
RTM Flameproof pH and ORP Analyzer Controller
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A. Product Overview
RTM-ANL-PHORP-CONT-2496F is an advanced online pH and ORP Analyzer Controller used for continuous measurement and control of pH or oxidation reduction potential in liquid processes. It is suitable for industrial applications where real-time pH or ORP monitoring is required along with relay control, analog retransmission and digital communication.
This model is part of the RTM pH and ORP controller range and includes the flame proof body option. It is suitable for industrial process areas where a stronger enclosure is preferred for plant safety and environmental protection. The flame proof body option should be selected based on actual site requirements and applicable approval needs.
The controller can be configured for pH measurement or ORP measurement depending on the connected sensor and process requirement. It supports pH measurement from 0 to 14 pH and ORP measurement from minus 2000 to 2000 mV.
RTM-ANL-PHORP-CONT-2496F is useful in water treatment panels, chemical dosing panels, effluent treatment systems, process water monitoring systems and automation panels where online liquid quality measurement is required.
B. Working Principle
RTM-ANL-PHORP-CONT-2496F works by receiving an electrical signal from a connected pH sensor or ORP sensor installed in a tank, pipeline, flow cell or process liquid line.
For pH measurement, the pH sensor detects hydrogen ion activity in the liquid and generates a millivolt signal. The controller converts this signal into a pH value. A lower pH value indicates acidic liquid, while a higher pH value indicates alkaline liquid.
For ORP measurement, the ORP sensor measures oxidation reduction potential in millivolts. ORP indicates whether the liquid has oxidizing or reducing characteristics. This is useful in disinfection, chlorination, oxidation control and chemical treatment applications.
The controller supports temperature compensation for pH measurement. This helps improve reading stability because pH sensor response changes with liquid temperature.
The measured value is shown on the OLED LCD display. Based on programmed set points, the relay outputs can operate acid dosing pumps, alkali dosing pumps, oxidant dosing pumps, alarms, control valves or interlock circuits. The 4 to 20 mA retransmission output and RS485 Modbus RTU communication allow the measurement to be sent to PLC, SCADA, recorder, data logger or remote monitoring system.
C. Why It Is Used
RTM-ANL-PHORP-CONT-2496F is used to continuously monitor and control pH or ORP in water and process liquid systems. pH and ORP are important parameters in water treatment, wastewater treatment, chemical dosing, disinfection and industrial process control.
In ETP and STP plants, pH control helps maintain proper neutralization, biological treatment and discharge quality. In chemical dosing systems, the controller helps automate acid and alkali dosing. In disinfection systems, ORP monitoring helps verify oxidation strength and chemical effectiveness.
The flame proof body option makes this model suitable for demanding industrial environments where a rugged controller enclosure is required. It is useful for chemical plants, solvent handling areas, industrial effluent systems, hazardous process areas and heavy-duty plant applications, subject to site safety requirements.
Main reasons for using RTM-ANL-PHORP-CONT-2496F include:
- Continuous online pH and ORP monitoring
- Flame proof body option for industrial process environments
- OLED LCD display for clear process value indication
- Relay output for dosing, alarm and interlock control
- 4 to 20 mA retransmission output for PLC and recorder connection
- RS485 Modbus RTU communication for automation systems
- Temperature compensation for stable pH measurement
- Suitable for ETP, STP, water treatment and chemical process applications
- Reduced dependency on manual liquid testing
- Better control of acid, alkali, oxidant and chemical dosing
D. Suitable Buyers
RTM-ANL-PHORP-CONT-2496F is suitable for buyers who need online pH or ORP measurement with flame proof body option, relay control, analog output and digital communication.
