Overview of the E+H pH/ORP Product System
E+H's pH/ORP product system can be divided into four major categories by core functional module: pH/ORP transmitters responsible for signal processing, pH/ORP electrodes responsible for detection, cables responsible for signal transmission, and cleaning and calibration systems responsible for maintenance assistance. Each product category has a clear function and follows fixed pairing logic.
- Transmitter: Converts electrode signals into standard outputs such as 4-20mA+HART, and provides display and diagnostics.
- Electrode: Directly contacts the medium and collects pH/ORP values.
- Cable: Connects the electrode and transmitter, transmitting weak signals.
- Cleaning and calibration system: Performs regular electrode maintenance, extends service life, and ensures accuracy.
1. pH/ORP Transmitters: The Core of Signal Processing
Core Function
The transmitter is responsible for converting the pH/ORP analog or digital signals collected by the electrode into standard output signals such as 4-20mA+HART. It also provides functions such as data display and fault diagnosis, and is key equipment connecting the electrode to the control system.
Typical Models and Application Scenarios
Currently, the most economical and commonly used models are CPM223/CPM253, suitable for conventional industrial scenarios such as water treatment and chemical neutralization tanks. They are especially suitable for pH/ORP measurement scenarios that are cost-sensitive and do not require complex functions.
| Model | Output Signal | Features | Typical Scenario |
|---|---|---|---|
| CPM223 | 4-20mA+HART | Economical, commonly used | Water treatment, chemical neutralization tanks |
| CPM253 | 4-20mA+HART | Economical, commonly used | Conventional industrial pH/ORP measurement |
Selection tip: For conventional scenarios, prioritize CPM223/CPM253, which balances cost and reliability.
2. pH/ORP Electrodes: The Core Detection Element
The electrode is the core component that directly contacts the medium and collects pH/ORP values. It can be further subdivided by measurement type, signal type, and material, with different types suitable for different scenarios.
1. Pure pH Electrodes (Measure pH Only)
Pure pH electrodes can be divided by signal type and material into four categories: digital, analog, non-glass, and conventional glass. Selection should be based on medium cleanliness, interference intensity, and installation distance.
| Type | Main Features | Common Models | Application Scenarios |
|---|---|---|---|
| Digital pH electrode | Strong signal anti-interference capability, directly outputs digital signals, no additional conversion required | CPS491D, CPS171D, CPS341D, CPS411D, CPS71D, CPS91D, CPS41D, CPS31D, CPF81D, CPS81D | Complex environments such as long-distance transmission and high electromagnetic interference |
| Analog pH electrode | Outputs mV-level analog signals, relatively low cost, must be used with a transmitter | CPS471, CPF201, CPS441, CPS491, CPS91, CPS71, CPS31, CPS11, CPS41, CPF81, CPF81E | Short-distance transmission, conventional interference environments |
| Non-glass pH electrode | Wear-resistant, corrosion-resistant, no risk of glass breakage, longer service life | CPS77D, CPS47D, CPS471D, CPS77E, CPS97E, CPS47E, CPS341D, CPS441, CPS471 | Media containing solid particles and strongly corrosive media |
| Conventional glass pH electrode | High measurement accuracy, fast response speed | CPS11D, CPS11E, CPS12D, CPS12E, CPS41E, CPS71E, CPS31E, CPS61E, CPS97D, CPS91E | Clean liquids and low-impurity scenarios |
2. Pure ORP Electrodes (Measure Redox Potential Only)
Pure ORP electrodes are divided by signal type into digital and analog. The former has stronger anti-interference capability, while the latter has lower cost and broader adaptability.
| Type | Main Features | Common Models | Application Scenarios |
|---|---|---|---|
| Digital ORP electrode | Strong anti-interference capability, stable long-distance transmission | CPS72D, CPS42D, CPF82D, CPS12D, CPS12E (some models) | Complex industrial scenarios such as plating baths and printing and dyeing wastewater monitoring |
| Analog ORP electrode | Low cost, strong adaptability | CPS92E, CPS72E, CPS42, CPS12, CPF82, CPF82E, CPS72, CPS92, CPS42E, CPS62E | Conventional ORP monitoring scenarios such as municipal sewage and swimming pool water quality |
3. pH/ORP Combination Electrodes (Measure pH and ORP Simultaneously)
This type of electrode adopts an integrated design, which reduces installation space and simultaneously outputs pH and ORP signals. It is suitable for scenarios requiring simultaneous monitoring of both parameters, such as chemical reactors and aquaculture water quality monitoring.
| Type | Main Features | Common Models | Application Scenarios |
|---|---|---|---|
| pH/ORP combination electrode | Integrated design, simultaneously outputs pH and ORP signals | CPS76E, CPS96E, CPS16E, CPS76D, CPS96D | Chemical reactors, aquaculture water quality monitoring |
3. pH/ORP Cables: Signal Transmission Components
The main function of the cable is to connect the electrode and transmitter and transmit detection signals. Suitable models must be selected according to electrode type and installation distance. Poor-quality or mismatched cables will directly affect measurement stability.
| Model | Type | Suitable Distance | Suitable Environment | Adaptation Notes |
|---|---|---|---|---|
| CYK10 | Conventional pH signal transmission cable | Short distance within 10 meters | Conventional environment | Compatible with most analog or digital pH electrodes |
| CPK9 | Anti-interference pH signal cable | Long distance of 10-50 meters | High electromagnetic interference environment | Suitable for long-distance pH signal transmission |
4. Cleaning and Calibration Systems: Maintenance Auxiliary Equipment
The core function of the cleaning and calibration system is to regularly clean the electrode surface (remove dirt and avoid measurement deviation) and calibrate electrode accuracy (ensure measurement accuracy), thereby extending electrode life. By function, it can be divided into integrated cleaning and calibration dual-function systems and cleaning-only systems.
| Model | Function | Degree of Automation | Application Scenarios |
|---|---|---|---|
| CDC90 | Integrated cleaning and calibration dual function | High, suitable for unattended operation | Scenarios with high-frequency maintenance needs such as continuous-production chemical plants |
| CYC | Cleaning function only | Simple structure, relatively low cost | Scenarios with light contamination and only regular cleaning required, such as municipal water treatment plants |
5. Key Points for E+H pH/ORP System Selection
During actual selection, it is recommended to match the transmitter, electrode, cable, and cleaning and calibration system according to the following steps to ensure the entire measurement solution is stable and reliable.
- Determine measurement parameters: pH only, ORP only, or pH/ORP combined measurement.
- Select electrode type: Based on medium cleanliness, corrosiveness, particulate content, and electromagnetic interference intensity, choose digital, analog, non-glass, or conventional glass electrodes.
- Match transmitter: For conventional economical scenarios, choose CPM223/CPM253; consider higher-configuration models only for complex functional requirements.
- Select cable: For short-distance conventional environments, choose CYK10; for long-distance or strong-interference environments, choose CPK9.
- Configure cleaning and calibration: For high-frequency maintenance or unattended scenarios, choose CDC90; for regular cleaning only, choose CYC.