Density meter: DMA™ 501
There is no such thing as a difficult sample, if you choose the right density meter.
DMA™ 501 is a compact and stand-alone 3-digit density meter. It easily fits into tight spaces in your production area, storage facilities, or in the lab, enabling you to perform quick quality checks just around the corner. Even if the sample characteristics are challenging, the newly designed oscillating U-tube which works according to the patented Pulsed Excitation Method delivers the most stable density results based on comprehensive knowledge of the oscillation characteristics.
You need a density value for pasty, inhomogeneous, sedimenting, particle-containing samples or even aerosol sprays right away? Challenge accepted!
Buy this product online Get in touch Document FinderKey Features
A revolutionary measuring principle
The new design of the measuring cell and a novel way of evaluating the oscillation characteristics lead to stable results, more independent from external factors than ever before.

100 % uptime: Rugged design meets intelligent condition monitoring
- Robust lab density meter with flexible installation site, suitable also for production environments or storage areas
- Ventilation-free temperature control of sample avoids suction of contaminated air or dust into instrument housing and electronics
- Get a warning and recommended action if conditions are not in the ideal range (automatic dew-point detection)
- Splash-proof front & dry air connection for high humidity environments
- Easy instrument operation, even when wearing gloves

Measure density of pastes and creams, inhomogeneous samples, and liquids with particles
- Reliable density measurement also on creams, emulsions, paints and varnishes, scouring agents, and even aerosol sprays
- Automatic full-range viscosity correction of results
- Optional Aerosol Filling Adapter for measurement of Aerosol sprays in liquid phase under pressure
- Optional peristaltic pump for automated filling of low-viscosity samples

Intuitive operation with a familiar smartphone feel
- Brand-new user interface with the look and feel of a smartphone, operated via a 7” touchscreen.
- All results visible at a glance or one value in big font – the screen layout is up to you
- Lab chemists, production employees as well as summer interns will be familiar with easy-to-learn working routines from the start.
- Customizable home screen with quick access to favorite functions
- Integrated conversion tables for simple density and concentration measurement (no manual calculations necessary)

Traceable documentation of density results and incidents
- Storage of 5,000 results
- U-View™ and FillingCheck™: the pin-sharp camera and automatic filling error detection keep records about proper sample filling for subsequent transparency, no matter who performed the measurement.
- Print your measured data or export it to a PC via USB, Ethernet, or RS232.
Technical Specifications
Instrument type | DMA™ 501 | DMA™ 1001 |
Patents granted | AT516420 (B1) | AT516420 (B1) |
Patents pending | AT517486 (A1) | AT517486 (A1) |
Measuring range | Density: 0 g/cm³ to 3 g/cm³ Pressure: 0 bar to 10 bar (0 psi to 145 psi) | Density: 0 g/cm³ to 3 g/cm³ Pressure: 0 bar to 10 bar (0 psi to 145 psi) |
Temperature: 15 °C to 40 °C (59 °F to 104 °F) | Temperature: 15 °C to 60 °C (59 °F to 140 °F) | |
Repeatability, s.d.* | Density: 0.0002 g/cm³ Temperature: 0.1 °C (0.2 °F) | Density: 0.00005 g/cm³ Temperature: 0.02 °C (0.04 °F) |
Reproducibility, s.d.* | Density: 0.0004 g/cm³ | Density: 0.00007 g/cm³ |
Accuracy** | Density: 0.001 g/cm³ Temperature: 0.3 °C (0.6 °F) | Density: 0.0001 g/cm³ Temperature: 0.05 °C (0.09 °F) |
Digital Resolution | Density: 0.0001 g/cm³ Temperature: 0.01 °C (0.01 °F) | Density: 0.00001 g/cm³ Temperature: 0.01 °C (0.01 °F) |
U-View™ | Yes | Yes |
FillingCheck™ | Yes | Yes |
Full-range viscosity correction | Yes | Yes |
Minimum sample volume | Approx. 1 mL | Approx. 1 mL |
Integrated tables and functions | Density, Specific Gravity (SG), alcohol tables, sugar/extract tables, various acid/base tables, API functions | Density, Specific Gravity (SG), alcohol tables, sugar/extract tables, various acid/base tables, API functions |
Wetted parts | Borosilicate glass, PTFE | Borosilicate glass, PTFE |
Dimensions (L x W x H) | 375 mm x 265 mm x 180 mm (14.8 in x 10.4 in x 7.0 in) | 375 mm x 265 mm x 180 mm (14.8 in x 10.4 in x 7.0 in) |
Weight | 13.5 kg (29.8 lb) | 13.5 kg (29.8 lb) |
Power supply | AC 100 to 240 V; 47 to 63 Hz; DC 24V, 3A | AC 100 to 240 V; 47 to 63 Hz; DC 24V, 3A |
Display | 7 inches, TFT WVGA (800 x 480 Px); PCAP touchscreen | 7 inches, TFT WVGA (800 x 480 Px); PCAP touchscreen |
Controls | Touchscreen, optional keyboard, mouse, and bar code reader | Touchscreen, optional keyboard, mouse, and bar code reader |
Communication interfaces | 1 x Ethernet, 3 x USB, 1 x RS232 | 1 x Ethernet, 3 x USB, 1 x RS232 |
Internal storage | 5000 measured results; 400 products | 5000 measured results; 400 products |
Other special functions | Integrated temperature and humidity sensor for intelligent condition monitoring Built-in pressure sensor for adjustments | Integrated temperature and humidity sensor for intelligent condition monitoring Built-in pressure sensor for adjustments Quick one-point water adjustment |
Menu language | English, German, Chinese, Czech, French, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish | English, German, Chinese, Czech, French, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish |
Available options & upgrades | Peristaltic pump Printers Aerosol filling adapter Filling kit for pasty samples ISO calibration | Peristaltic pump Printers Aerosol filling adapter Filling kit for pasty samples ISO calibration |
* according to ISO 5725
** under ideal conditions and for low densities/viscosities
Standards
I
ISO 15212-1IP 365
J
JIS K 0061JIS K 2249
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