Online Conductivity Sensor Easy to install submerged installation
Ip68
Drinking water/surface water/various water supplies/industrial
water treatment
- Signal Output: RS-485(Modbus/RTU protocol)
- Convenient to connect to PLC, DCS, Industrial Control Computer,
General Controller, paperless recording instrument or touch screen
and other third-party equipment.
- Easy to install: submerged installation.
- Ip68, containment level.
| Model number | KEC310 |
| Range and resolution | 0-5000μs/cm | 1 |
| Precision | ± 1.5% F.S. |
| Operating temperature | 0 ~ 65 °C |
| Working pressure | < 0.6 mpa |
| Power supply | 12 ~ 24 VDC ± 10% |
| Signal output | RS-485(Modbus/RTU) |
| Contact material | Abs |
| Installation mode | Immersion mounting |
| Cable length | 5 meters, other length can be customized |
| Temperature compensation | Automatic temperature compensation (PT1000) |
| Calibration mode | Two-point calibration |
| Power consumption | < 0.05 W |
| Protection level | IP68 |
6.Tips:Total Dissolved Solids (TDS)
Devices for measuring electrical conductivity are often used to
measure total dissolved solids (TDS). It is a measure of the total weight of all organic and inorganic
substances contained in a liquid in various forms: ionized,
molecular (dissolved), colloidal and suspended (not dissolved).
Dissolved solids refer to any inorganic salts, mostly calcium,
potassium, magnesium, sodium, chlorides, bicarbonates and sulfates,
and some organic matter dissolved in water. The solid substances
contained in a liquid, which is considered for TDS, must be either
dissolved or in the form of very small particles that will remain
the solution after filtration through a filter with very small
pores (2 micrometers or less). Substances that are permanently
suspended in a solution, but cannot pass through a filter are
called total suspended solids or TSS. Total dissolved solids are usually measured in water to determine
its quality.
There are two main methods of measuring total dissolved solids: gravimetric analysis, which is the most accurate method, and conductivity measurement. The first method is the most accurate, but it is time-consuming
because all water must be evaporated, to dryness, usually at 180°C
under strict laboratory conditions and then the mass of residues is
measured.
The second method is not as accurate as the gravimetric analysis.
However, the conductivity method is the most convenient, useful,
widespread, and fastest method because it is a simple measurement
of conductivity and temperature, which can be done in seconds using
a low-cost device. This method can be used because the electrical
conductivity of water is directly related to the concentration of
ionized substances dissolved in water. It is especially useful for
quality control purposes like control of drinking water or
estimation of the total number of ions in a solution.
The conductivity measurements are temperature dependent, that is,
if the temperature increases, the conductivity also increases
because the ions in a solution are moving faster. To obtain
temperature-independent measurements, the concept of reference
temperature was introduced. It allows a comparison of conductivity
results obtained at different temperatures. Thus, the conductivity
meter can measure the actual conductivity and the temperature and
then use a temperature correction function to automatically convert
the measured value to the reference temperature of 20 or 25°С. If
very high accuracy is necessary, the sample can be put into a
thermostat, and then the meter will be calibrated at the same
temperature that is used for measurement.
Most modern conductivity meters contain a built-in temperature
sensor that can be used for temperature correction as well as for
temperature measurement. The most sophisticated meters can measure
and display conductivity, resistivity, salinity, TDS, and
concentration. However, all of them measure only conductivity and
temperature and then calculate the necessary physical value and
make temperature compensation.
