Density and Concentration Meter DIMF

The liquid density meter of the DIMF series is used for continuous measurement of the density/concentration of liquids or liquid mixtures. The proven tuning fork principle guarantees a high acccuracy with very good long term stability.The robust design ensures reliable operation even under harsh operating conditions.

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Description

Description

Operating Principle

The DIMF series density/concentration meter is based on the oscillating element principle. The fluid to be measured flows through the oscillating element (a tuning fork for Type 1.3, an oscillating tube for type 2.0) that is excited electro-magnetically and will oscillate at its natural frequency. Changes in the density of the fluid lead to changes in the natural frequency. These frequency changes will be picked up by the electronic transducer and converted into a signal proportional to density or concentration

DIMF 1.3 Hollow tuning fork; Measurement of almost all pumpable non-aggressive liquids or liquid mixtures, especially hydrocarbons – for custody transfer applications
DIMF 2.0 / 2.1 Vibrating element in the form of a Tuning fork bent tube; for chemicals and aggressive media

DIMF

Applications

Continuous monitoring of density, mass flow measurement, fiscal measurements, quality control, monitoring of waste water, product recognition, dosing, injection or blending of additives, control of chemical reactions, measurement of concentrations, monitoring and control of distillation, filtration, sedimentation, mixing or fermentation processes, process control, measurement of solid percentages in liquids, measurement of foams and suspensions, Beverage, °Brix, °Plato, etc.

Characteristics

  • high repeatability
  • maintenance-free
  • high long-term stability

Special Features

  • special calibrations within the required density range
  • fiscal metering for DIMF 1.3 (Evaluation certificate)
  • also useable  for highly aggressive liquids, pastes and foams
  • output signals scalable for density and concentration
  • materials: stainless steel, Hastelloy, Tantalum, Monel, Inconel etc.
  • 400- points correction table for customer specific calibration

Technical data

Nominal size DN6 to DN50 (1/8“ bis 2“)
Process connection Flanges or Swagelok, sanitary threads, sterile fittings
Material Stainless steel, Hastelloy, Tantalum, Monel, Inconel, 304L
Flow Range

0 to 5,000 kg/m³  (0 to 312 Ib/ft³)

Accuracy
Repeatability
up to ±0.01%  (0,1 kg/m³ depending on model)
0.005%
Process temperature   

-40°C to +210°C  (-40°F to +410°F)

Process pressure  
up to 300 bar (4,351 psi)
Output current output, frequency output, RS232
Ex-protection Flame proof or intrinsically safe

Measuring Range

DIMF Series 1.3 Series 2.0
Density Range 0 to 5 g/cm³ 0 to 5 g/cm³
Recommended Flow Rate     0.3 – 1 l/min 1.5 – 6 l/min
Suitable for Hydrocarbons  very corrosive media  
Accuracy 0.01%, Custody Transfer    0.02%
About Bopp & Reuther

Products & Features

Bopp & Reuther Messtechnik GmbH is a German-based manufacturer founded in 1872. The company is globally recognized for its expertise in high-precision flow, density, and concentration measurements. The company is best known as the inventor of the oval wheel meter principle (patented in 1932). Their current portfolio includes: 

  • Flow Meters: Oval wheel meters (OaP, OP, OI, OC, OK, Flowal, OD), Coriolis mass flow meters, turbine meters, vortex meters, and electromagnetic flowmeters.
  • Density & Concentration: for liquids and gases.
  • System Solutions: Dosing and filling solutions, flow computers metering skids
Benefits
  • No Inlet/Outlet Needed: Oval wheel meters can be installed directly, saving space and piping costs.
  • Independence from Viscosity: Ideal for high-viscosity media where other technologies fail.
  • Low Maintenance & Durability: Long service life due to rugged construction.
  • Short Dosing Times: Electromagnetic flowmeters and Coriolis meters offer quick batching times, some under 0.2s, suitable for food/pharmaceutical industries.
  • Comprehensive Solutions: Tailor-made metering skids, including strainers, gas separators, and flow computers.