Suitable buyers include:
- Chemical process industries
- ETP plant manufacturers
- STP plant manufacturers
- Water treatment plant suppliers
- Industrial wastewater treatment plants
- Chemical dosing system manufacturers
- Pharma utility departments
- Food and beverage process plants
- Textile and dyeing industries
- Cooling water treatment companies
- Hazardous process area users
- Panel builders
- Automation system integrators
- PLC and SCADA solution providers
- Environmental monitoring companies
- Maintenance and purchase departments looking for flame proof pH and ORP controllers
FAQ
1. What is RTM-ANL-PHORP-CONT-2496F?
RTM-ANL-PHORP-CONT-2496F is a flame proof pH and ORP Analyzer Controller used for online pH and ORP measurement, dosing control, alarm operation and automation integration in industrial liquid applications.
2. What does the F mean in RTM-ANL-PHORP-CONT-2496F?
The F indicates the flame proof body option as per the product ordering structure in the catalog.
3. Can RTM-ANL-PHORP-CONT-2496F measure both pH and ORP?
Yes, the controller range supports pH or ORP operation depending on the selected configuration and connected sensor.
4. What is the pH measuring range?
The pH measuring range is 0 to 14 pH.
5. What is the ORP measuring range?
The ORP measuring range is minus 2000 mV to 2000 mV.
6. What type of display is used in this controller?
RTM-ANL-PHORP-CONT-2496F uses an OLED LCD display for clear measurement indication.
7. What is the resolution of this controller?
The listed resolution is 0.001 pH for pH measurement and 1 mV for ORP measurement.
8. What is the accuracy of RTM-ANL-PHORP-CONT-2496F?
The listed accuracy is plus or minus 0.1 pH and plus or minus 2 mV.
9. Does this controller support temperature compensation?
Yes, it supports temperature compensation for pH measurement.
10. Does RTM-ANL-PHORP-CONT-2496F have relay output?
Yes, it has two relay outputs for dosing control, alarm operation, pump control and process interlocking.
11. What is the relay rating?
The catalog lists the relay output rating as 3A.
12. Does this controller have analog output?
Yes, it provides 4 to 20 mA retransmission output for sending the measured value to PLC, SCADA, recorder, remote indicator or data logger.
13. Does RTM-ANL-PHORP-CONT-2496F support RS485 communication?
Yes, it supports RS485 Modbus RTU communication.
14. Can this controller be connected to PLC or SCADA?
Yes, it can be connected to PLC or SCADA using 4 to 20 mA retransmission output or RS485 Modbus RTU communication.
15. What is the power supply requirement?
The catalog mentions 90 to 260 VAC power supply and 24 VDC optional power.
16. Where is RTM-ANL-PHORP-CONT-2496F commonly used?
It is commonly used in ETP, STP, water treatment plants, chemical dosing systems, cooling water treatment, wastewater treatment, process water systems, pharma utilities, food and beverage plants, chemical plants and industrial automation panels.
17. Can it be used for acid and alkali dosing?
Yes, it can be used for acid and alkali dosing control by using set points and relay outputs to operate dosing pumps.
18. Can it be used for ORP-based disinfection monitoring?
Yes, when connected with an ORP sensor, it can be used for oxidation reduction potential monitoring in disinfection, chlorination, oxidation and chemical treatment systems.
19. What type of sensor is used with this controller?
It is used with a suitable pH sensor or ORP sensor depending on the application. Sensor selection depends on liquid type, temperature, pressure, mounting connection, cable length and process compatibility.
20. Is this model suitable for chemical plant applications?
Yes, it is suitable for chemical process applications where pH or ORP monitoring is required and a flame proof body option is preferred.
21. Is this controller suitable for wastewater treatment?
Yes, it is suitable for wastewater treatment because pH and ORP control are important for neutralization, chemical dosing, biological treatment, disinfection and discharge quality.
22. Who should buy RTM-ANL-PHORP-CONT-2496F?
This product is suitable for chemical plants, ETP and STP manufacturers, water treatment companies, chemical dosing system makers, hazardous process users, panel builders, system integrators, pharma plants, food and beverage plants, textile units and industrial maintenance teams.




