IST International Surface Technology

, Volume 6, Issue 1, pp 46–46 | Cite as

Portable pH Meter

Measuring and Testing
The new PH M 230 pH meter from Dostmann electronic GmbH measures the pH value, the reduction potential and the temperature in different media. Special pH electrodes extend the application of the meter to non-liquid foods. The meter offers a wide variety of application possibilities. It has a data logger for automatic recording of the measured values. The mains adapter reduces the costs of the power supply in stationary laboratory operation. The PH M 230 measures the temperature and, if an external pH electrode is connected, it also measures the pH value as well as the reduction potential when a redox probe is connected. The measuring range of the pH value is from 0.00 to 14.00, for temperature from 0.0 to 60.0 °C and for the reduction potential from −1999 to +1999 mV. The measuring interval can be freely selected between 1 second and almost 9 hours. The pH value is shown on a large two-line LC display with a resolution of 0.01 pH units and the temperature is displayed with a resolution of 0.1 °C. The Min/Max function records the minimum and maximum values while the Hold function makes reading the measured value more convenient. The date and time can also be archived to provide comprehensive documentation. Data can be exported via an SD card (not included), which can be inserted into the card reader of a PC or laptop computer. The values can then be directly recalled and processed in Excel.

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© Springer Fachmedien Wiesbaden 2013

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