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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. The portable density meter uses only two milliliters of sample. In addition, it 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. If the measuring cell nevertheless suffers from cell rupture, you benefit from the unique patented connection of the measuring cell, which allows replacement. An RFID interface for quick sample identification and a Bluetooth® interface for convenient data handling in the field are integral parts of the instrument. To top it all off, DMA 35 can also be used as a mini benchtop instrument: Turn it upside down, put it on a table and fill the sample with a syringe.

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.

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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.

Unbeaten usability – for fast measuring routines

Unbeaten usability – for fast measuring routines

  • Fill all kinds of samples – no matter what the viscosity is – in one second using the built-in pump or a syringe.
  • No expensive electrical wearing parts: you can easily do all cleaning and maintenance work yourself.
  • Intuitive user interface without the need for any explanation
  • Operated via capacitive keys with a sensitivity suitable for use with or without gloves
  • Suitable for both left- and right-handed users
  • For sample temperatures of up to 100 °C, supporting quick decisions, e.g. in the beer brewing process (measurement on hot wort)
  • Measuring cell with inspection window and backlight for convenient inspection of proper sample filling
  • No-hassle measurement of hard-to-reach samples
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
  • 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.
  • 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
  • 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.
Smart oscillator design and position

Smart oscillator design and position

  • Smart patented oscillator connection (AT516421 B1) enables replacement in case of cell rupture
  • The most reliable portable density meter for fermenting samples (e.g. beer and wine production) you can get, due to intelligent oscillator placement
  • The oscillator is placed in the optimal angle to avoid the influence of potential gas bubbles on the result (bubbles automatically move outside the measuring cell).
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 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 and data export to a printer via Bluetooth® for convenient data handling in the field
  • Easy data management using license-free AP-SoftPrint program
Quick and reliable measurement of viscous samples

Quick and reliable measurement of viscous samples

  • Stable tabletop position for filling samples via syringe
  • 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
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

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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
Resolution Density: 0.0001 g/cm³
Temperature: 0.1 °C (0.1 °F)
Ambient temperature**** -10 °C to +50 °C (14 °F to 122 °F)
Supported measuring units
  • Specific gravity
  • Alcohol tables
  • Sugar/extract tables
  • API functions
  • H2SO4 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 suitcase, rubber protection for measuring cell, three batteries, Allen key, instructions
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

Application Reports

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