Wide Range Density Meter
The Rudolph Research Analytical DDM 2911 Plus for pharmaceutical, petroleum and chemical applications
Alcohol density / concentration
Pharmaceutical, petroleum and chemical applications
Highest accuracy
Oscillating U-tube with viscosity correction
Density Meter for Alcohol Measurements
Measure alcohol density / concentration with the DDM 2911 Plus. This high accuracy density meter is our most capable instrument in the Rudolph Research range offering the widest measurement range.
The DDM 2911 Plus features our highest accuracy along with the on-board methods and electronic data tracking required in the most demanding laboratories.
The DDM 2911 Plus is recommended for high-level work in the alcohol, pharmaceutical, chemical and petroleum industries.
With 0.00001 g/cm3 accuracy, the DDM 2911 Plus is an excellent choice to measure alcohol concentration to determine alcohol proof. Designed for the most demanding cGLP/GMP laboratories it offers density accuracy to 0.00001 g/cm3, has a resolution of 0.000005 g/cm³ and is temperature selectable to 0.001°C.
The DDM 2911 Plus provides direct and accurate measurement of:
- °Brix determination
- °Plato
- °Balling
- Proof
- % Solids
Try Before You Buy
The DDM 2911 Plus is available for a short term trial.
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Density Meters
Measurement
High Viscocity Samples
Easy Clean System
Pharmaceutical
- Capable of multiple measurements with standard deviation, min and max reading for true cGLP/GMP compliance
- Complete IQ/OQ/PQ documentation
- Check raw materials and product release
- 21CFR Part 11 compliance, electronic signature and secure data storage
- Compliant with USP 29<841>, 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
- QC incoming raw materials
- Research new products and additives
- Operate in harsh and heavy use environments
- Calibrate using petroleum standards
Chemical
- Measure in units of Kg/m3, g/cm3, g/mL, pounds/gallon, specific gravity, Baumé and more
- Determine concentration in %, molarity, normality, mole fraction, ppm, and more
- Check batch consistency and ensure proper blending ratios
- Wetted materials compatible with the most aggressive chemicals
Flexible Method Management
Factory installed density measurement methods allow for immediate selection of the correct method to match the most common applications. For unique measurement applications, create a sample method using an unlimited number of concentration tables, formulas, and polynomials to match the density measurement methods used in your laboratory or industry.
- Concentration D2O – Heavy Water
- Baumé of Hydrochloric Acid
- Normality of Sulfuric Acid
- Density of Gases and Aerosols
- Drug to Propellant Ratio
- Lead Content
- ppm Gold in Acid
- % Toluene in Heptane
- Fat in Lubricant
Factory installed density meter measurement methods allow for immediate selection of the correct method to match the most common applications.
- Mole Fraction of Methanol
- % HNO3
- Monomer Solutions
- Potassium Permanganate
- Hydrogen Peroxide
- Molar Solutions of EDTA
- Testing Urine SG
- Sweeteners
- Sodium Hydroxide
Setting up your custom method on your Density Meter is as simple as filling out a few screens.
Oscillating U-Tube with Viscosity Correction and Reference Oscillator
The DDM 2911 Plus’s oscillating U-tube with full range viscosity correction and reference oscillator allows long term calibration stability and measurement at all temperatures with a single calibration. VideoView provides superior high resolution visual bubble detection within your samples with live on-screen video viewing. Full view of the U-Tube makes the DDM 2911 Plus and ideal chemical or petroleum density meter. The video clarity, magnification, and 10X resolution mean no more straining to see small difficult-to-detect air bubbles if present in your sample.
Full 21CFR Part 11 Instrument Level Compliance
The DDM 2911 Plus’s 21CFR Part 11 software module is easily enabled through the user friendly touch screen. This module gives you full compliance with:
- Electronic signature
- Access levels
- Internal write protected storage
- Unique passwords
- Write protected documents sent directly to server
cGMP/GLP Calibration
- Calibrate the DDM 2911 Plus with 2 or 3 traceable standards. calibrating with merely air and water appears inconsistent with cGMP/GLP compliance regulations. (see H&D Fitzgerald’s recommendations at www.density.co.uk)
- Can print out complete method configuration, communication settings, as well as calibration verification and calibration adjustment data/history
- Measured values can be shown continuously as temperature stability is being reached. At the discretion of the user, measured values will only be displayed once the final answer is reached and completely stable
- Unlimited number of customized calibration adjustments and calibration verifications possible
- Complete history of calibration adjustments and verifications are available to view, print, and/or export
- Possible to set calendar reminders as to when calibrations are due
Windows Computer Based Flexibility
- 32 gigabytes of internal memory, almost unlimited capacity for saving measurement data
- The DDM 2911 Plus density meter is network ready and data may also be saved directly to your server or to any directory desired
- Internet access is possible directly from the DDM 2911 Plus’s touch screen
- Disk protection feature protects the operating system against malware infections in networked environments
- Windows based navigation architecture is so intuitive that most operators will never read the manual. But should you wish to reference the manual, it is stored on the DDM 2911 Plus’s internal memory
- Copy methods, transfer concentration tables, download data, etc., via 2 of the 5 total USB ports which are conveniently located on front of unit
- Four total USB ports allow for quick and easy connection to a mouse, keyboard, printer, bar code scanner, or memory stick
Versatile Communication Capability
The standard communication package includes Cat 5 network cable connection, 5 USB ports and 2 RS 232 ports allowing the Density Meter to export measurement results to a thumb drive, C: drive or external PC, LIMS, etc. It can also print measurement results to a local or networked printer or save measurement data direct to your network.
cGMP/GLP Printing
Sample measurement reports are edited quickly and easily. Just import templates from Word or Excel to the DDM 2910 Density Meter and print your company’s customized certificate of analysis directly.
