DWF Density Meter

Brand: KOBOLD Instruments, Inc.

The displacer rod, which is attached to a measuring spring by a chain, immerses into the liquid and is subject to a buoyant force proportional to the mass of the displaced liquid.

Every change in the weight of the rod corresponds to a change in the length of the spring and is therefore a measure of the liquid level.

The longitudinal expansion of the spring, i.e. the travel of the rod, will be transmitted from the measuring space to the indicator unit by means of a magnetic coupling. The basic version of the indicator unit consists of a scale with a pointer for displaying the liquid level.

As an option, the indicator unit may be equipped with electrical transmitters for remote display or with limit switches. If the device cannot be installed from above, because, for example, a stirrer is mounted in the container, a special displacement vessel is available for lateral installation.

Since the buoyancy of the displacer rod depends on the density (g /L or kg/m3) of the measured medium, it must have been designed for the specific liquid to be measured.

Specifications

Accuracy

  • ± 1.25 to ± 6 G/l

Ambient Temperature Range

  • -20° to 65° C (-4° to 140° F) - with Switch
  • -20° to 80° C (-4° to 176° F)
  • -40° to 70° C (-40° to 158° F) - Transmitter

Applications

  • Control of Liquid Media in Pipes
  • Density Metering
  • Electrical Equipment
  • Magneto-Resistive Signal Transmission

Approvals & Certifications

  • ASME B16.5
  • ASME Class 150
  • ATEX II 2 G EEx ia IIC T6, DMT 00-ATEX-E 075
  • EN 1092

Communication

  • FOUNDATION Fieldbus
  • HART
  • PROFIBUS PA

Configuration

  • Counter Module

Density Range

  • 700 G/l to 1900 G/l

Electrical Connectors

  • DIN 2512

Electrical Contacts

  • 2 NAMUR Contacts

Electrical Rating

  • 30 V, 120 mA, 100 mW

Environmental Protection

  • IP20 - Transmitter
  • IP65 - Sensor
  • IP67 - Sensor

Flow Rate

  • 2,500 to 10,000 L/hour to Water at 20° C (68° F)

Input

  • Counter Reset - Binary

Input Power

  • 4-20 mA

Materials of Construction

  • Aluminum (Stove-Enameled) - Display
  • Stainless Steel - Display

Measuring Span

  • 50 G/l to 600 G/l

Nominal Pressure

  • PN 16

Output

  • Galvanically Isolated - Transmitter
  • Inductive Switch
  • Micro Switch
  • Passive - Transmitter

Pipe Connection

  • DN 25 ASME Class 1" (TSK1)
  • DN 50 ASME 2" (TSK 2,3)

Power Supply

  • 14-30 Vdc

Process Temperature

  • -20° to 150° C (-4° to 302° F)

Sensor / Probe Material

  • Hastelloy
  • Stainless Steel

Switch Quantity

  • 2 Switches

Switch Type

  • NAMUR

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