Sensorex Introduces pH Sensor Electrodes for Commercial Applications

Published on July 4, 2012 at 6:12 AM

By Kalwinder Kaur

Sensorex, a provider of sensor technologies and systems for water applications, has introduced new “Calomel Free” pH and Reference Electrodes without mercury. The environmentally friendly electrodes are suitable for laboratory, commercial and industrial applications.

Sensorex “Calomel Free” pH and Reference Electrodes

The electrodes have an Ag/AgCl-based double junction reference that has a special silver ion trap. This trap helps prevent any contamination that may occur with the sample that may be sensitive to silver. Further, the reference output can provide the same output as delivered by Calomel electrodes that use silver chloride for reference, through adjustment.

Sensorex is offering the Calomel Free pH electrodes in two types of bodies - chemically resistant thermoplastic that is unbreakable, and in a glass body. The electrodes are offered in sealed and refillable models. The sealed models are filled with gel and are maintenance-free, while refillable reference electrolyte can be used to increase the life of the refillable design models. The electrodes are also offered in combination models that contain a reference cell and a pH measuring cell within a single body. Sensorex is providing the electrodes in various diameters and lengths.

The electrodes can be interchanged with most meters. They possess a pH range of 0-14 (Na+ error >12.3 pH) and a temperature range of 0°C - 60°C. They have a response speed greater than 95% in 1 second. The Sensorex “Calomel Free” pH electrodes have an isopotential point of pH 7.00 (0 mV) with a 97% or higher span and ±0.20 pH offset.