Laboratory Accuracy Everywhere You Need to Measure
Unmatched Capabilities in a Fully Portable, Handheld Density Meter
Temperature Controlled Measurements at 20° and 25°C
The problem with most portable Density Meters is they drift because they do not control temperature. All Density Meter measurements are highly sensitive to temperature and mathematically correcting for temperature may not be good enough for some applications. Only temperature control will result in the accuracy many users require.
The Rudolph DDM 29 Handheld Density Meter utilizes powerful and compact Peltier technology. Control of the sample temperature for precise heating and cooling to ensure stable and accurate measurements at either 20 or 25°C.
Rugged Stainless Steel Double U-Tube for unmatched accuracy, durability, and weight reduction
The Rudolph DDM29 portable density meter uses a 316 Stainless Steel, Double U-Tube instead of a simple glass U-Tube. This new design is durable and corrosion resistant. Stainless Steel is preferable for customers who are tired of replacing glass U-Tubes in other handheld brands.
The Double U-Tube design allows for handheld accuracy and rapid measurement speed. Demonstrating 3 decimal place measurement readings in 30 seconds, and 4 decimal measurements in 60 seconds.
User friendly GUI and Bright, Back Lit,Touch Screen Display
Extremely easy to use Graphic User Interface (GUI) and the availability of 10 different Languages on a brightly lit 7 inch(128mm) touch screen makes this the most User Friendly Density Meter in the market today. The interface is a bright LED touchscreen, with a large easy to navigate GUI. No more difficulties reading measurements in bright or dark environments.
Portability and Flexibility
The DDM29 gives you true portability. Powered by a fast-charging Lithium-Ion battery, it’s ready wherever you need it—receiving docks, terminals, pipelines, cargo ships, or the production floor. Each battery fully charges in about 2 hours and provides 2–4 hours of operation, depending on usage level.
For nonstop performance, the DDM29 includes a charging station and two batteries, so you can keep one in use while the other charges ensuring continuous, hassle-free operation.
Laboratory Accuracy – Everywhere You Need to Measure
Most Portable Handheld Density Meters use temperature correction and publish 2 or 3 digit accuracy which is very prone to drift. The DDM29 uses Peltier Temperature Control, which eliminates drift and provides accuracy to the 4th decimal place. Laboratory accuracy in the DDM29 reduces testing of materials in the main Lab. Testing can now be done accurately in the receiving dock, formulations area, or where ever measurements are needed
The DDM29 is compliant with the following methods:
ASTM D7777 Standard Test Method for Density, Relative Density, or API Gravity of Liquid Petroleum by Portable Digital Density Meter
ISO 15212-1:1998 Oscillation-type density meters. Part 1: Laboratory instruments
IP 559 Determination of density of middle distillate fuels – Handheld oscillating U-tube density meter method.
Rudolph is a long time participant in ASTM Petroleum Testing, Proficiency Testing Programs.
Portable Density Meter with Flexible Method Management
Factory installed measurement methods cover a wide group of industries and applications. The DDM29 is factory configured with over 50 density and concentration tables, such as Brix, %Alcohol, API, and most common chemicals. Additional tables, polynomials, and formulas may be added.
Other Applications
- Essential Oils
- Chemicals
- Beer, wort, and fermentation monitoring
- Raw material soft drink monitoring
- Monomers, Polymers and Elastometers
- Pharmaceutical raw materials and finished products
- Wort, juice, fermentation, spirits safe monitoring
- Blending, bottling, spirits and liquors packaging
- Sulfuric Acid in lead-acid batteries
- Adhesives, glues
A measurement method is created exactly for unique measurement applications. You may use Concentration Tables, Formulas and Polynomials to match the measurement methods used in your laboratory or field application.
Industry Applications For Handheld Density Meters
Technical Specifications
DDM29 Portable Density Meter
| Precisão | Density: 0.0005 g/cm3* | Temperature: ±0.1°C |
| Repeatability (Standard Deviation) | Density: 0.0001 g/cm3 Temperature: 0.02 °C |
| Resolução | Density: 0.0001 g/cm3 Temperature: 0.01°C |
| Temperature Selectable | 20 or 25 °C ±0.01°C |
| Temperature Control (Controlled via Peltier) | 20 or 25°C |
| Ambient Temperature | -10 to + 55°C |
| % Concentration Scales | Over 30 concentration Scales |
| Ambient Temperature Limit | 0 to 40°C |
| Faixa de pressão | 0 a 10 bar (145 psi) |
| Modos de medição | Contínuo, único, múltiplo |
| Técnica de medição | Mechanical Oscillating Double U-Tube Method |
| Faixa de medição | Density: 0-3g / cm3 |
| Volume mínimo de amostra | Approx 1mL |
| Materiais úmidos | 316 Stainless steel, Teflon PTFE, ECTFE, PVDF |
| Supported scales | Density, Specific Gravity, Alcohol Tables, Sugar/Extract, API functions, concentration tables, acids, bases, organic and inorganic chemicals |
| Sistema operacional | Android OS |
| Tempo de medição | Typically 30 – 40 seconds after thermal equilibration |
| Tela | Bright LED – 7” touch screen. |
| Communication Interfaces | USB-C, WiFi,Manual Entry, RFID, and Barcode for entering sample IDs are all Standard |
| Printing | Wireless Printing Via Airprint |
| Suporte remoto | Troubleshooting, Diagnostics Tools, Software Updates available via the Internet |
| Memória interna | Up to 6,000 Measurements |
| Dimensões operacionais | 7.25” (L) x 4.75” (W) x 13.50” (H) 18.50 cm (L) x 12.25 cm (W) x 34.50 cm (H) |
| Dimensões da remessa | 18” (L) x 18” (W) x 12” (H) |
| Peso operacional | 3.5 lbs |
| Charging /Power Consumption | Battery Longevity | 2-4 Hours depending on usage level |
| Included with Instrument | Charging station, syringes, instructions |
| Protection Class | IP54 |
| Country of Manufacture and Design / Warranty | 1 Year Domestic and international warranty |
