Overview of the E+H Conductivity Product System
E+H conductivity products are divided into three major categories by function: conductivity sensors are responsible for signal detection, conductivity transmitters are responsible for signal processing, and calibration kits are used for maintenance and calibration. Sensors and transmitters used together can achieve richer functions.
Core Differences Between Analog and Digital Electrodes
Before selection, it is necessary to clarify the differences between analog and digital sensors in order to match the requirements of the working conditions.
Communication Method
- Analog: Relies on physical contact to transmit analog signals and is susceptible to interference.
- Digital: Achieves digital transmission through non-contact induction, has strong anti-interference capability, and needs to be paired with a Memosens transmitter.
Data Storage
- Analog: Cannot store parameters.
- Digital: Can store manufacturing, calibration, application, and other parameters, and can be read through specific devices.
Operation and Maintenance
- Analog: Requires on-site calibration, parameters must be reset after replacing the sensor, and there is no automatic fault detection.
- Digital: Supports offline pre-calibration, parameters are automatically transmitted when replacing the sensor, and faults can be automatically reported.
Safety and Applicable Scenarios
- Analog: No electrical isolation, weak EMC optimization, suitable for conventional non-hazardous area measurement.
- Digital: Has electrical isolation, EMC safety, and hazardous area certification, suitable for complex and hazardous scenarios such as chemical plants and power plants.
Conductivity Sensors
Sensors are directly inserted into the medium to collect conductivity data and can be further subdivided by signal type, number of electrodes, and applicable scenarios.
By Signal Type
- Analog sensors: Output analog signals, used with transmitters, low cost, suitable for conventional interference environments. Common models: CLS16B, CLS16, CLS15, CLS50, CLS52, CLS54, CLS13, CLS12, CLS21.
- Digital sensors: Directly output digital signals, have stronger anti-interference capability, suitable for long-distance transmission or high electromagnetic interference scenarios. Common models: CLS15D, CLS16D, CLS16E, CLS21D, CLS21E, CLS50D, CLS54D, CLS82D, CLS82E.
Analog sensors are lower in price, but their applicable scenarios are relatively fewer.
By Number of Electrodes and Structure
- Conventional electrode sensors: Most basic models use a conventional electrode design, suitable for clean liquids and low-impurity media, covering most analog and digital models, such as the CLS15 series, CLS16 series, CLS21 series, and CLS50 series.
- Four-electrode sensors: Only the CLS82D and CLS82E, which use a four-electrode structure that reduces the effect of electrode polarization, suitable for high-conductivity media or scenarios containing a small amount of solid particles, with more stable measurement accuracy.
Supplementary by Applicable Scenario
- General-purpose sensors: CLS12, CLS13, CLS15 series, CLS16 series, suitable for conventional scenarios such as municipal water treatment and food processing, with low requirements for medium purity and high cost-effectiveness.
- Sensors for special working conditions: CLS50 series, CLS52, CLS54 series, with stronger temperature and pressure resistance, suitable for medium-to-high temperature and pressure scenarios such as industrial circulating water and chemical solutions; the CLS82 series (four-electrode) focuses on high-conductivity or impurity-containing media to avoid measurement deviation.
Conductivity Transmitters
Transmitters convert the conductivity signal collected by the sensor into a standard output signal, while also providing functions such as data display, fault diagnosis, and parameter setting. They are key devices connecting sensors and control systems. There are two mainstream models:
- CLM223: Basic transmitter, cost-effective, supports conventional analog/digital sensor connection, meets scenarios with low functional requirements such as municipal water treatment and civil water purification, and can realize basic conductivity data transmission and fault alarms.
- CLM253: Advanced transmitter, with stronger anti-interference capability, supports a wider measurement range, and has data storage and multi-parameter display functions, suitable for industrial scenarios such as chemicals and pharmaceuticals that require high measurement accuracy and stability.
Calibration Kits
The calibration kit is only available as the CLY421, an auxiliary tool specifically used for calibrating conductivity sensors. Its core role is to regularly calibrate the measurement accuracy of the sensor. After long-term use, sensor electrodes will scale and age, causing data deviation. Through standard calibration solutions and operating tools, the sensor accuracy can be restored to the standard range. It is suitable for all E+H conductivity sensors, especially in scenarios with extremely high accuracy requirements such as pharmaceuticals and electronic ultrapure water, where it is an essential maintenance accessory.
Matching Logic Reference
Choose the corresponding configuration according to actual working conditions; stronger performance is not always better.
| Scenario Type | Sensor | Transmitter | Calibration Kit |
|---|---|---|---|
| Conventional scenarios (e.g., municipal water treatment) | Analog sensor (e.g., CLS16) | CLM223 | Regularly calibrate with CLY421 |
| Complex scenarios (e.g., high-conductivity chemical solutions) | Digital four-electrode sensor (e.g., CLS82D) | CLM253 | Frequently calibrate with CLY421 |
When selecting instruments, simply choose the corresponding equipment according to the corresponding situation; it is not necessarily better to choose equipment with powerful performance.