operation

The submersible probe head contains a mathematically characterized spring-float system. When the head is immersed vertically in the liquid, the float moves vertically and the position of the float controls the position of a permanent magnet whose displacement is sensed by a concentric array of Hall-effect linear displacement sensors. The output signals of the sensors are mixed in a dedicated electronics module that provides an single output voltage whose magnitude is a direct linear measure of the quantity to be measured.

The submersible probe head connects to an electronics module that can be 120vac operated or optional battery operated. Basic electronics module provides power to the sensors and contains a programmable process meter that can be push button programmed to provide digital panel meter readout of the quantity to be measured in preferred engineering units (sgu, Baume, Brix, % alcohol, etc.). The electronics module can accommodate optional microprocessor boards that provide a choice of analog outputs of 0-5 vdc or 4-20 ma for process control. The submersible prove head operates on 5 vdc with a total power of less than 120 milliwatts, which renders it intrinsically safe. The submersible probe head has an output 0-5 vdc.

Please note: When asking for quotation please include information as to specific density range, lead length (4-foot standard), and sensor compatibility to the monitoring medium, especially regarding virulent solvents, as sensors are custom made to application. The end user must verify results to their application specifications prior to ordering.

 

Available Items
Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
WG-9010 Submersible Probe and electronics module with panel meter, 120 vac $2,295.00
WG-9021 Submersible Probe Head unit only, operates on 5 vDC and provides 0-5 vDC linear output that is proportional to the liquid density 1,295.00
WG-9033 Optional analog output board (4 - 20 ma or 1-5 vdc) 933.00
WG-9041XX Charge per additional foot of probe lead extension 3.75
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