COMBINATION pH ELECTRODES EPX-4B / EPX-4UB

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The combination glass electrodes EPX-4B and EPX-4UB are used for continuous pH measurements in containers or tanks with liquids after placing them in the immersion heads: GXZ-1t, GXZ-2t and GXZ-3t which cooperate with controllers for continuous measurements. They may also be used with the GXZ-3tk head cooperating with portable multifunction meters. Special connector and M16 thread placed in the upper part of the electrode enables to screw it into the measuring head.

Teflon junction limits penetration of the measured solution into the electrode and enables good contact with the measured sample what results in accurate and stable measurements and limits the penetration of the measured solution inside the electrode. The measuring membrane is a round glass bulb made of glass chosen depending on the intended use.

The EPX-4B model is designed for measurements in liquids containing strong acids or alkalis (apart from hydrofluoric acid or NaOH and KOH).

The EPX-4UB model may be used for measurements in deionised, pure and ultra pure water.

The reference half cell is separated by an internal electrolytical diaphragm, what creates the ionic barrier. It prevents the silver ions from diffusion to the reference half cell, what in turn limits the chance of clogging of the ceramic diaphragm and interference of the sulphide and cyanide ions from the measured solution. It also limits the interference of the reducing agents such as amines, buffers containing TRIS, sulfites, etc.
In case of using the electrode with controllers of 801 or 804 series it is necessary to use a preamplifier. In case of using CP-421 pH meter the preamplifier is necessary only if a distance between the head and the meter is greater than 10 meters.
The electrodes may work in liquids with temperature up to 90°C.
The gel electrolyte is not refillable.