pH and redox electrodes with robust plastic stem and protection basket

June 2004 Analytical Instrumentation & Environmental Monitoring

Jumo, Germany, has developed a new series of electrodes for applications such as freshwater and seawater aquariums, processing of drinking and bathing water, fisheries and hatcheries, and for use with portable measuring equipment.

The electrodes feature a robust, acid- and alkali-resistant plastic stem made from polypropylene oxide (PPO). The polyolefine diaphragm is insensitive to the medium, and the proven Jumo-gel offers fast, stable measurements.

The electrodes can be used over a temperature range from 0 to 80°C, and are pressure-resistant up to 600 kPa. The membrane glass that is used enables continuous measurement throughout the range pH 0 to 12 and short-term measurement up to pH 14. The tough platinum tip of the redox combination electrode can be used for measurements over the range ±2000 mV.

Both types of electrode (pH and redox versions) can be supplied, according to the application, with a smooth N cap connection (S7), an N screw-cap connection Pg13.5 (S8) or as a fixed-cable version with a pre-assembled instrument connector to DIN 19 262 or a BNC connector.

The versions with a BNC connector can, for example, be directly connected to swimming pool and aquarium computers from various manufacturers. Jumo is part of Randburg-based ASSTech Process Electronics & Instrumentation's range.

For more information contact Anastas Schnippenkotter, ASSTech Process Electronics & Instrumentation, 011 794 7057, [email protected]

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