CS236404B1 - Case for ion selective electrodes - Google Patents

Abstract

A housing for ion-selective electrodes with a plastic membrane, enabling easy replacement of the sensor, as well as replacement of the reference electrolyte and membrane, in a simple procedure without complex disassembly, which is achieved by the fact that it consists of the body of the electrode housing and the core (2) of the replaceable sensor, containing the reference system (6), covered by a membrane cap (5) with a sealed membrane (4), mutually connected by a detachable threaded connection.

Description

The invention relates to a housing for ion-selective electrodes with a plastic membrane.

Generally, ion selective electrodes with pleated non-gate find a lower lifetime than solid-state electrodes. Increasing the life of these electrodes with plastic non-gate is solved by some manufacturers by supplying replaceable sensors to the electrode. Replacement sensors are known in which the entire reference system is incorporated therein, i.e. a solution and a reference electrode, on the bottom of which the active membrane itself is glued. The disadvantage of this solution from the manufacturer's point of view is that after sticking, for example, an unsuitable membrane, it cannot be replaced and the sensor can be used for a new membrane. Another solution is that the replaceable sensor is in the form of a tube with an active membrane adhered to the lower edge, without a reference system. From the lower part of the electrode body is led the reference argentichloride electrode and the sensor must be filled with the reference electrolyte each time it is replaced. The disadvantage is the possibility of damaging the exposed Argentine Chloride electrode either during transport or handling, and from the manufacturer's point of view, the impossibility of replacing the unsuitable membrane.

These disadvantages are overcome by the ion-selective electrode-filled membrane housing according to the invention, which consists of a housing body and a core of a replaceable sensor with a reference system, covered by a membrane cap with a sealed membrane, connected to each other by detachable threaded connections.

- z23B 404

The advantage of the housing according to the invention is that the sensor is easy to replace by simply screwing on a new one and, from the manufacturer's point of view, replacing the reference electrolyte and the active membrane by using a sensor for the new membrane.

In the following, with reference to the attached schematic drawing in vertical section, the housing according to the invention is described in more detail as one particular embodiment.

The figure shows the plastic housing χ housing, replaceable sensor core 2 and reference system 6, diaphragm cap ^{3 with} diaphragm 4, sealed with gasket 2. between the end of the χ housing body and the membrane cap 2 ·

The core 2 is provided with an outer and an end of the housing body X and a membrane cap 2 with an internal fitting.

When replacing the sensor, the whole complex 2 is unscrewed with the membrane cap 2 * by the reference system 6 and the membrane 4. When replacing either the reference solution ₍ or the membrane, the membrane cap 2 is unscrewed) ·

The housing according to the invention thus allows the user to easily and easily replace the replacement sensor without any risk of damaging either the reference system or the membrane, and the manufacturers to easily replace either the reference solution or the membrane without complicated removal procedures.

Claims (1)

Housing for an ion-selective electrode with a diaphragm, characterized in that it comprises a housing body (1) and a core (2) of a replaceable sensor with a reference system (6) covered by a membrane cap (3) with a sealed diaphragm (4) threaded joint.