Digital Density Meters - Rudolph Research Analytical, USA

Among the high-precision analytical instruments manufactured by Rudolph Research Analytical in USA, its digital density meters (also specific gravity meters) are widely used in a variety of industries including chemicals, petroleum, pharmaceuticals, petro-chemicals, and beverages. The plethora of features offered by the DDM series digital density meters make them flexible for both production and research applications.

density-meter

Digital Density Meter Models

To cater to all possible fields of application, RRA offers different models with each one having certain specific features necessary for that application. The following is Rudolph’s line-up of density measurement instruments to suit various applications:

  • Density Meter DDM 2909
  • Density Meter DDM 2910
  • Density Meter DDM 2911
  • Density Meter DDM 2911 PLUS

DDM 2909 Density Meter Specifications

Measurement Ranges

Density: 0 to 3 g/cm³

Temperature: 15°C to 60°C (controlled via Peltier)

Pressure: 0 to 10 bars

Measurement Modes

Continuous, Single, Multiple

Measurement Technique

Mechanical Oscillator Method

Accuracy

Density: 0.0002 g/cm³ with a single calibration at the measurement temperature

Density: 0.0003 g/cm³ with a single calibration and measurement through multiple temperatures

Temperature: 0.05°C

Repeatability

Density: 0.0001 g/cm³
(Extra Resolution Available)

Temperature: 0.02°C

Resolution

Density: 0.0001 g/cm³ (Extra Resolution Available)

Temperature: 0.01°C

Minimum Sample Volume

Less than 1 mL

DDM 2910 Density Meter Specifications

Measurement Ranges

Density: 0 to 3 g/cm³

Temperature: 0°C to 95°C (controlled via Peltier)

Pressure: 0 to 10 bars

Measurement Modes

Continuous, Single, Multiple

Measurement Technique

Mechanical Oscillator Method

Accuracy

Density: 0.0001 g/cm³

Temperature: 0.05°C

Repeatability

Density: 0.00001 g/cm³

Temperature: 0.02°C

Resolution

Density: 0.0001 g/cm³ (Extra Resolution Available)

Temperature: 0.01°C

Minimum Sample Volume

Less than 1 mL

DDM 2911 Density Meter Specifications

Measurement Ranges

Density: 0 to 3 g/cm³
Temperature: 0°C to 95°C (controlled via Peltier)
Pressure: 0 to 10 bars

Measurement Modes

Continuous, Single, Multiple

Measurement Technique

Mechanical Oscillator Method

Accuracy

Density: 0.00005 g/cm³
Temperature: 0.02°C

Repeatability

Density: 0.000005 g/cm³
Temperature: 0.01°C

Resolution

Density: 0.00001 g/cm³ (Extra Resolutions Available)
Temperature: 0.01°C

Option: Plus Performance

Accuracy: Density: 0.00001 g/cm³
Calibration required if temperature setting is changed
Repeatability: Density: 0.000006 g/cm³
Resolution: Selectable 0.000001 g/cm³, 0.00001 g/cm³, 0.0001 g/cm³

Minimum Sample Volume

Less than 1 mL

DDM 2911 PLUS Density Meter Specifications

Measurement Ranges

Density: 0 to 3 g/cm³

Temperature: 0°C to 95°C (controlled via Peltier)

Pressure: 0 to 10 bars

Measurement Modes

Continuous, Single, Multiple

Measurement Technique

Mechanical Oscillator Method

Accuracy

Density: 0.00001 g/cm³

Temperature: 0.01°C

Repeatability

Density: 0.000002 g/cm³

Temperature Selectable to: 0.001°C

Resolution

Density: 0.000001 g/cm³

Temperature Selectable to: 0.001°C

Minimum Sample Volume

1 ml, approximately

Internal Memory

32GB Non-removable Compact Flash

Salient Features of DDM Series Digital Density Meters

Wide Measurement Range

The DDM-series density meters can measure the density of samples ranging from 0° to 90° Celsius. They also offer temperature control which aids accurate analysis of liquid samples at a standardized temperature.

Effective Bubble Detection

Air bubbles in the U-tube can cause the density measurement instrument to malfunction resulting in erroneous values. Since this is a common issue, it is necessary for the U-tube to be visible to the operator. Rudolph Research Analytical density meters come as a relief to this hassle. They are equipped with a high-resolution camera that enables zooming the image of U-tube by up to 10 times. The LCD display provides a live viewing option of the U-tube. This feature is exclusive to the DDM-series density meters and is offered by no other manufacturer.

CGMP/GLP Calibration

Calibrating a density measurement instrument with air or water is not approved by the regulations prescribed by cGMP/GLP compliance. It is advisable to calibrate them with 2 or 3 traceable standards. With the DDM-series digital density meters, calibration requires minimal effort. The oscillating U-tube with full range viscosity correction and reference oscillator enable long term calibration stability and analysis at all temperatures with a single calibration. They also provide the ability to print out complete method configuration, communication settings, and calibration settings data/history.

Communication Capabilities

DDM-series density meters provide different means by which the instrument can communicate with PCs. The options include USB ports, a Cat 5 network cable connection, and 2 RS-232 ports.

Digital Density Meter Applications

The applications of digital density meters vary from industry to industry. Here is a list of commonly sought-after features that each industry has:

Pharmaceutical

  • Capability to measure 3, 5, or more readings with standard deviation, mean, minimum and maximum readings for cGLP/GMP compliance
  • Complete IQ/OQ/PQ documentation
  • Evaluating raw materials and product release
  • 21CFR Part 11 Compliance: Electronic signature & secure data storage
  • Compliance with USP <8417> ISO 17025, JP, BP, and EP

Petroleum

  • Measure API values in accordance with ASTM D1250, ASTM D4052, ASTM D5002, DIN 51757, ISO 12185, ASTM D4806, IP 365, and ASTM D5931
  • Controlling quality of incoming raw materials
  • Analysing new products and additives
  • Ability to withstand harsh and heavy-use environments
  • Calibration for petroleum standards

Chemical

  • Measurement units: kg/m3, g/cm3, g/ml, pounds/gallon, specific gravity, and Baumé
  • Determining concentration in %, molarity, normality, mole fraction, and PPM
  • Checking batch consistency and ensuring proper blending rations
  • Availability of other additional measurement and method options

Beverage

  • Measuring both alcoholic and non-alcoholic beverages with easy bubble detection
  • Simple, direct, and accurate means of °Brix, °Plato, °Balling, and % solids
  • Usage of apparent density function for proper filling volume monitoring

Digital Density Meter Price

Agaram Industries is the exclusive distributor of Rudolph Research Analytical who manufacture digital density meters. To get a quotation with the digital density meter price, you can fill up this form or send an email to sales@agaramindia.com.

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