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.
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:
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 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 |
Measurement Modes | Continuous, Single, Multiple |
Measurement Technique | Mechanical Oscillator Method |
Accuracy | Density: 0.00005 g/cm³ |
Repeatability | Density: 0.000005 g/cm³ |
Resolution | Density: 0.00001 g/cm³ (Extra Resolutions Available) |
Option: Plus Performance | Accuracy: Density: 0.00001 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 |
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.
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.
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.
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.
The applications of digital density meters vary from industry to industry. Here is a list of commonly sought-after features that each industry has:
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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