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InPro 4850i pH/ORP Probes
High Performance in Tough Chlor-Alkali Processes
The InPro 4850i is a dual-membrane pH and ORP sensor specifically designed for chlor-alkali processes. This pH sensor has no diaphragm, making it immune to chlorine and other oxidizing agents that can lead to failure in other pH and ORP electrodes. The InPro 4850i is a digital, Intelligent Sensor Management (ISM) pH sensor that is immune to interference and distortion and ensures 100% signal integrity and stability, with advanced diagnostics to help manage maintenance.
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Long Life in Chlor-Alkali Applications
The probe has a sodium-sensitive membrane and uses the chlor-alkali process brine as reference. The reference system has no junction, which allows the probe to resist oxidation and extends the sensor's life.
Designed to Withstand Harsh Conditions
InPro 4850i pH sensor has no diaphragm, making it immune to chlorine and other oxidizing agents that can lead to failure in other pH and ORP electrodes.
Advanced Digital pH Sensor with ISM
The InPro 4850i features Intelligent Sensor Management (ISM) technology and a digital signal that is immune to interference and distortion, ensuring 100% signal integrity and stability.
Diagnostics to Reduce Maintenance
ISM predictive diagnostics allow the shift from time-based maintenance to predictive maintenance. The sensor diagnostics tell operators when calibration and replacement should be performed.
Versatile pH and ORP Sensor
This combined pH and ORP InPro 4850i sensor uses a platinum solution ground and shielding system that stabilizes the signal and enables redox measurement.
Compliance with Safety Regulations
The InPro 4850i chlor-alkali pH and ORP sensor is Ex certified, so it can be used for demanding processes in the hazardous-classified zones of your production facility.
Useful Related Links
Datasheet InPro 4850i
The InPro 4850i combination pH electrode incorporates a sodium-sensitive glass membrane that uses the sodium concentration of the chlor-alkali process brine as a reference. The sensor’s reference system has no diaphragm and is therefore immune to chlorine and other oxidizing agents, ensuring long sensor lifetime. Read more
Case Study on Chlor-Alkali Process pH Measurement
Accurate pH measurement is critical in chlor-alkali processes, but the conditions are very tough on conventional pH sensors. Using a sensor designed specifically for chlor-alkali applications, Evonik Industries has cut sensor maintenance by 80%. Read more
Case Study on Chlor-Alkali pH Sensors
This case study describes how at a US chlor-alkali site, pH and ORP measurements in harsh conditions were extremely problematic. METTLER TOLEDO was given the opportunity to show that we could make these measurement points more reliable, less expensive and safer to operate with InPro 4850i sensors. Read more
Application Note on pH Measurements in Chlor-Alkali Production
A combination of elevated temperatures, the presence of oxidants, and highly sensitive sensor output signal makes reliable pH measurement in the chlor-alkali process very challenging. This application note reviews these problems in relation to membrane cell chlorine production and explains how the InPro 4850i pH sensor solves all the measurement issues. Read more
White Paper on Durable Chlor-Alkali pH Electrodes
This white paper explains: Membrane cell chlorine production, problems with conventional pH electrodes, pNa/pH technology, measurement challenges, plug and Measure – fast and simple start up. Read more
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FAQs
What is the InPro 4850i sensor?
The InPro 4850i is a dual-membrane pH and ORP sensor for measuring processes with a stable sodium concentration. This probe combines accurate measurement with durability for tough environments.
What lengths is the InPro 4850i series available in?
The InPro 4850i pH sensor is available in 120 mm and 225 mm lengths.
Why do I need a special pH sensor for chlor-alkali processes?
A special pH sensor is needed for chlor-alkali processes because these processes are very though on pH electrodes: chlorine poisons sensor reference systems, crystalized brine and precipitated impurities clog diaphragms, and the environment corrodes contacts. Additionally, the high-impedance output signal of sensors designed for the process is highly susceptible to interference. In short, sensors perform poorly and fail quickly.
The InPro 4850i dual-membrane pH electrode answers all these problems. Its reliability, longevity and low maintenance ensure exceptional measuring performance, no matter how tough it gets.
What are the key features of the InPro 4850i sensor?
The key features of the InPro 4850i pH sensor that make it suitable for chlor-alkali processes are:
- Sodium-reference (pNa) system. The electrode features a sodium-sensitive glass membrane which is charged by the sodium ions in the brine. The sensor uses the sodium concentration of the brine itself as a reference.
- The absence of a diaphragm ensures stable measurement and eliminates drift. The pNa reference system is hermetically sealed; there is no diaphragm, therefore no oxidants can enter the electrode and attack the reference system.
- Digital output provides 100% signal stability. The InPro 4850i features Intelligent Sensor Management (ISM). This technology transmits a digitized signal from the sensor to the transmitter. As the signal is digital, it is low impedance so arrives at the transmitter unaffected by electrical interference.
What transmitters is the InPro 4850i compatible with?
The InPro 4850i family of pH sensors integrate with any appropriate METTLER TOLEDO transmitter. These include the M300, M400 and M800 transmitters. The transmitter you choose depends on your environment and complete measurement requirements. The exact transmitter for your application should be selected in consultation with your local METTLER TOLEDO representative.