Density measurement of sulfuric acid (H₂SO₄) in lead-acid batteries

The density of sulfuric acid in lead-acid batteries reflects the state of charge and quality, but inaccurate checks risk battery failures and costly downtime. The DMA 35 Ampere delivers fast, precise, and safe on-site density measurement, ensuring reliability, safety, and long service life.

Lead-acid batteries remain one of the most widely used energy storage systems, powering applications from automotive starter batteries to backup systems for industrial and renewable energy installations. A key component of these batteries is sulfuric acid (H₂SO₄), which serves as the electrolyte and enables the electrochemical reactions between the electrodes.
The density of sulfuric acid directly reflects its concentration, which in turn indicates the state of charge of the battery. This makes density measurement essential to ensure correct electrolyte filling during production and to monitor the charging and discharging process as well as to detect faulty or aged cells during maintenance.


The DMA 35 Ampere portable density meter by Anton Paar enables regular density checks on battery cells directly at their storage location in just a few seconds.

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