The combined sensor PHEHT is based on a principle of measure of difference of potential between a reference electrode (Ag/AgCl) and an electrode of measure (Special pH glass for the measure of pH,and a ring of platinum for the ORP measurement).
The returned measure is given for a temperature of 25 °.
The PHEH sensor has been designed to perform lakes and rivers, seawater with conductivities of 55 mS/cm and to wastewater with conductivity higher than 200 mS/cm.This sensor features a “long life” reference. The Plastogel® PONSEL technology increase the lifetime of the probe the need to refill.
This sensor has been designed also for handheld and in situ applications which have been the most difficult situations for a pH/ORP sensor in term of sensor resistance, quick time response, minimal flow dependence and low power consumption.
The sensor features excellent interference immunity thanks to the integrated preamplifier and digital signal processing. The measured value for pH is automatically compensated with the temperature, and transferred without interference to the connected display unit and controller via a digital interface. The cartridge is easy to replace, meaning the sensor is very easy to maintain. The current calibration data is saved directly in the sensor electronics. As a result, the Plug and Play function of the system is enabled without the need for recalibration. The sensor also includes a logbook containing the last ten successful calibrations in the form of a ring buffer
The compact and robust sensor is particularly well suited to the following typical areas of application: • Industrial and municipal sewage treatment plants • Wastewater management (nitrification and de-nitrification) • Surface water monitoring • Drinking water monitoring
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