Portable density meter: DMA 35

On-site density and concentration measurements in just a few seconds

Take DMA 35 with you at all times and measure the density and concentration of your sample directly on-site – be it for intake control, at-line quality inspections, or on the road. The portable density meter uses only two milliliters of sample and saves you a lot of time as there is no need to transport the sample to the lab. DMA 35 is built to withstand the knocks and spills of outdoor use. An RFID interface for quick sample identification and a Bluetooth® interface for convenient data handling in the field are integral parts of the instrument. DMA 35 Ex and DMA 35 Ex Petrol are both intrinsically safe and specially designed for the measurement of flammable chemicals (DMA 35 Ex) or petroleum samples (DMA 35 Ex Petrol) in hazardous environments.

DMA 35 Ampere is the ideal solution for measuring the specific gravity of sulfuric acid in lead-acid batteries during production and for maintenance purposes.

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Key features

A portable density meter providing accurate results, also under harsh conditions

The splash-proof DMA 35 is made for density and concentration measurement in harsh environments, including outdoor operation, while providing the accuracy expected from a lab instrument. The smart oscillator placement makes sure that gas bubbles move to where they can’t affect your result: outside the measuring cell.

Designed for on-site density measurements

Designed for on-site density measurements

  • Leak-proof sealed housing to withstand rough conditions in industrial and field applications
  • Additional rubber protection keeps the measuring cell safe
  • Strong hard-glass front for a long working life
  • Operated via capacitive keys with a sensitivity suitable for use with or without gloves
  • Suitable for both left- and right-handed users
  • Read RFID tags and start or abort measurements via gesture control: one hand is free to hold you steady when measuring hard-to-reach samples.
  • For sample temperatures of up to 100 °C, supporting quick decisions, e.g. in the beer brewing process (measurement on hot wort)
  • Smart patented oscillator connection (AT516421 B1) enables replacement in case of cell rupture
Intrinsically safe – for use in hazardous locations

Intrinsically safe – for use in hazardous locations

  • Intrinsically safe models DMA 35 Ex and DMA 35 Ex Petrol (Ex marking [Ex] II 2 G Ex ib IIC T4) for use in hazardous areas
  • The only option available on the market for safe measurements in explosive atmospheres
  • DMA 35 Ex is particularly suitable for measuring flammable chemicals.
  • DMA 35 Ex Petrol is equipped with a special housing which provides excellent resistance to petroleum samples.
  • DMA 35 Ex Petrol fully complies with the IP 559 and ASTM D7777 standards.
Fastest filling and measurement – for a huge variety of samples

Fastest filling and measurement – for a huge variety of samples

  • Fill all kinds of samples – no matter what the viscosity is – in one second using the built-in manual pump or a syringe.
  • DMA 35 can also be used as a mini benchtop instrument; simply turn it upside down, put it on a table, and fill the sample up with a syringe.
  • No expensive electrical wearing parts: you can easily do all cleaning and maintenance work yourself.
  • Measuring cell with inspection window and backlight for convenient inspection of proper sample filling
  • The most reliable portable density meter for fermenting beer or wine, due to intelligent oscillator placement (potential bubbles automatically move outside the measuring cell)
  • Lock-position of pump preventing sample carryover
  • Auto-rotating display for perfect visibility of results at any instrument position
  • Influence of viscosity on your density result is automatically corrected: for reliable measurements, also on highly viscous samples
Perfect traceability of density and concentration results

Perfect traceability of density and concentration results

  • Storage of up to 250 sample IDs for easy sample identification
  • RFID interface for changing measurement settings quickly by reading RFID tags
  • Identify immediately if your products are out of spec: DMA 35 gives a color-coded warning if the measured sample is outside your accepted tolerance range.
  • Storage of up to 1024 measurement results including time stamp and sample ID
  • Wireless data exchange with a PC (csv or txt format) and data export to a printer via Bluetooth® for convenient data handling in the field – no extra software required
  • Easy data management using optional license-free AP-SoftPrint program
Leave your glass hydrometer or pycnometer for a digital density meter

Leave your glass hydrometer or pycnometer for a digital density meter

  • Measurement directly at the sample container
  • Requires only 2 mL of sample, filled via the built-in pump
  • Preinstalled and programmable concentration units – no further calculations are necessary
  • Each unit covers the whole relevant measuring range.
  • Results available in seconds
  • Perfect traceability of results
  • Intuitive user interface without the need for any explanation

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Quickly determining the state of charge of lead-acid batteries

Quickly determining the state of charge of lead-acid batteries

  • Determination of the specific gravity of sulfuric acid
  • Used for measurement of sulfuric acid in lead-acid battery production and maintenance of uninterruptible power supply (UPS) systems
  • Protection class IP54 and high chemical resistance for use in harsh environments

Technical specifications

Patents granted Smart connection of measuring cell: Patent AT516421 (B1), EP3015847 (B1)
Other special functions Viscosity correction for reliable measurements, also on highly viscous samples
Gesture control for easy one-handed measurements
Identification of results outside your specified limits
Measuring range Density: 0 g/cm³ to 3 g/cm³
Temperature: 0 °C to 40 °C (32 °F to 104 °F)*
Accuracy Density: 0.001 g/cm³ **
Temperature: 0.2 °C (0.4 °F)
Repeatability, s.d.*** Density: 0.0005 g/cm³ **
Temperature: 0.1 °C (0.2 °F)
Reproducibility, s.d.*** Density: 0.0007 g/cm³
Digital Resolution Density: 0.0001 g/cm³
Temperature: 0.1 °C (0.1 °F)
Ambient temperature****              Standard Version, Ampere Version: -10 °C to +50 °C (14 °F to 122 °F)
Ex and Ex Petrol version: -10 °C to +40 °C (14 °F to 104 °F)
Supported measuring units  
  • Specific gravity
  • Alcohol tables
  • Sugar/extract tables
  • API functions
  • H 2SO 4 tables
  • Ten programmable custom-specific measuring units
Sample volume 2 mL
Dimensions (L x W x H) 245 mm x 103 mm x 126 mm
Data memory 1024 measured results, 30 measuring methods, 250 sample IDs
Power supply Three 1.5 V LR06 AA alkaline batteries
Weight 660 g
Interfaces Bluetooth®, RFID (both included by default)
Protection class IP54 
(first digit: 5 – protection against dust ingress; second digit: 4 – protection against splash water from any direction)
Intrinsic safety of Ex and Ex Petrol version Ex  II 2 G Ex iB IIC T4
Scope of supply Portable density meter, filling tube, adapter for syringe filling, syringes, transportation case, rubber protection for measuring cell, three batteries, Allen key, instructions
Menu language English, German, Chinese, Japanese, French, Russian, Italian, Portuguese, Turkish
Available options             

Elongated filling tube 
Portable thermal printer with Bluetooth® interface 
Bluetooth® USB adapter 
Carrying strap 
ISO calibration

* Measurements up to 100 °C possible 
** Viscosity <300 mPa•s, density <2 g/cm³ 
*** according to ISO 5725 
**** Sample must not freeze within the measuring cell; Ex and Ex Petrol version: -10 °C to +40 °C (14 °F to 104 °F)

DMA is a registered trademark of Anton Paar (EM 013414867)



ASTM D7777


Energy Institute IP 559


ISO 15212-1

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The Anton Paar quality in service and support:
  • More than 350 manufacturer-certified technical experts worldwide
  • Qualified support in your local language
  • Protection for your investment throughout its lifecycle
  • 3-year warranty
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