Inductive measuring conduction converter FLS C6.30. Electric conductivity sensors aqueous solutions Instructions for measuring transducer CST 2 conductivity

IET40 converter series Sets new standards for measuring conductivity in production. One device measures the conduction in the range of approximately 500 ... 1,000 msm / cm. Also measures the temperature with an accuracy of 0.2 ° C.

Concentration sensor There may be two measurement factor and, using Windows oscillates to configure outputs 4 ... 20 mA, measuring conductivity,% solution concentration, temperature, ppm or saline.

The RS-485 interface provides managed access to all configuration parameters and measurements of the conductivity sensor in online mode.

The operator's operation facilitates the presence of a 3-line monochrome LCD display with illumination, which displays the measured values \u200b\u200band the state of the system.

• Easy to install
• Inexpensive connection cable
• Operates at low voltage
• One sensor - many applications
• IP66 stainless steel housing
• LCD display, 3 lines of 12 characters
• Selection of technological connections of the sensor
• Non-electrode removable conductivity sensor
• Fast temperature response T 90< 10 сек
• Can be configured and calibrated before the sale
• Full setting Devices via software under Windows ™
• Two analog outputs 4 ... 20 mA and RS485 interface
• Designed for food, dairy, brewing industry
• Resistance to thermal splashes up to 135 ° C with steam sterilization
• Measurement of conductivity,% concentration of solution, saline and temperature

The main features of the concentration and conductivity converter

• Monitoring

  View conduction sensor output. Converting the conduction values \u200b\u200bwith / without temperature compensation, plus temperature and some user-programmed parameter, in this case,% sodium chloride concentration (NaCl).

• Setting

  Setting analog outputs:

  • Measurement of conductivity, concentration of solution, salt solidity of the solution, solids or temperature
  • Setting up 4 and 20 mA values.
  • Setting up digital output
  • Permanent dimension conductivity, temperature plus additional parameter, such as a concentration.

  Setting the Table Table. Special range for conductivity / concentration data.

• Diagnostics

  Checking the operation of the outputs of 4-20 mA, with the help of a forced installation of fixed values

  It is very useful when entering the sensor to operate or check the calibration of devices connected to the converter.

  Permanent display of system messages and sensor configuration

Technical characteristics of IET40 conductivity sensors

Information for ordering IET40 conductivity converters

Example: IET40 + ECS-59T-X4

With the help of electrical conductivity sensors, the ability of the solution is measured electricity. This ability is determined by the number of ions contained in the solution, and the number of ions is one of the parameters that is used to determine the amount of impurities in the liquid.

Measuring electrical conductivity is simple enough and at the same time effective method Water quality control is purified water, tap water, NaCl solutions and marine water of the same temperature have different electrical conductivity.

PRINCIPLE OF OPERATION

In solution, the electrical conductivity of which is measured, the pair of electrodes is placed. AC voltagewhich is fed to the electrodes leads to the movement of the ions contained in the solution, which creates an electric current i.. There are two voltage drop measurement schemes: 2-electrode and 4-electrode.

In the first case drop voltage U out it is measured between the current electrodes, and in the 4-electrode circuit for measurements, an additional pair of potential electrodes is used. Voltage drop U out it is the indicator of the conductivity of the solution.

Electrical conductivity σ determined as a value, reverse resistance in a given cell. The cell is called the volume limited to current electrodes that have an area S. and removed from each other for distance d. . The values \u200b\u200bS and D are determined by the geometry of the sensor, so they are unchanged and expressed through the cell constant k. :

k \u003d d / s - Cell constant, cm -1. Thus, the specific conductivity is calculated by the formula M σ \u003d k / r or σ \u003d (k * i) / u out where the variable is voltage U out

The conductivity is defined as the concentration of ions contained in solution and their mobility. Both of these parameters depend on the temperature of the solution, so the measurement of electrical conductivity should be carried out in conjunction with the control of the fluid temperature.

Since both the concentration of ions and their mobility depend on the temperature of the solution, when measuring the conductivity, it is necessary to control the temperature.

Sensor structure of electrical conductivity

The sensitive element consists of two pairs of electrodes and temperature sensor - thermo resistance PT1000.

Series of sensors of electrical conductivity

IST manufactures three series of conductivity sensors - LFS1305, LFS1505 and LFS1710, which differ in the magnitude of the sensor cell constant.

Until 2017, the LFS155 and LFS117 designations are used for the LFS1505 and LFS1710 series. Sensors with "old" designations do not have any constructive differences compared to the "new" sensors.

The characteristics of the electrical conductivity sensors are shown in the table.

Cost of sensors

Retail prices are valid when buying sensors in an amount of up to 10 pieces. You can count on a significant price reduction when ordering wholesale, for example, when ordering from 100 pcs. The price of the electrical conductivity sensor will decrease by 25% relative to the retail.

Available performances of sensors

The sensors of each series are available in various versions, which differ in the length and type of outputs, as well as the tolerance class of the built-in thermal resistance.

On request, sensors are also available in an additional plastic case.

To decrypt the designations of electrical conductivity sensors, you can use the following scheme:

DOCUMENTATION

Documentation for electrical conductivity sensors is available on

FLS C6.30 is a family of measuring conduction transducers,
which includes a 4-20 mA output device (two-wire), built into the inductive conductivity sensor. This type of measuring technology provides a wide
Range of use, especially for measuring high conductivity values \u200b\u200b(up to 1000
Millisimames) in aggressive liquids (PVCC is the only wettable material). Since no electrodes come into contact with fluid, reliability and measurement stability are guaranteed over a long period of operation. Relevant
Automatic temperature compensation is provided by PT100 built into the instrument housing. Isolated output 4-20 mA perfectly suitable for direct connections from PLC or data recorders without additional interfaces. The measuring transducer and temperature sensor are supplied in the already calibrated form.

Areas of use

• Water treatment
• Sewage treatment
• Cooling towers
• Systems scrubber
• Metal processing
• Measurements of corrosion and precipitating liquids

Key Features

• Resistance to corrosion and formation of plaque
• Compact measuring transducer
• Calibration is not required
• Easy installation
• Built-in PT100 sensor
• Suitable for installation in immersed state

General

• Case material: CPVC
• Case Length: 207 mm
• Case: IP68.
• Power supply: 10-30 V post. Tok.
• Maximum operating pressure / operating temperature:
  • 10 bar (145 psi) at + 25 ° C (77 ° F)
  • 6 bar (87psi) at + 50 ° C (122 ° F)
• Technological connection: Outdoor thread 1½ "NPT

Standards and certification

• Produced according to ISO 9001
• Produced according to ISO 14001
• ROHS compliance
• GOST R.

1. Cable: 3 m (9 feet)
2. Outer thread: 1½ "NPT
3. Coating: C-PVC