ProMinent Dulcotest - ORP Sensors

Reliable online measurement of ORP – with DULCOTEST sensors

Our product line of DULCOTEST ORP electrodes provides a wide range of sensors for different measuring tasks. The field of application covers everything from simpler water treatment tasks to industrial process waters with more stringent requirements in terms of temperature, pressure, contamination tolerance and chemical resistance.

The production of our electrodes is subject to very strict quality controls. Routine steps are automated but critical steps are carried out manually under expert supervision. In this way we achieve optimum reproducible quality and cost reduction.

ORP potential is a measured variable that quantifies the presence of oxidants or reducing agents in a medium under specific conditions on a non-selective basis. Measuring this parameter is relatively inexpensive, but does have some drawbacks: no selective measurement of a specific oxidant / reducing agent, strong dependence on pH, measuring signal tends towards a saturation curve as concentration increases. To measure specific reducing agents and oxidants selectively, without the above disadvantages, suitable amperometric sensors are used (e.g. chlorine sensors).

• Precise and reliable measurement enables efficient processes and maximum process reliability
• The wide choice of sensor types with different constructions makes them reliable components in many applications
• A long service life is achieved through the use of select quality materials for the measuring electrodes and diaphragms and a stable reference system. This minimises both downtime and maintenance
• With short storage times and fast delivery, your sensors can be up and running very quickly and you can make maximum use of their service life (all glass sensors start to age as soon as they leave production)
• Wide range of special versions for fitting length, cable length and plugs for made-to-measure connection to your process
• Unique label for OEM partners

• Selection of sensor type according to the application
• The insertion angle must be > 15° from the horizontal
• Maximum flow < 0.8 m/s
• With cable lengths > 10 m, use the 4-20 mA transducer type PHV1
• Calibration using quality buffer solutions

ORP sensor optimised for use in potable water treatment, swimming pools/hot tubs at up to 60 °C/3 bar

Your benefits

• Electrochemical combination electrode: ORP and reference electrode integrated
• Diaphragm and reference system optimised for use in swimming pools and for potable water
• Ceramic diaphragm with special material, optimised size and optimised pore diameter
• Long service life due to reduced diffusion ("bleeding") of the electrolyte
• Long service life due to the material, which is inert to aggressive disinfectants
• Stable reference system
• Rotating sensor head sleeve. This means that the cables can remain connected during installation and dismantling of the sensor, avoiding moisture on the plug-in contacts
• Lead-free glass for advanced and environmentally-friendly production, use and disposal (RoHS-compliant)

• Temperature: 0 … 60 °C
• Max. pressure: 3.0 bar
• Min. conductivity: 150 µS/cm
• Electrolyte: Gel containing potassium chloride
• ORP electrode: Platinum
• Diaphragm: Ceramic
• Sensor shaft: Glass
• Shaft diameter: 12 mm
• Fitting length: 120 ±3 mm
• Fitting position: Vertical up to +25°
• Thread: PG 13.5
• Electrical connection: SN6 plug-in head, rotatable with a ProMinent cable
• Enclosure rating: IP 65
• Installation: Bypass: open outlet or return of the sample water into the process line, inline: direct installation into the pipework; fixed or replaceable (replaceable fitting), tank, channel: Immersion in the immersion tube
• Measuring and control equipment: all DULCOMETER controllers
• Typical applications: Swimming pools, whirlpools, potable water.
• Resistance to: Disinfectant
• Measuring principle, technology: Direct potentiometric measurement, 2 electrodes, gel electrolyte, ceramic diaphragm