DDJ-0.01 stainless steel conductivity electrode sensor 0.01cm-1 | Инструменты

DDJ-0.01 stainless steel conductivity electrode sensor 0.01cm-1 | Инструменты

On-line conductivity electrode

DDJ-0.01,0.1, 1, 10, 30, fiveA conductive electrode is a device specially designed for analysis of water conductivity using a dedicated on-line industrial ion chromatography. The electrode is composed of the inner electrode and the outer electrode and the temperature probe and the electrode cup and the top cover, terminal; inner electrode and the outer electrode is an annular outer electrode, electrode set, and separated by insulating material; the inner electrode end is closed, the outer electrode is provided with a hole, so that the water from flowing through the internal electrode gap and between the electrodes; temperature probe inside electrode; inner electrode and the outer electrode arranged on the electrode cup, fixed on the top end, the electrode cup is provided with a water inlet pipe and a water outlet pipe; the top cover is installed on the electrode cup; terminal installed at the upper end cover; an inner electrode and an outer electrode is respectively connected with the terminal the inner and outer electrodes connected; the gap between 1-2 mm. The conductance electrode uses the gap between two concentric electrodes to measure the conductivity of water, and the gap between the two electrodes is controlledWithin the range of 1-2 millimeters.

Basic principles of electrode selectionAccording to the size and range of the conductivity of the tested water sample, the suitable constant electrode is selected according to the table below.The most common error in selecting electrodes is "choosing electrodes with large constants to measure low conductance"". If you choose1.0Electrode measurement<3MuS/cmFor water samples, it is impossible to obtain accurate values. Because the conductivity of the low conductivity medium is very poor, if it is measured with a large constant electrode, only weaker and unstable electrical signals will be obtained, and the measurement error will be greatly increased.

K=0.1Compression type electrode Pipeline typeThreadelectrodeK=0.01Screw type electrode Pinch and pull type electrodePolysulfone K=10/30

technical parameter

The error will increase when measurements are carried out beyond the measurement range shown in the preceding table. When dielectric conductivity value>100MuS/cmWhen the constant is 1 or 10 platinum black electrode is measured to increase the effective area, the electrode surface current density is decreased significantly, so as to effectively weaken the electrode polarization effect which is easy to produce when the medium is concentrated solution.

The electrode constant in the instrument must be consistent with the constant on the electrode.If the electrode constant is marked 0.102, the electrode constant in the instrument must be 0.102.

Electrode installation

Electrodes usually have four mounting ways: flow type, sunk type, pipe type, and flange type.

A,The electrodes are installed in circulation,Suitable for hard and soft pipe connection waterway. The outer diameter of the water inlet pipe is 6, Phi 8, Phi 10 and phi 12, which meet the needs of different users of the four specifications. Generally available with phi 10.

Two,The electrode lead is worn out through the protecting sleeve, and the thread at the top of the electrode is connected with the protecting sleeve.

Three,The electrode is piped to connect the thread at the front of the electrode to the pipe(optional welding head).With 3/4 thread welding head welding on the pipe, then the electrode in the welding head, and if necessary, in the electrode thread with some raw tape, to prevent water overflow.

Note: screw on the pipe, you must first screw the electrode, but to take the cable and electrode in the same direction, in order to prevent the individual to wring the electrode, the cable will be twisted. When you want to check down, you should first remove the cable from the instrument, then screw the electrode. This is to prevent the wires from being twisted at the ends of the electrodes and cables.

Four, the electrode hair type installation, according to customer requirements, such as DN80, DN100 and so on.

Note: in general, according toCirculating installation configuration.

Electrode description

OneThe conductivity cell should be cleaned in time. With warm detergent (50% nitric acid solution immersion cleaning dirt adhesion of adhesive available 2% hydrochloric acid or 5%), with a nylon scrub brush, the inside and outside surface with distilled water repeatedly washing clean the electrode with the hand touch electrode, remember.

TwoThe lead of the electrode and the connecting plug at the back of the two meter shall not be wet, otherwise it will be inaccurate.

ThreeHigh purity water shall be measured rapidly after being packed into containers. Because of the CO in the air2Will continue to generate strong conductive solution of carbonate ion in water sample, the conductivity will continue to rise, the measured data are not allowed.

FourThe containers to be tested must be clean and must not be contaminated by ions.

FiveIncorrect use of electrodes often results in abnormal operation of the instrument. When the electrode is mounted, the electrode should be completely immersed in the solution.

SixFor other special requirements, please specify.