Hanna HI-763100 Digital EC/Temperature Electrode

The HI 763100 is a digital conductivity electrode with a built-in temperature sensor. Compared to the amperometric design of other conductivity probes, the HI 763100 is a potentiometric probe with platinum sensors which allows for the possibility to measure high or low conductivity ranges using one probe. This electrode features an integrated microchip that stores calibration data, electrode type, and serial number. This probe features a 3.5 mm connector designed exclusively to be used with Hanna Instruments edge® Tablet Meters.

The built-in microchip stores sensor type, serial number, and calibration information including date, time, offset, slope, probe condition and buffers used. This information is automatically retrieved by edge® once the electrode is plugged in. The ability to transfer information allows for hot-swapping of probes without having to recalibrate. All pH measurements are performed within the electrode and transferred digitally to the meter. This overcomes any noise issues associated with the traditional high impedance analog measuring system. Electrical noise can be generated from a built-in temperature sensor and while working in a humid environment.

The probe is surrounded by a chemically resistant plastic sleeve to maintain control of external interferences from the sample. It also allows the current loop to be generated in a controlled area.

Since temperature is an important factor for measuring conductivity, a built-in temperature sensor on the probe is very helpful. There is no need for an external temperature probe so that measurements can be made easily. The coefficient used to correct for changes in temperature is β, which is expressed as a percentage of reading per degree of Celsius.