Traceable Density Meter Calibration Standards
Rudolph knows how important it is to calibrate with traceable standards. Therefore, included is either a NIST or UKAS standard in the accessories provided with all density meters.
Standard Accessories
- Quick start guide
- Rinse / sample waste container
- Filling nozzles
- Traceable standards
- IQ/OQ/PQ documentation
- Luer syringes
- Connecting fittings and tubing
Integrated with Laboratory Automation Equipment
- AutoSampler can be loaded with up to 240 samples
- Combine density and specific gravity measurements with simultaneous measurements of refractive index (RI), colour, pH, optical rotation / specific rotation
- Up to three different rinse solvents available for use, fully programmable
- Pressurized and suction sample loading modes available for optimised sample transfer and measurement
- Customer’s unique sample bottles may be used to eliminate the need to transfer samples into special sized test tubes
- Emergency samples measured at any time without stopping the Auto Sampler or moving sample vials
Sample Loading Options
Vertical Load
- Sample loading is done with gravity and bubbles float to the top of the syringe. Suitable for left and right handed operators as opposed to traditional manual horizontal injection. Syringe plunger is easier to push with all samples and there is more control over the syringe than with Horizontal Load
- Gives the ability to apply more pressure to the syringe when injecting viscous samples without harming operators
- When a measurement is complete and the syringe is removed, gravity will force the sample down and into the waste jar. As opposed to the traditional horizontal load, if the waste tubing was bent, the sample would pour backwards and spill out on the table
- Preserves the nozzles and nozzle bodies much better since there will not be added pressure from pushing on them when loading a sample. All the pressure will be on the top plate, thus saving in future maintenance costs
Syringe Injection
Samples can be easily loaded in the DDM series density meter by directly injecting your sample into the inlet port of the DDM. You can watch the sample progress through the U-Tube and monitor for bubbles. When you need a closer look, view at 2X, 6X or 10X magnification. When your measurement is complete, simply flush the U-Tube with your choice of solvent and use the convenient air tube to dry the U-Tube. Ideal for laboratories who make only a few measurements per day or users who wish to use very small amounts of sample as only 1ml of sample is required.
Load Assist
- There are two options for sample loading: by manual injection or having the PeriPump pull the syringe for you
- Ideal for pulling the rinse solutions automatically into the system thus making the rinsing part of the operation much easier
- Back pressure mode available for carbonated samples
- Has no added benefit to measurement performance over the Horizontal Load for an experienced user. However it benefits customers that have multiple. inexperienced users as the PeriPump will automatically inject the sample the same way every time
- No change in instrument’s performance when compared to Horizontal Sample Loading or Vertical Sample Loading options
- Most versatile option as it allows multiple ways to inject the sample: automatically through supplied needle, syringe, hard and flexible tubings
Peristaltic Pump
A peristaltic pump draws the sample into the density meter and could also load a refractometer. The user drops a tube into the sample and starts the peri pump from the DDM display. The peristaltic pump draws the sample through one or two instruments and then measures. The measured sample is displaced to waste by the following sample. Ideal for laboratories working with low viscosity samples such as beverages or users who don’t mind utilizing 50 ml of sample for a measurement. A large amount of sample is needed to ensure all of the previous sample is displaced with the new sample.
Download Literature
Specification
Accuracy: Density, 0.000010 g/cm³, temperature: 0.01 °C
Repeatability (Standard Deviation)*: Density, 0.000002 g/cm³, temperature selectable: 0.001 °C
Resolution (USR)*: Density 0.000001 g/cm³, temperature: 0.001°C
Density Range: 0 g/cm³ to 3 g/cm³ (32° F – 212° F )
Temperature Range: 0°C – 100°C (controlled via Peltier)
Pressure Range: 0 to 10 bar (145 psi)
Viscosity Correction: Over the entire range
U-Tube Video Scanning and Magnification: Three magnified video assisted views of the entire cell are available, in 2x, 6x and a 10x magnifications with video scanning. Images may be saved with results for subsequent review
Automatic Bubble Detection: Automatically warns operator of bubbles
Measurement Modes: Continuous, single and multiple
Measurement Technique: Mechanical oscillating U-Tube method
Minimum Sample Volume: Approximately 1mL (depending on the load option)
Wetted Materials: Borosilicate glass, Teflon (PTFE, ECTFE)
Operating System: Windows embedded write protected software
Measurement Time: Typically 30 to 40 seconds after thermal equilibration
Display: Bright 10.4 inch diagonal TFT type LCD with wide viewing angle, anti-glare flat panel touch screen, 300 nits brightness, 800 x 600 pixels, chemical, scratch and spill resistant monitor, the industry’s largest, most flexible, and customizable user interface
Communication Interface: 5 USB ports, 2 RS232 ports, 2 ethernet ports for network connection, 1 HDMI, keyboard, bar code scanner, mouse, network capabilities
Internal Memory: 32 GB non-removable compact flash allowing storage of over 100,000 measurements
Power Supply: 100 to 240 VAC; 50 to 60 Hz
Power Consumption: 120 Watts at peak
Dimensions: (H) 46cm (L) 28cm (W) 53cm (H)
Weight: 24 kg
* According to ISO 5725 and with USR enabled and under ideal conditions