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Digital Electronic Hydrometer

Liquid Density/Specific Gravity Meter/Monitor

New CPVC Sensor Unit (Chlorinated Polyvinyl Chloride, which is highly resistant to caustic chemicals (including acids) and high temperatures.

Digital Electronic Hydrometer

This Gardco Liquid Density/Specific Gravity Meter/Monitor is the only one of its kind on the market that has all the capabilities of doing a remote, in tank, measure, record, monitor and automatic process control (4 - 20 ma or dual 5 amp relays) of liquid density/specific gravity.

Unlike ordinary desk top or hand held hydrometers -- which are static, passive devices -- these electronic hydrometers are very sophisticated instruments which allow for remote (up to 500 feet), deep in-tank convenient automatic monitoring and/or controlling of liquid density/specific gravity during a mixing or blending operation -- a time and cost saving device. It has many applications in passivation, electroless plating, metal finishing and cleaning, and wastewater monitoring.
  • Measures density in sgu (1 sgu = 1 gm/cc) in range from .5 to 1.5, accuracy ±.005 sgu
  • 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, electro-polishing, passivation, flux density control or food and beverage industry. As 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 oil 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, 10 foot leads standard
  • Pressure invariant - can monitor density at any depth in a well or 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
  • 120V/220V input

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 a single output voltage which the magnitude is a direct linear measure of the quantity to be measured.

Please note: When asking for quotation please include information as to specific density range, lead length (10-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 - Literature
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-901022 NEW CPVC Submersible probe head and electronics module with panel meter, 120 vac P.O.R.
WG-902122 CPVC Submersible probe head only, operates on 5 vdc and provides 0-5 vdc linear output proportional to liquid density. P.O.R.
WG-9033 Optional analog output board (4-20 ma) or dual 5 amp relays P.O.R.
WG-9041XX Charge per additional foot of probe PVC insulation lead extension (Probe lead extension also available in Teflon. Call for Pricing) P.O.R.

Hydrometer can be suited to meet your application - Call For Pricing.
**Please Specify prior to ordering:
1. Operating density range in SGU (specific gravity units)
(For any density liquid range which overlaps 1.200 sgu, a heavy liquid surcharge will apply to hydrometer or sensor only)
2. Liquid chemical characteristics (acid or water base)
3. Viscosity of liquid as compared to water or paint
4. Total length of cable in feet (10 feet is standard)
5. What unit of measurement is preferred (digital readout of the liquid density in the user's
preferred engineering units, i.e. sgu, Baume, Brix, % alcohol.)

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