Density Meters DDM2909

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Density Meters DDM2909

The Rudolph DDM 2909 Automatic Density Meter features built-in Peltier Temperature Control of the Sample, Full Range Viscosity Correction, Reference Oscillator and VideoViewTM  for easy bubble detection, and is fully GMP/GLP Compliant. With the flexibility of Windows the DDM 2909 is Network ready with Internet connectivity allowing remote access to Rudolph Research Analytical’s Service and Technical Support Team.

The 2909 comes complete with 20 Density to concentration tables which include Brix, Alcohol, API, and many various laboratory reagents. An unlimited number of additional tables, polynomials, and formulas may be added.

Product Description

For unique Density Meter measurement applications, create a sample method using Concentration Tables, Formulas, and Polynomials to match the density measurement methods used in your laboratory. Just a few of the many possible customized sample methods shown below:

  • Baumé of Hydrochloric Acid
  • Normality of Sulfuric Acid
  • Density of Gasses and Aerosols
  • Drug to Propellant Ratio
  • Lead Content
  • ppm Gold in Acid
  • % Toluene in Heptane
  • Fat in Lubricant
  • Mole Fraction of Methanol
  • % HNO3
  • Monomer Solutions
  • Potassium Permanganate
  • Hydrogen Peroxide
  • Molar Solutions of EDTA
  • SG of Urine
  • Sweeteners
  • Sodium Hydroxide


The Rudolph 2909 Automatic Density Meter offers 21CFR Part 11 Instrument Level Compliance

The DDM 2909’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

Density Meter 21 CFR Part 11 Settings


Oscillating U-Tube with Viscosity Correction and Reference Oscillator

The DDM 2909 Density Meter’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.

Computer Windows Based Flexibility

  • 32 gigabytes of internal Compact Flash Memory .
  • The DDM 2909 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 2909’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 right on the DDM 2909’s internal memory
  • Copy methods, transfer concentration tables, download data, etc., via the USB ports.
  • Three USB ports allow for quick and easy connection to a mouse, keyboard, printer, bar code scanner, or memory stick.

Density Meter File Export

Versatile Communication Capability

The DDM 2909’s standard communication package includes:

  • Touch Screen User Interface
  • 3 USB ports (2 Rear, 1 Front)
  • 1 – Ethernet Cat 5 Port
  • 2 RS 232 Ports
  • Keyboard, Bar Code Scanner, Mouse, Network Capabilities, Memory Stick.

Allowing the capability to:

      • Connect Directly to Rudolph Service and Technical Support
      • Connect to any Windows® based Printer via USB or direct to the server via Windows® Print Library
      • Save measurement data locally and directly to your Network/Server.

cGMP/GLP Printing

Sample measurement reports are edited quickly and easily. Just import your logo to the DDM 2909 Density Meter and print your company’s customized “C of A” directly.

Standard Accessories

The DDM 2909 standard accessories include:

    • Quick Start Guide
    • Rinse/Sample Waste Container
    • Filling Nozzles
    • Luer Syringes
    • Connecting Fittings & Tubing
    • Manual

Density Meter DDM 2909 – Specifications

DDM 2909 Density Meter Specifications
Measurement Ranges Density: 0 to 3 g/cm³

Temperature: 15°C to 40°C (controlled via Peltier)

Pressure: 0 to 10 bars

Measurement Modes Continuous, Single, Multiple
Measurement Technique Mechanical Oscillator Method
Accuracy Density: 0.0003 g/cm³ with a single calibration and measurement through multiple temperatures

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

Temperature: 0.05°C

Repeatability Density: 0.0001 g/cm³

Temperature: 0.02°C

Resolution Density: 0.0001 g/cm³

Temperature: 0.01°C

Minimum Sample Volume Less than 1 mL
Wetted Materials Borosilicate glass, Teflon (PTFE, ECTFE)
Operating System Embedded Windows; embedded software safe from malware and viruses
Display 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 and scratch resistant monitor, the industry’s largest and most flexible interface
Communication Interface Touch Screen User Interface

3 – USB Ports (2 Rear – 1 Front)

2 – RS232 Ports

Ethernet Port for Network Connection, Keyboard, Bar Code Scanner, Mouse, Network Capabilities

Video Scanning & Magnification Video assisted, capable of approximately 10X magnification.
Internal Memory 32GB Non-removable Compact Flash
Operating Dimentions 18.00″ (L)  11.00″ (W)  21.00″ (H)

46cm (L)  28cm (W)  53cm (H)

Shipping Weight 46 lbs. (22 Kg)
Power Supply 85 to 260 VAC; 48 to 62 Hz
Power Consumption 150 – 200 Watts


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