ORP Sensors

A: The standard measuring range of industrial ORP sensors is typically -2000 to +2000 mV. The actual range depends on the electrode material, reference system, and transmitter configuration.

A: A single ceramic junction electrode has a simple structure and is suitable for general water treatment applications. A double salt bridge electrode provides better protection against contamination and chemical interference, offering longer service life in wastewater, chemical, and high-pollution environments.

A: Yes, some industrial ORP probes can operate continuously at up to 80℃, depending on the electrode material, sealing structure, and housing type. For higher temperatures, special high-temperature versions are recommended.

A: Yes. Digital ORP sensors can support RS485 Modbus RTU communication, allowing direct connection with PLCs, SCADA systems, and industrial control platforms for real-time monitoring.

A: Platinum electrodes have good chemical stability and can be used in many sulfide wastewater applications. However, high concentrations of sulfide may contaminate the electrode surface and require regular cleaning and maintenance.

A: Common optional accessories include flow cells, immersion holders, pipe installation fittings, mounting brackets, cleaning systems, junction boxes, and sensor cables depending on the installation method.

A: Under normal municipal wastewater conditions, the typical service life is around 12–24 months. Actual lifetime depends on water quality, cleaning frequency, temperature, and maintenance conditions.

A: Yes, PVDF housing provides excellent chemical resistance and can be used in many strong acid applications. The final suitability depends on acid type, concentration, temperature, and electrode sealing materials.

A: Combined pH&ORP sensors can integrate a temperature sensor (such as Pt1000 or NTC) for automatic temperature compensation of pH measurement. ORP measurement itself generally does not require temperature compensation, but temperature data can be monitored simultaneously.

A: ORP probes with PG13.5 thread are commonly installed in matching flow cells or holders designed for PG13.5 threaded sensors, usually with 1/2" or 3/4" process connections depending on the flow cell design.

A: Online ORP calibration is usually performed by: 1) Cleaning the electrode; 2) Checking sensor condition; 3) Immersing it in standard ORP calibration solution (such as 220 mV or 468 mV solution); 4) Adjusting the transmitter reading; 5) Confirming stable measurement after installation.

A: Yes. Explosion-proof ORP measurement systems are available with certified transmitters and suitable sensor assemblies for hazardous areas. Certification depends on the target market, such as ATEX, IECEx, or local explosion-proof standards.

A: Standard ORP electrodes are not recommended for extremely low conductivity ultrapure water because unstable reference potential and low ionic strength can cause measurement drift. Special low-conductivity electrodes are recommended.

A: The maximum pressure depends on the sensor model and installation holder. Typical industrial immersion ORP probes can withstand around 0.3–1.0 MPa, while high-pressure models can support higher ratings.

A: Yes. Cable length can usually be customized, commonly available from 5 m, 10 m, 15 m, 20 m, or according to customer requirements.

A: Common causes include: electrode contamination, aging reference junction, air bubbles on the sensor surface, insufficient grounding, chemical interference, improper calibration, or exhausted electrolyte.

A: Yes, ORP calibration solutions can be supplied separately or as an optional accessory, commonly available in 220 mV, 256 mV, 468 mV, and other standard values.

A: Yes. Sanitary clamp ORP probes designed for hygienic applications can support SIP (Steam-In-Place) sterilization, typically depending on the probe design, sealing material, and maximum temperature rating.