How to choose PH sensors and their electrodes in different environments
PH is one of the important testing indicators of water quality. In the field of sewage treatment, industrial production, environmental monitoring, education and scientific research, aquaculture, civil water and other areas need to carry out PH testing.
At present, the common PH detection method on the market is to use PH sensors, PH sensors are used to detect the concentration of hydrogen ions in the measured solution and converted into the corresponding available output signal sensor, this way to obtain accurate PH parameters.
So how to choose the PH sensor?
1,Does it need automatic temperature compensation (ATC)?
pH measurement depends on temperature. If an extreme and variable temperature range is required during the measurement process, the pH measurement will most likely require temperature compensation. When determining whether automatic temperature compensation (ATC) is required, the desired pH accuracy, process temperature range and pH measurement range should be considered.
2. Is the pH sensor compatible with the instrument you need to use?
Before choosing a pH sensor, you need to know whether the industrial pH sensor can be connected to the instrument you want to use (eg: controller, transmitter, analyser, etc.).
JD Renke industrial pH sensor (RS-PH-*-2-*) adopts high-precision probe, accurate and stable measurement, the measurement range is 0~14.00pH, using two-point calibration method, small error, higher accuracy. With automatic temperature compensation function, automatic temperature compensation and manual temperature compensation can be switched at will, the sensor can work within 0~60℃, relative humidity 0~85%, the electrode is applicable to temperature 0~80℃. Optional digital display meter controller.
Compared with the traditional PH measurement method, the operation is simple, the data is accurate and fast, but also through the connection of environmental monitoring host will be collected by the signal uploaded to the environmental monitoring cloud platform provided by our company free of charge, support for computer web site, mobile phone APP and WeChat public number a variety of ways to log in, anytime and anywhere to view the data.
When choosing a pH sensor, in addition to understanding the functional characteristics of the sensor, you also need to understand the environmental conditions in the use of the process.
For different use environments, JD Renco industrial pH sensors are equipped with six different electrodes for selection, namely, conventional composite electrode, planar electrode, and flat electrode.
They are conventional composite electrode, plane desulfurisation electrode, tetrafluoro electrode electrode, electroplating electrode, glass electrode, antimony electrode.
1,Conventional composite electrode
Scope of application: non-corrosive weak acid and alkali environment of industrial sewage, domestic sewage, agriculture, aquaculture industry and other scenes.
2,Plane desulphurisation electrode
The electrode is special PH electrode for slurry and desulphurisation, because it is flat so it is not easy to scale and easy to clean. So it is the most suitable choice of electrode for desulphurisation occasions.
Scope of application: used in various industrial wastewater, environmental protection water treatment, mineral suspension, PH measurement in flue gas desulphurisation.
3,Tetrafluoro electrode
The electrode shell material is PTFE, suitable for strong acid, alkali, organic corrosion occasions.
Scope of application: industry, sewage containing organic matter, online monitoring.
4,Electroplating electrode
Adopting double-liquid junction, reducing the pollution of reference liquid, long-distance reference diffusion path, greatly extending the service life of the electrode in harsh environments, easy maintenance.
Scope of application: sewage treatment, electroplating sewage fermentation, high organic content occasions.
5,Glass Electrode
The electrode shell material is glass.
Scope of application: biological engineering, pharmaceutical, beer, chemical, semiconductor and electronic industries or places with certain corrosive effect.
6,Antimony electrode
Antimony electrode is a PH sensitive electrode, because it is more solid, so it is most suitable for use in the requirements of electrode solid occasions, such as: containing hydrofluoric acid solution PH test.
Scope of application: breeding, sewage, online monitoring of hydrofluoric acid.
